@article {1070, title = {An Adaptive Method for Camera Attribution Under Complex Radial Distortion Corrections}, journal = {IEEE Transactions on Information Forensics and Security}, volume = {19}, year = {2024}, pages = {385-400}, keywords = {Adaptation models, adaptive processing, cameras, Distortion, distortion correction, Fingerprint recognition, forensics, Image forensics, Lenses, PCE, photo response non-uniformity, PRNU, radial correction, Smart phones, source attribution}, doi = {10.1109/TIFS.2023.3318933}, url = {https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=10265255}, author = {Montibeller, Andrea and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {1060, title = {Multibeam Compact Dual Reflectarray Antenna for High-Throughput Satellites in Ka-Band}, booktitle = {18th European Conference on Antennas and Propagation}, year = {2024}, author = {Daniel Mart{\'\i}nez-de-Rioja and Eduardo Mart{\'\i}nez-de-Rioja and Y Rodr{\'\i}guez-Vaqueiro and A Pino and Carlos Mosquera and Jos{\'e} A. Encinar and Giovanni Toso} } @conference {1075, title = {Radio Maps for Beam Alignment in mmWave Communications with Location Uncertainty}, booktitle = {IEEE 99th Vehicular Technology Conference: VTC2024-Spring. Workshop "Radio Map for 6G Communications"}, year = {2024}, month = {accepted}, address = {Singapore}, abstract = {
\
}, author = {Khawar Hussain} } @conference {1073, title = {Towards Traitor Tracing in Black-and-White-Box DNN Watermarking with Tardos-Based Codes}, booktitle = {2023 IEEE International Workshop on Information Forensics and Security (WIFS)}, year = {2023}, pages = {1-6}, keywords = {Artificial neural networks, black-box, Closed box, Codes, Data security, DNN watermarking, Fingerprinting, forensics, Tardos codes, Training, Traitor tracing, watermarking, white-box}, doi = {10.1109/WIFS58808.2023.10374879}, url = {https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=10374879}, author = {Elena Rodr{\'\i}guez-Lois and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {1031, title = {Contribution of NOMA Signalling to Practical Multibeam Satellite Deployments}, booktitle = {11th Advanced Satellite Multimedia Conference and 17th Signal Processing for Space Communications Workshop}, year = {2022}, author = {Tom{\'a}s Ram{\'\i}rez and Carlos Mosquera} } @conference {1029, title = {A Critical Look into Quantization Table Generalization Capabilities of CNN-based Double JPEG Compression Detection}, booktitle = {EUSIPCO}, year = {2022}, address = {Belgrade, Serbia}, abstract = {Double JPEG compression detection has become a core issue in image forensics, as it provides information about the processing history of the image and its authenticity. Several recent works address this problem by exploiting the potential of CNNs to achieve state-of-the-art performance on test datasets. Unfortunately, those schemes are typically tailored to their specific training conditions and suffer a significant drop of performance in real-life scenarios. This paper aims at assessing the influence of quantization table mismatch (with regards to those seen in training) in the detection of double JPEG compression. Experimental results show inconsistency between different sets of quantization tables, with trained models yielding significantly worse results on unknown sets. This effect is also evident in a more realistic setting, where it appears to be more noticeable for sources falling in operating regions with greater inconsistency.
},
keywords = {Convolutional Neural Networks, Double JPEG compression, Image forensics, Source heterogeneity},
author = {Elena Rodr{\'\i}guez-Lois and David V{\'a}zquez-Pad{\'\i}n and Fernando P{\'e}rez-Gonz{\'a}lez and Pedro Comesa{\~n}a}
}
@conference {1026,
title = {A Dynamic Codebook Design for Analog Beamforming in MIMO LEO Satellite Communications},
booktitle = {IEEE International Conference on Communications (ICC)},
year = {2022},
author = {Joan Palacios and Nuria Gonz{\'a}lez-Prelcic and Carlos Mosquera}
}
@article {1048,
title = {Efficient protocols for oblivious linear function evaluation from ring-LWE},
journal = {Journal of Computer Security},
volume = {30},
year = {2022},
month = {01/2022},
pages = {40},
chapter = {39},
issn = {0926-227X},
doi = {10.3233/JCS-200116},
author = {Carsten Baum and Daniel Escudero and Alberto Pedrouzo-Ulloa and Peter Scholl and Juan Ram{\'o}n Troncoso-Pastoriza}
}
@article {1027,
title = {Flexible User Mapping for Radio Resource Assignment in Advanced Satellite Payloads},
journal = {IEEE Transactions on Broadcasting},
year = {2022},
author = {Tom{\'a}s Ram{\'\i}rez and Carlos Mosquera and Nader Alagha}
}
@article {1024,
title = {Full-duplex mmWave MIMO with finite-resolution phase shifters},
journal = {IEEE Trans. Wireless Communications},
volume = {21},
year = {2022},
month = {11/2022},
pages = {8979-8994},
abstract = {Spectral precoding and windowing are two effective approaches to reduce out-of-band radiation (OBR) in multicarrier systems. Their performance comes at the price of reduced throughput and additional computational complexity, so there is strong motivation for simultaneously using both techniques. We present a novel design that jointly optimizes the precoder and window coefficients to minimize radiated power within a user-selectable frequency region. Results show that the proposed design achieves a better OBR/throughput/complexity tradeoff than either of these individual techniques separately.
}, keywords = {rodin, spectrum shaping}, doi = {10.1109/LCOMM.2022.3203521}, author = {Khawar Hussain and R. L{\'o}pez-Valcarce} } @conference {1025, title = {Orthogonal precoding with memory for sidelobe suppression in OFDM}, booktitle = {European Signal Processing Conference (EUSIPCO)}, year = {2022}, abstract = {Orthogonal precoding is a very effective approach to reduce out-of-band radiation (OBR) in multicarrier systems in order to avoid adjacent channel interference. This is achieved at the cost of introducing precoder redundancy, which results in throughput loss. Introducing memory in the precoding operation has the potential to improve performance without sacrificing additional spectral efficiency, in exchange for extra computational complexity. We present a novel orthogonal memory precoder which minimizes OBR within a user-selectable frequency region and allows for controlling spectral overshoot. Decision-feedback decoding avoids symbol error rate degradation at the receiver.}, keywords = {rodin, spectrum shaping}, author = {Khawar Hussain and R. L{\'o}pez-Valcarce} } @conference {1049, title = {Secure Collaborative Camera Attribution}, booktitle = { European Interdisciplinary Cybersecurity Conference (EICC)}, year = {2022}, pages = {97-98}, publisher = {ACM}, organization = {ACM}, address = {Barcelona, Spain}, isbn = {978-1-4503-9603-5}, doi = {https://doi.org/10.1145/3528580.3532993}, author = {Alberto Pedrouzo-Ulloa and Fernando P{\'e}rez-Gonz{\'a}lez and David V{\'a}zquez-Pad{\'\i}n} } @article {1032, title = {The SIMO Block Rayleigh Fading Channel Capacity Scaling With Number of Antennas, Bandwidth, and Coherence Length}, journal = {IEEE Journal on Selected Areas in Information Theory}, volume = {3}, year = {2022}, pages = {54{\textendash}68}, doi = {10.1109/JSAIT.2022.3157519}, author = {Gomez-Cuba, Felipe} } @conference {996, title = {Analog beamforming for full-duplex mmWave communication with low-resolution phase shifters}, booktitle = {IEEE International Conference on Communications (ICC)}, year = {2021}, month = {06/2021}, address = {Montreal, Canada (Virtual event)}, abstract = {
Although active interference cancellation (AIC) is an appealing approach to reduce out-of-band radiation (OBR) in multicarrier systems without distorting data subcarriers, it usually requires a large number of reserved subcarriers to be effective. Introducing memory in AIC precoding may help alleviate this drawback in exchange for some increase in computational complexity. We propose a novel memory AIC precoder which, in contrast to previous schemes, minimizes OBR within a user-selectable frequency region and allows for controlling spectral overshoot.
}, keywords = {rodin, spectrum shaping}, author = {Khawar Hussain and R. L{\'o}pez-Valcarce} } @article {1018, title = {Multiquadratic rings and oblivious linear function evaluation}, journal = {TEMat monogr{\'a}ficos}, volume = {2}, year = {2021}, pages = {83-86}, issn = {2660-6003}, url = {https://temat.es/monograficos/article/view/vol2-p83}, author = {Alberto Pedrouzo-Ulloa} } @conference {1005, title = {Non-Orthogonal Transmission Under Flexible Illumination Patterns For Advanced Satellite Payloads}, booktitle = {38th International Communications Satellite Systems Conference (ICSSC),}, year = {2021}, address = {Washington DC, USA}, author = {Tom{\'a}s Ram{\'\i}rez and Carlos Mosquera and Nader Alagha} } @conference {1074, title = {PRNU-leaks: facts and remedies}, booktitle = {2020 28th European Signal Processing Conference (EUSIPCO)}, year = {2021}, pages = {720-724}, keywords = {Degradation, estimation, Europe, Fingerprint, Fingerprint recognition, forensics, information theory, Leakage, Membership inference, privacy, PRNU, Signal processing}, doi = {10.23919/Eusipco47968.2020.9287451}, url = {https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=9287451}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and Fern{\'a}ndez-Mendui{\~n}a, Samuel} } @conference {1001, title = {A Review of "Camera Attribution Forensic Analyzer in the Encrypted Domain"}, booktitle = {VI Jornadas Nacionales de Investigaci{\'o}n en Ciberseguridad (JNIC)}, year = {2021}, publisher = {Ediciones de la Universidad de Castilla-La Mancha}, organization = {Ediciones de la Universidad de Castilla-La Mancha}, author = {Alberto Pedrouzo-Ulloa and Miguel Masciopinto and Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {1000, title = {Revisiting multivariate ring learning with errors and its applications on lattice-based cryptography}, journal = {Mathematics}, volume = {9}, year = {2021}, chapter = {858}, author = {Alberto Pedrouzo-Ulloa and Juan Ram{\'o}n Troncoso-Pastoriza and Nicolas Gama and Mariya Georgieva and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {997, title = {Space-Time Rate Splitting for the MISO BC with Magnitude CSIT}, journal = {IEEE Transactions on Communications}, year = {2021}, author = {Carlos Mosquera and Nele Noels and Tom{\'a}s Ram{\'\i}rez and M{\`a}rius Caus and Adriano Pastore} } @article {1017, title = {Adam and the Ants: On the Influence of the Optimization Algorithm on the Detectability of DNN Watermarks}, volume = {22}, year = {2020}, month = {12/2020}, pages = {36}, doi = { https://doi.org/10.3390/e22121379}, url = {https://www.mdpi.com/1099-4300/22/12/1379}, author = {Corti{\~n}as-Lorenzo, Betty and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {999, title = {Efficient Protocols for Oblivious Linear Function Evaluation from Ring-LWE}, booktitle = {International Conference on Security and Cryptography for Networks (SCN)}, year = {2020}, publisher = {Springer}, organization = {Springer}, author = {Carsten Baum and Daniel Escudero and Alberto Pedrouzo-Ulloa and Peter Scholl and Juan Ram{\'o}n Troncoso-Pastoriza} } @conference {990, title = {Energy-efficient analog beamforming with short packets in millimeter-wave MIMO systems}, booktitle = {2020 54th Asilomar Conference on Signals, Systems, and Computers, California, 2020}, year = {2020}, address = {Virtual event}, abstract = {Index Modulations, in the form of Spatial Modulation or Polarized Modulation, are gaining traction for both satellite and terrestrial next generation communication systems. Adaptive Spatial Modulation based links are needed to fully exploit the transmission capacity of time-variant channels. The adaptation of code and/or modulation requires a real-time evaluation of the channel achievable rates. Some existing results in the literature present a computational complexity which scales quadratically with the number of transmit antennas and the constellation order. Moreover, the accuracy of these approximations is low and it can lead to wrong Modulation and Coding Scheme selection. In this work we apply a Multilayer Feedforward Neural Network to compute the achievable rate of a generic Index Modulation link. The case of two antennas/polarizations is analyzed in depth, showing not only a one-hundred fold decrement of the Mean Square Error in the estimation of the capacity as compared with existing analytical approximations, but also a fifty times reduction of the computational complexity. Moreover, the extension to an arbitrary number of antennas is explained and supported with simulations. More generally, neural networks can be considered as promising candidates for the practical estimation of complex metrics in communication related settings.
}, keywords = {ACM, Adaptive Communications, Capacity, Index Modulation, link adaptation, Machine Learning, MFNN, Mutual Information, neural networks, Polarized Modulation, Spatial Modulation}, isbn = {1558-0857 }, issn = {0090-6778 }, doi = {https://doi.org/10.1109/TCOMM.2020.2974215}, author = {Anxo Tato and Carlos Mosquera and Pol Henarejos and Ana P{\'e}rez Neira} } @conference {987, title = {Non-coherent rate-splitting for multibeam satellite forward link: practical coding and decoding algorithms}, booktitle = {IEEE 91st Vehicular Technology Conference (VTC2020-Spring), 25-28 May 2020, virtual event.}, year = {2020}, author = {Nele Noels and Marc Moeneclaey and Tom{\'a}s Ram{\'\i}rez and Carlos Mosquera and M{\`a}rius Caus and Adriano Pastore} } @conference {981, title = {Optimal window design for W-OFDM}, booktitle = {IEEE Int. Conf. Acoustics, Speech and Signal Processing (ICASSP)}, year = {2020}, month = {05/2020}, abstract = {The Variation of Prediction Footprint (VPF), formerly used in video forensics for double compression detection and GOP size estimation, is comprehensively investigated to improve its acquisition capabilities and extend its use to video sequences that contain bi-directional frames (B-frames). By relying on a universal rate-distortion analysis applied to a generic double compression scheme, we first explain the rationale behind the presence of the VPF in double compressed videos and then justify the need of exploiting a new source of information such as the motion vectors, to enhance the VPF acquisition process. Finally, we describe the shifted VPF induced by the presence of B-frames and detail how to compensate the shift to avoid misguided GOP size estimations. The experimental results show that the proposed Generalized VPF (G-VPF) technique outperforms the state of the art, not only in terms of double compression detection and GOP size estimation, but also in reducing computational time.
}, keywords = {B-frames, double compression detection, GOP size estimation, rate distortion optimization, video forensics}, author = {David V{\'a}zquez-Pad{\'\i}n and Marco Fontani and Dasara Shullani and Fernando P{\'e}rez-Gonz{\'a}lez and Alessandro Piva and Mauro Barni} } @conference {961, title = {Analog beamforming for full-duplex millimeter wave communication}, booktitle = {16th International Symposium on Wireless Communication Systems (ISWCS)}, year = {2019}, month = {08/2019}, address = {Oulu, Finland}, abstract = {Full-duplex (FD) communication has the potential for significant improvements in spectral efficiency, as long as the problem of self-interference (SI) can be overcome. For millimeter wave (mmWave) systems with large antenna arrays, beamforming based SI mitigation is attractive because of the large number of degrees of freedom available. Previously proposed precoder-combiner designs, however, suffer from a large performance loss under the hardware-constrained architectures required for operation at mmWave. In this context, we develop a new algorithm for the design of constant-amplitude analog precoders and combiners of an FD mmWave single-stream bidirectional link, significantly reducing the aforementioned performance loss.
}, keywords = {full-duplex, mmWave, winter}, author = {R. L{\'o}pez-Valcarce and Nuria Gonz{\'a}lez-Prelcic} } @conference {962, title = {Beamformer design for full-duplex amplify-and-forward millimeter wave relays}, booktitle = {16th International Symposium on Wireless Communication Systems (ISWCS)}, year = {2019}, month = {08/2019}, address = {Oulu, Finland}, abstract = {We consider the design of Amplify \& Forward Full-Duplex (FD) relay-assisted communication systems. The FD mode has potential for significant improvements in spectral efficiency, but it suffers from large self-interference (SI) levels.
Beamforming-based SI mitigation is attractive for millimeter wave (mmWave) systems due to the large number of degrees of freedom available with large antenna arrays. We first develop an all-digital beamformer design by imposing a zero-forcing constraint on SI, performing quasi-optimally in terms of spectral efficiency. The design is then modified to fit the hardware-related constraints usually found when operating at mmWave, so that the beamformers can be implemented in the analog domain by using phase shifters, with an acceptable performance loss.
}, keywords = {full-duplex, mmWave, winter}, author = {R. L{\'o}pez-Valcarce and Nuria Gonz{\'a}lez-Prelcic} } @article {1043, title = {Capacity scaling in a non-coherent wideband massive SIMO block fading channel}, journal = {IEEE Transactions on Wireless Communications}, volume = {18}, year = {2019}, pages = {5691{\textendash}5704}, doi = {10.1109/TWC.2019.2938519}, author = {Gomez-Cuba, Felipe and Chowdhury, Mainak and Manolakos, Alexandros and Erkip, Elza and Goldsmith, Andrea J} } @conference {964, title = {Deep Learning Assisted Rate Adaptation in Spatial Modulation Links}, booktitle = {16th International Symposium on Wireless Communication Systems (ISWCS)}, year = {2019}, address = {Oulu (Finland)}, abstract = {The adaptation of Spatial Modulation based links to the channel conditions is challenged by the complicated dependence between performance (either error rate metrics or theoretically achievable rates) and the multiple antenna channel description. In this paper a coding rate selection mechanism is presented based on a carefully selected set of channel features and the proper training of a deep neural network, which all together can satisfy a given error rate bound.
}, keywords = {Deep Learning, link adaptation, Machine Learning, Spatial Modulation}, author = {Anxo Tato and Carlos Mosquera} } @conference {971, title = {Dynamic Attribute-Based Privacy-Preserving Genomic Susceptibility Testing}, booktitle = {34th Annual ACM Symposium on Applied Computing, SAC 2019}, year = {2019}, month = {04/2019}, address = {Limassol, Cyprus}, author = {Mina Namazi and Cihan Eryonucu and Erman Ayday and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {973, title = {Efficient PRNU Matching in the Encrypted Domain}, booktitle = {XoveTIC}, year = {2019}, publisher = {MDPI}, organization = {MDPI}, address = {A Coru{\~n}a, Spain}, keywords = {camera attribution forensic analyzer, digital media forensics, lattice-based cryptosystems, Photoresponse Non-Uniformity}, author = {Alberto Pedrouzo-Ulloa and Miguel Masciopinto and Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez} } @inbook {956, title = {Expectation{\textendash}maximisation based distributed estimation in sensor networks}, booktitle = {Data Fusion in Wireless Sensor Networks: A statistical signal processing perspective}, year = {2019}, pages = {201-230}, publisher = {The Institution of Engineering and Technology (IET)}, organization = {The Institution of Engineering and Technology (IET)}, chapter = {9}, address = {London, UK}, abstract = {Estimating the unknown parameters of a statistical model based on the observations collected by a sensor network is an important problem with application in multiple fields. In this setting, distributed processing, by which computations are carried out within the network in order to avoid raw data transmission to a fusion centre, is a desirable feature resulting in improved robustness and energy savings. In the presence of incomplete data, the expectation-maximisation (EM) algorithm is a popular means to iteratively compute the maximum likelihood (ML) estimate. It has found application in diverse fields such as computational biology, anomaly detection, speech segmentation, reinforcement learning, and motion estimation, among others. In this chapter we will review the formulation of the centralised EM estimation algorithm as a starting point and then discuss distributed versions well suited for implementation in sensor networks. The first class of these distributed versions requires specialised routing through the network in terms of a linear or circular path visiting all nodes, whereas the second class does away with this requirement by using the concept of network consensus to diffuse information through the network. Our focus will be on a relevant sensor network application, in which the parameter of a linear model is to be estimated in the presence of an unknown number of randomly malfunctioning sensors.
}, keywords = {winter, wsn}, isbn = {978-1-78561-584-9}, author = {R. L{\'o}pez-Valcarce and Alba Pag{\`e}s-Zamora} } @conference {969, title = {Flexible spectral precoding for OFDM systems}, booktitle = {2nd XoveTIC Conference}, year = {2019}, month = {09/2019}, address = {A Coru{\~n}a (Spain)}, abstract = {Spectral precoding is a popular approach to reduce out-of-band radiation (OBR) in multicarrier systems in order to avoid adjacent channel interference. Since precoding will introduce signal distortion, appropriate decoding is required at the receiver side. We present a novel linear precoder design with flexibility to trade off OBR reduction, precoding/decoding complexity, and error rate at the receiver. The precoding matrices have low rank, which translates into significant computational savings. In this way, the requirements of different systems can be satisfied with varying complexity levels.
}, keywords = {spectrum shaping, winter}, doi = {10.1109/ICASSP.2019.8683162}, author = {Khawar Hussain and Ana Lojo and R. L{\'o}pez-Valcarce} } @conference {957, title = {Frequency-selective hybrid precoding and combining for mmWave MIMO systems with per-antenna power constraints}, booktitle = {IEEE Int. Conf. Acoustics, Speech and Signal Processing (ICASSP)}, year = {2019}, month = {04/2019}, pages = {4794-4798}, publisher = {IEEE}, organization = {IEEE}, address = {Brighton, UK}, abstract = {Configuring hybrid precoders and combiners is the main challenge to be solved to operate at millimeter wave (mmWave) frequencies. The use of hybrid architectures imposse hardware constraints on the analog precoder that need to be carefully dealt with. In this paper, we develop hybrid precoders and combiners aiming at minimizing the Euclidean distance with respect to the approximate all-digital precoders and combiners maximizing the spectral efficiency under per-antenna power constraints. Numerical results demonstrate the effectiveness of the proposed design method, whose performance is close to that of the all-digital solution.
}, keywords = {mmWave, winter}, doi = {10.1109/ICASSP.2019.8683831}, author = {Javier Rodr{\'\i}guez-Fern{\'a}ndez and R. L{\'o}pez-Valcarce and Nuria Gonz{\'a}lez-Prelcic} } @mastersthesis {983, title = {Homomorphic Lattice Cryptosystems for Secure Signal Processing}, year = {2019}, school = {University of Vigo}, address = {Vigo}, author = {Alberto Pedrouzo-Ulloa} } @article {970, title = {Improving PRNU Compression Through Preprocessing, Quantization, and Coding}, journal = {IEEE Transactions on Information Forensics and Security}, volume = {14}, year = {2019}, month = {03/2019}, pages = {13}, chapter = {608}, author = {L. Bondi and P. Bestagini and Fernando P{\'e}rez-Gonz{\'a}lez and S. Tubaro} } @mastersthesis {979, title = {Link Adaptation Techniques for Future Terrestrial and Satellite Communications}, year = {2019}, month = {2019}, pages = {1-247}, abstract = {The increasing demand of access to data from the users and the enormous number of connected devices requires to enhance the capacity of the wireless networks. They must provide a higher throughput to serve all the requested traffic and they must accommodate the vast number of the Internet of the Things (IoT) devices. In this context, this thesis focus its attention on three different scenarios which have in common that they are a future evolution of current terrestrial and satellite communications systems. These scenarios are Mobile Satellite Systems (MSS), Fixed Satellite Systems (FSS) and next generation 5G networks.
The adoption of Dual Polarization (DP) in MSS along with Multiple Input Multiple Output (MIMO) signal processing techniques allows to double the capacity of previous systems with the same bandwidth and transmit power. On the other hand, the shift to more aggressive frequency reuse patterns in FSS can also provide remarkable gains in the capacity of High Throughput Satellites (HTS) for offering BroadBand Satellite Services (BBS). Linear precoding stands out as a technique to cope with the high level of interference which arises in this scenario. Lastly, energy efficient modulation schemes, like Spatial Modulation (SM) and its many variants, are being proposed for increasing the capacity of future 5G networks since they represent a good trade-off between spectral efficiency, energy efficiency and transmitter complexity.\ \ \
Adaptive Coding and Modulation (ACM) technology is omnipresent in most of the communication standards since it enables a better exploitation of the system capacity by means of the adaptation of the Modulation and Coding Scheme (MCS). The link adaptation algorithm is responsible for selecting the optimum MCS, as well as other physical layer parameters in some cases, to adapt the transmission bit rate according to the instantaneous channel capacity of the time variant channel. Thus, link adaptation algorithms permit to increase the spectrum efficiency and guarantee a robust communication, adapting the level of redundancy of the coded information bits and the ruggedness of the modulation scheme.
In this thesis, several link adaptation algorithms are proposed for the three considered scenarios and its effectiveness is supported with simulations. Furthermore, an experimental validation of some algorithms is provided using a real satellite link, implemented with Software Defined Radio (SDR) technology. It is also studied how the carrier detection errors in the Channel State Information (CSI) affect linear precoding in FSS. The errors in the users Signal to Interference and Noise Ratio (SINR) that the gateway calculates to allocate MCS to the users is analyzed statistically and geographically. Moreover, a link adaptation algorithm with an adaptive margin per user is shown to allow a robust communication in the presence of SINR errors whereas the throughput of the system is barely compromised. In addition, a new method for making capacity calculations in SM and Generalized SM systems based on a neural network is proposed, which improves both accuracy and computational complexity with regard to the existing analytical approximations in the literature. With regard to MSS using DP, an adaptation mechanism is proposed in order to select the optimum MIMO mode and MCS which offer the highest throughput. Simulation results in a maritime mobile satellite channel show the dependence of the optimum MIMO mode with the average Signal to Noise Ratio (SNR), and how the spectral efficiency can be maximized whereas a target outage probability can be guaranteed. Lastly, the adaptation in SM systems is also addressed and several methods for deciding the coding rate in SM are given. These include the computation of the capacity prior to\ the adaptation, and also the use of a deep neural network. The latter offers very good results, with a spectral efficiency very close to the maximum achievable value.
In practice, data gathered by wireless sensor networks often belongs in a low-dimensional subspace, but it can present missing as well as corrupted values due to sensor malfunctioning and/or malicious attacks. We study the problem of Maximum Likelihood estimation of the low-rank factors of the underlying structure in such situation, and develop an Expectation-Maximization algorithm to this purpose, together with an effective initialization scheme. The proposed method outperforms previous schemes based on an initial faulty sensor identification stage, and is competitive in terms of complexity and performance with convex optimization-based matrix completion approaches.
}, keywords = {winter, wsn}, author = {R. L{\'o}pez-Valcarce and Josep Sala} } @article {948, title = {Maximally stationary window design for overlap-add based random vibration synthesis}, journal = {Mechanical Systems and Signal Processing}, volume = {122}, year = {2019}, month = {05/2019}, pages = {642-657}, abstract = {Generalized Spatial Modulation (GSM) is being considered for future high-capacity and energy efficient terrestrial networks. A variant such as Polarized Modulation (PMod) has also a role in Dual Polarization Mobile Satellite Systems. The implementation of adaptive GSM systems requires fast methods to evaluate the channel dependent GSM capacity, which amounts to solve multi-dimensional integrals without closed-form solutions. For this purpose, we propose the use of a Multilayer Feedforward Neural Network and an associated feature selection algorithm. The resulting method is highly accurate and with much lower complexity than alternative numerical methods.
}, keywords = {Generalized Spatial Modulation, Index Modulations, Machine Learning, Multilayer Feedforward Neural Network, Polarized Modulation}, author = {Anxo Tato and Carlos Mosquera and Pol Henarejos and Ana P{\'e}rez-Neira} } @conference {959, title = {OFDM spectral precoding with per-subcarrier distortion constraints}, booktitle = {European Signal Processing Conference (EUSIPCO)}, year = {2019}, month = {09/2019}, address = {A Coru{\~n}a, Spain}, abstract = {In video forensics, the study of the prediction residue across successive frames is key to verify the integrity of digital videos. Focusing on an MPEG-2 double compression scheme, we analyze how the variance of the prediction residue evolves during the second compression depending on the type of frame (either I or P) employed in the first encoding and exploring different compression strengths and deadzone widths for quantization. This analysis reveals that the width of the quantizer deadzones actually affects the performance of existing methods based on the Variation of Prediction Footprint (VPF) for double compression detection and Group Of Pictures (GOP) size estimation. The predicted behavior from the theoretical characterization of the prediction residue is confirmed through experimental results with real video sequences.
}, keywords = {double compression detection, GOP size estimation, MPEG-2, prediction residue analysis, video forensics}, author = {David V{\'a}zquez-Pad{\'\i}n and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {974, title = {Rethinking Location Privacy for Unknown Mobility Behaviors}, booktitle = {IEEE European Symposium on Security and Privacy (EuroS\&P)}, year = {2019}, author = {Simon Oya and Carmela Troncoso and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {972, title = {Revisiting Multivariate Lattices for Encrypted Signal Processing}, booktitle = {ACM Information Hiding and Multimedia Security Workshop (IH\&MMSec)}, year = {2019}, publisher = {ACM}, organization = {ACM}, address = {Paris, France}, keywords = {homomorphic encryption, Lattice-Based Cryptography, Multidimensional Signal Processing, Secure Signal Processing}, author = {Alberto Pedrouzo-Ulloa and Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez} } @proceedings {968, title = {Solving self-interference issues in a Full-Duplex radio transceiver}, journal = {2nd XoveTIC Conference}, year = {2019}, month = {09/2019}, address = {A Coru{\~n}a (Spain)}, abstract = {Mutual Information is the metric that is used to perform link adaptation, which allows to achieve rates near capacity. The computation of adaptive transmission modes is achieved by employing the mapping between the Signal to Noise Ratio and the Mutual Information. Due to the high complexity of the computation of the Mutual Information, this process is performed off-line via Monte Carlo simulations, whose results are stored in look-up tables. However, in Index Modulations, such as Spatial Modulation or Polarized Modulation, this is not feasible since the constellation and the Mutual Information are channel dependent and it would require to compute this metric at each time instant if the channel is time varying. In this paper, we propose different approximations in order to obtain a simple closed-form expression that allows to compute the Mutual Information at each time instant and thus, making feasible the link adaptation.
}, author = {Pol Henarejos and Ana P{\'e}rez-Neira and Anxo Tato and Carlos Mosquera} } @article {935, title = {Distributed Precoding Systems in Multi-Gateway Multibeam Satellites: Regularization and Coarse Beamforming}, journal = {IEEE Transactions on Wireless Communication}, year = {2018}, author = {Carlos Mosquera and R. L{\'o}pez-Valcarce and Tom{\'a}s Ram{\'\i}rez and Vahid Joroughi} } @conference {936, title = {Exploratory Analysis of Superposition Coding and Rate Splitting for Multibeam Satellite Systems}, booktitle = {15th International Symposium on Wireless Communication Systems (ISWCS)}, year = {2018}, address = { Lisbon, Portugal}, author = {M{\`a}rius Caus and Adriano Pastore and M{\`o}nica Navarro and Tom{\'a}s Ram{\'\i}rez and Carlos Mosquera and Nele Noels and Nader Alagha and Ana I. Perez-Neira} } @conference {944, title = {Link Adaptation and Carriers Detection Errors in Multibeam Satellite Systems with Linear Precoding}, booktitle = {9th Advanced Satellite Multimedia Systems Conference (ASMS) and 15th Signal Processing for Space Communications Workshop (SPSC)}, year = {2018}, address = {Berlin, Germany}, abstract = {The application of linear precoding at the gateway side enables broadband multibeam satellite systems to use more aggressive frequency reuse patterns increasing the overall capacity of future High Throughput Satellites (HTS). However, although some previous works about precoding consider imperfect CSIT (Chanel State Information at the Transmitter) adding some CSI estimation errors, that is not the main cause of CSI degradation. In practice, receivers can only detect and estimate a few coefficients of the CSI vector being the other nullified, replaced by zeros. This introduces errors in the SINR calculation by the gateway that lead to the assignment of Modulation and Coding Schemes (MCS) over the decoding possibilities of the users, increasing the rate of erroneous frames. In this work, the errors in the SINR calculation caused by the nullification of the CSI are analyzing statistically and geographically using a radiation diagram of 245 beams over Europe. Furthermore, a solution based on a link adaptation algorithm with a per user adaptive margin is proposed, helping to achieve the QEF (Quasi-error Free) target of DVB-S2X systems.
\
We address the problem of distributed estimation of a vector-valued parameter performed by a wireless sensor network in the presence of noisy observations which may be unreliable due to faulty transducers. The proposed distributed estimator is based on the Expectation-Maximization (EM) algorithm and combines consensus and diffusion techniques: a term for information diffusion is gradually turned off, while a term for updated information averaging is turned on so that all nodes in the network approach the same value of the estimate. The proposed method requires only local exchanges of information among network nodes and, in contrast with previous approaches, it does not assume knowledge of the a priori probability of transducer failures or the noise variance. A convergence analysis is provided, showing that the convergent points of the centralized EM iteration are locally asymptotically convergent points of the proposed distributed scheme. Numerical examples show that the distributed algorithm asymptotically attains the performance of the centralized EM method.
}, keywords = {winter, wsn}, doi = {10.1016/j.sigpro.2017.10.012}, url = {https://authors.elsevier.com/a/1W90XbZX4rsob}, author = {Silvana Silva Pereira and R. L{\'o}pez-Valcarce and Alba Pag{\`e}s-Zamora} } @conference {934, title = {Practical Implementation of Link Adaptation with Dual Polarized Modulation (Best paper award)}, booktitle = {11th International Symposium on Communication Systems, Networks, and Digital Signal Processing.}, year = {2018}, author = {Anxo Tato and Carlos Mosquera and Pol Henarejos and Ana P{\'e}rez-Neira} } @conference {940, title = {Putting the PRNU Model in Reverse Gear: Findings with Synthetic Signals}, booktitle = {European Signal Processing Conference (EUSIPCO)}, year = {2018}, month = {2018}, address = {Rome, Italy}, author = {Miguel Masciopinto and Fernando P{\'e}rez-Gonz{\'a}lez} } @proceedings {946, title = {Software Defined Radio: A Brief Introduction}, journal = {XoveTIC Congress}, year = {2018}, month = {09/2018}, publisher = {MDPI}, address = {A Coru{\~n}a, Spain}, abstract = {In this short article the concept of Software Defined Radio (SDR) is introduced and compared with the traditional radio. Then, a research project of atlanTTic center which used this technology was briefly presented and lastly, we include a reference to some dissemination
activities related with SDR to be developed shortly.
We consider the forward link of a multibeam satellite system with high spectral reuse and the novel low-complexity transmission and detection strategies from ["{\textquotedblleft}Exploratory analysis of superposition coding and rate splitting for multibeam satellite systems", ISWCS 2018]. More specifically, we study the impact of a time offset between the antenna beams that cooperate to simultaneously serve a given user. Assuming Gaussian signaling, we provide closed-form expressions for the achievable rate region. It is demonstrated that, in the absence of timing information at the gateway, this region is not affected by a time offset. Our numerical results further show that, in case timing is known at the gateway, an offset of half a symbol period at both user terminals is optimal in terms of spectral efficiency.
}, author = {Nele Noels and Marc Moeneclaey and Tom{\'a}s Ram{\'\i}rez and Carlos Mosquera and M{\`a}rius Caus and Adriano Pastore} } @article {941, title = {Testing equality of multiple power spectral density matrices}, journal = {IEEE Trans. Signal Processing}, volume = {66}, year = {2018}, month = {12/2018}, pages = {6268-6280}, keywords = {cognitive radio, winter}, doi = { 10.1109/TSP.2018.2875884}, author = {David Ram{\'\i}rez and Daniel Romero and Javier V{\'\i}a and R. L{\'o}pez-Valcarce and Ignacio Santamar{\'\i}a} } @conference {930, title = {Two-Level Precoding for High Throughput Satellites with non-Cooperative Gateways}, booktitle = {22nd International Workshop on Smart Antennas (WSA)}, year = {2018}, author = {Tom{\'a}s Ram{\'\i}rez and Carlos Mosquera and Roberto L{\'o}pez-Valcarce} } @conference {906, title = {Back to the Drawing Board: Revisiting the Design of Optimal Location Privacy-preserving Mechanisms}, booktitle = {ACM Conference on Computer and Communications Security (CCS)}, year = {2017}, author = {Simon Oya and Carmela Troncoso and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {1036, title = {Bit allocation for increased power efficiency in 5G receivers with variable-resolution ADCs}, booktitle = {2017 Information Theory and Applications Workshop (ITA)}, year = {2017}, month = {feb}, pages = {1{\textendash}7}, keywords = {5G mobile communication, analogue-digital conversio}, author = {b. Abbas, W and Gomez-Cuba, F and Zorzi, M} } @article {871, title = {CDMA-based Acoustic Local Positioning System for Portable Devices with Multipath Cancellation}, journal = {Digital Signal Processing}, volume = {62}, year = {2017}, month = {03/2017}, pages = {38-51}, abstract = {The use of dual polarization in mobile satellite systems is
very promising as a means for increasing the transmission capacity. In this paper a system which uses simultaneously two orthogonal polarizations in order to communicate with the users is studied. The application of MIMO signal processing techniques along with Adaptive Coding and Modulation in the forward link can provide remarkable throughput gains up to 100 \% when compared with the single polarization system. The gateway is allowed to vary the MIMO and Modulation\ and Coding Schemes for each frame. The selection is done by means of a link adaptation algorithm which uses a tunable margin to achieve a predefined target Frame Error Rate.
\ The stochastic representation of digital images through a two-dimensional autoregressive (2D-AR) model offers a proper way to approximate the empirical distribution of the eigenvalues coming from genuine images. By considering this model, we apply random matrix theory to analytically derive the asymptotic eigenvalue distribution of causal 2D-AR random fields that have undergone an upscaling operation with a particular interpolation kernel. This eigenvalue characterization is useful in developing new forensic techniques for image resampling detection since we can use theoretical bounds to drive the decision of detectors based on subspace decomposition. Moreover, experimental results with real images show that the obtained asymptotic limits turn out to be excellent approximations, even when working with images of small size.
}, keywords = {Multimedia security, winter}, author = {David V{\'a}zquez-Pad{\'\i}n and Fernando P{\'e}rez-Gonz{\'a}lez and Pedro Comesa{\~n}a} } @conference {876, title = {Robust clustering of data collected via crowdsourcing}, booktitle = {IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)}, year = {2017}, month = {03/2017}, pages = {4014 - 4018}, address = {New Orleans}, abstract = {Crowdsourcing approaches rely on the collection of multiple individuals to solve problems that require analysis of large data sets in a timely accurate manner. The inexperience of participants or annotators motivates well robust techniques. Focusing on clustering setups, the data provided by all annotators is suitably modeled here as a mixture of Gaussian components plus a uniformly distributed random variable to capture outliers. The proposed algorithm is based on the expectation-maximization algorithm and allows for soft assignments of data to clusters, to rate annotators according to their performance, and to estimate the number of Gaussian components in the non-Gaussian/Gaussian mixture model, in a jointly manner.
}, keywords = {winter, wsn}, doi = {10.1109/ICASSP.2017.7952910}, author = {Alba Pag{\`e}s-Zamora and Georgios Giannakis and R. L{\'o}pez-Valcarce and Pere Gimenez-Febrer} } @conference {883, title = {Secure Genomic Susceptibility Testing based on Lattice Encryption}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2017}, publisher = {IEEE}, organization = {IEEE}, address = {New Orleans, USA}, keywords = {adversarial signal processing, compass, Genomic Privacy, homomorphic encryption, Lattice-Based Cryptography, Privacy Protection}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Alberto Pedrouzo-Ulloa and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {895, title = {Smart Detection of Line-Search Oracle Attacks}, journal = {IEEE Transactions on Information Forensics and Security}, volume = {12}, year = {2017}, month = {03/2017}, pages = {588-603}, chapter = {588}, author = {Tondi, Benedetta and Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez and Barni, Mauro} } @article {905, title = {Statistical detection of JPEG traces in digital images in uncompressed formats}, journal = {IEEE Transactions on Information Forensics and Security}, volume = {12}, year = {2017}, author = {Cecilia Pasquini and Giulia Boato and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {888, title = {Technical Report UV-TSC-DVP-19042017: Derivation of the Asymptotic Eigenvalue Distribution for Causal 2D-AR Models under Upscaling}, year = {2017}, institution = {University of Vigo}, issn = {UV-TSC-DVP-19042017}, author = {David V{\'a}zquez-Pad{\'\i}n and Fernando P{\'e}rez-Gonz{\'a}lez and Pedro Comesa{\~n}a} } @conference {924, title = {Time-domain channel estimation for wideband millimeter wave systems with hybrid architecture}, booktitle = { IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2017}, month = {03/2017}, pages = {6193-6197}, abstract = {Millimeter wave (mm Wave) systems will likely employ large antennas at both the transmitter and receiver for directional beamforming. Hybrid analog/digital MIMO architectures have been proposed previously for leveraging both array gain and multiplexing gain, while reducing the power consumption in analog-to-digital converters. Channel knowledge is needed to design the hybrid precoders/combiners, which is difficult to obtain due to the large antenna arrays and the frequency selective nature of the channel. In this paper, we propose a sparse recovery based time-domain channel estimation technique for hybrid architecture based frequency selective mmWave systems. The proposed compressed sensing channel estimation algorithm is shown to provide good estimation error performance, while requiring small training overhead. The simulation results show that using multiple RF chains at the receiver and the transmitter further reduces the training overhead.
}, keywords = {compass, mmWave, myrada}, author = {Kiran Venugopal and Ahmed Alkhateeb and Robert W. Heath Jr. and Nuria Gonz{\'a}lez-Prelcic} } @article {838, title = {Wideband full-duplex MIMO relays with blind adaptive self-interference cancellation}, journal = {Signal Processing}, volume = {130}, year = {2017}, month = {01/2017}, pages = {74-85}, chapter = {74}, abstract = {Data-injection attacks on spatial field detection corrupt a subset of measurements to cause erroneous decisions. We consider a centralized decision scheme exploiting spatial field smoothness to overcome lack of knowledge on system parameters such as noise variance. We obtain closed-form expressions for system performance and investigate strategies for an intruder injecting false data in a fraction of the sensors in order to reduce the probability of detection. The problem of determining the most vulnerable subset of sensors is also analyzed.
}, keywords = {adversarial signal processing, compass, wsn}, author = {R. L{\'o}pez-Valcarce and Daniel Romero} } @article {837, title = {Design of pool mixes against profiling attacks in real conditions}, journal = {IEEE/ACM Transactions on Networking}, volume = {24}, year = {2016}, month = {12/2016}, pages = {3662-3675}, keywords = {adversarial signal processing, compass}, doi = {10.1109/TNET.2016.2547391}, author = {Simon Oya and Fernando P{\'e}rez-Gonz{\'a}lez and Carmela Troncoso} } @article {850, title = {Designing incoherent frames through convex techniques for optimized compressed sensing}, journal = {IEEE Transactions on Signal Processing}, volume = {64}, year = {2016}, month = {May/2016}, pages = {2334-2344}, chapter = {2334}, keywords = {compass, compressed sensing}, author = {Cristian Rusu and Nuria Gonz{\'a}lez-Prelcic} } @mastersthesis {830, title = {Detection of Image Resampling and Video Encoding Footprints for Forensic Applications}, year = {2016}, month = {01/2016}, school = {University of Vigo}, address = {Vigo}, author = {David V{\'a}zquez-Pad{\'\i}n} } @conference {845, title = {Distributed multivariate regression with unknown noise covariance in the presence of outliers: a minimum description length approach}, booktitle = {IEEE Workshop on Statistical Signal Processing (SSP)}, year = {2016}, address = {Palma de Mallorca, Spain}, abstract = {Millimeter communication systems use large antenna arrays to provide good average received power and to take advantage of multi-stream MIMO communication. Unfortunately, due to power consumption in the analog front-end, it is impractical to perform beamforming and fully digital precoding at baseband. Hybrid precoding/combining architectures have been proposed to overcome this limitation. The hybrid structure splits the MIMO processing between the digital and analog domains, while keeping the performance close to that of the fully digital solution. In this paper, we introduce and analyze several algorithms that efficiently design hybrid precoders and combiners starting from the known optimum digital precoder/combiner, which can be computed when perfect channel state information is available. We propose several low complexity solutions which provide different trade-offs between performance and complexity. We show that the proposed iterative solutions perform better in terms of spectral efficiency and/or are faster than previous methods in the literature. All of them provide designs which perform close to the known optimal digital solution. Finally, we study the effects of quantizing the analog component of the hybrid design and show that even with coarse quantization, the average rate performance is good.
}, keywords = {compass, mmWave}, doi = {10.1109/TWC.2016.2614495}, author = {Cristian Rusu and Roi M{\'e}ndez-Rial and Nuria Gonz{\'a}lez-Prelcic and Robert W. Heath Jr.} } @article {866, title = {Multiantenna GLR detection of rank-one signals with known power spectral shape under spatially uncorrelated noise}, journal = {IEEE Transactions on Signal Processing}, volume = {64}, year = {2016}, month = {12/2016}, pages = {6269-6283}, chapter = {6269}, abstract = {We establish the generalized likelihood ratio (GLR) test for a Gaussian signal of known power spectral shape and unknown rank-one spatial signature in additive white Gaussian noise with an unknown diagonal spatial correlation matrix. This is motivated by spectrum sensing problems in dynamic spectrum access (DSA), in which the temporal correlation of the primary signal can be assumed known up to a scaling, and where the noise is due to an uncalibrated receive array. For spatially independent identically distributed (i.i.d.) noise, the corresponding GLR test reduces to a scalar optimization problem, whereas the GLR detector in the general non-i.i.d. case yields a more involved expression, which can be computed via alternating optimization methods. Low signal-to-noise ratio (SNR) approximations to the detectors are given, together with an asymptotic analysis showing the influence on detection performance of the signal power spectrum and SNR distribution across antennas. Under spatial rank-P conditions, we show that the rank-one GLR detectors are consistent with a statistical criterion that maximizes the output energy of a beamformer operating on filtered data. Simulation results support our theoretical findings in that exploiting prior knowledge on the signal power spectrum can result in significant performance improvement.
}, keywords = {cognitive radio, compass}, issn = {1053-587X}, doi = {10.1109/TSP.2016.2601290}, author = {Josep Sala and Gonzalo V{\'a}zquez-Vilar and R. L{\'o}pez-Valcarce and Saeid Sedighi and Abbas Taherpour} } @conference {847, title = {Online EM-based distributed estimation in sensor networks with faulty nodes}, booktitle = {European Signal Processing Conference (EUSIPCO)}, year = {2016}, month = {09/2016}, address = {Budapest, Hungary}, abstract = {Communication at millimeter wave (mmWave) frequencies is defining a new era of wireless communication. The mmWave band offers higher bandwidth communication channels versus those presently used in commercial wireless systems. The applications of mmWave are immense: wireless local and personal area networks in the unlicensed band, 5G cellular systems, not to mention vehicular area networks, ad hoc networks, and wearables. Signal processing is critical for enabling the next generation of mmWave communication. Due to the use of large antenna arrays at the transmitter and receiver, combined with radio frequency and mixed signal power constraints, new multiple-input multiple-output (MIMO) communication signal processing techniques are needed. Because of the wide bandwidths, low complexity transceiver algorithms become important. There are opportunities to exploit techniques like compressed sensing for channel estimation and beamforming. This article provides an overview of signal processing challenges in mmWave wireless systems, with an emphasis on those faced by using MIMO communication at higher carrier frequencies.
}, keywords = {compass, mmWave}, doi = {10.1109/JSTSP.2016.2523924}, author = {Robert W. Heath Jr. and Nuria Gonz{\'a}lez-Prelcic and Sundeep Rangan and Wonil Roh and Akbar M. Sayeed} } @article {852, title = {Properties of real and complex ETFs and their application to the design of low coherence frames}, journal = {Linear Algebra and its Applications}, volume = {508}, year = {2016}, month = {November, 2016}, pages = {81-90}, url = {http://www.sciencedirect.com/science/article/pii/S0024379516302555}, author = {Cristian Rusu and Nuria Gonz{\'a}lez-Prelcic and Robert W. Heath Jr.} } @conference {859, title = {Radar aided mmWave beam alignment in V2I communications supporting antenna diversity}, booktitle = {Information Theory and Applications Workshop (ITA}, year = {2016}, month = {January, 2016}, keywords = {compass, mmWave}, author = {Nuria Gonz{\'a}lez-Prelcic and R. M{\'e}ndez-Rial and R.W. Heath Jr.} } @conference {858, title = {Robust analog precoding designs for millimeter wave MIMO transceivers}, booktitle = {20th International ITG Workshop on Smart Antennas (WSA)}, year = {2016}, month = {March, 2016}, keywords = {compass, mmWave}, author = {Pengfei Xia and Robert Heath and Nuria Gonz{\'a}lez-Prelcic} } @article {927, title = {Robust analog precoding designs for millimeter wave MIMO transceivers with frequency and time division duplexing}, journal = {IEEE Trans. Communications}, volume = {64}, year = {2016}, month = {11/2016}, pages = {4622 - 4634}, abstract = {Millimeter wave (mmWave) communication provides high data rates thanks to large arrays at the transmitter and receiver, coupled with large bandwidth channels. Exploiting the arrays is challenging due to the need to configure precoding at the transmitter based on the large frequency selective channel. In this paper, we exploit the power iteration principle and propose a robust analog precoding training algorithm that can be applied in both frequency division duplex transmission systems and time division duplex transmission systems with or without RF calibration. We further analyze the convergence of the proposed algorithm and show how it converges to the singular value decomposition optimality exponentially. We propose null space projection on top of the power iteration to form multiple orthogonal beams at the transmitter and receiver. Strongest tap selection with proper energy pruning is used to collect as much precoding gain as possible from a frequency selective fading channel. The exponential effective SINR mapping performance is evaluated and demonstrates that the overall approach works smoothly. Numerical simulation results demonstrate algorithm robustness and the algorithm works not only for the simplified mmWave directional channels, but also for more general rich scattering channels.
}, keywords = {compass, mmWave}, doi = {10.1109/TCOMM.2016.2604312}, author = {Pengfei Xia and Robert W. Heath Jr. and Nuria Gonz{\'a}lez-Prelcic} } @article {853, title = {Security in automotive radar and vehicular networks}, journal = {Microwave Journal}, year = {2016}, keywords = {compass, mmWave}, author = {E. R. Yeh and J. Choi and Nuria Gonz{\'a}lez-Prelcic and C. Bhat and R. W. Heath Jr.} } @article {832, title = {Technical Report for ID TNET-2015-00294 {\textquotedblleft}Optimal delay characteristic when the number of users is comparable to the number of rounds"}, year = {2016}, author = {Simon Oya and Fernando P{\'e}rez-Gonz{\'a}lez and Carmela Troncoso} } @article {865, title = {Technical Report TSC/SO/24082016: Filter design for delay-based anonymous communications}, year = {2016}, author = {Simon Oya and Fernando P{\'e}rez-Gonz{\'a}lez and Carmela Troncoso} } @conference {856, title = {The use of unit norm tight measurement matrices for one-bit compressed sensing}, booktitle = {IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)}, year = {2016}, month = {2016}, abstract = {In this paper we analyze the mean squared error (MSE) for one-bit compressed sensing schemes based on measurement matrices that correspond to unit norm tight frames. We show that, as in the unquantized case, sensing with unit norm tight frames improves the MSE in the reconstruction of sparse vectors from one-bit measurements using l1\ and thresholding algorithms. From our analytical and experimental results we conclude that when implementing one-bit compressed sensing schemes with fixed measurement matrices unit norm tight frames are the measurements of choice
}, keywords = {compass, compressed sensing}, author = {C. Rusu and Nuria Gonz{\'a}lez-Prelcic and R. W. Heath Jr.} } @conference {839, title = {Wideband self-interference cancellation for better spectrum use}, booktitle = {IEEE WoWMoM 2016 Workshop on Fifth Generation Wireless}, year = {2016}, month = {06/2016}, keywords = {adaptive signal processing, compass, full duplex}, author = {Carlos Mosquera} } @conference {863, title = {Adaptive hybrid precoding and combining in mmWave multiuser MIMO systems based on compressed covariance estimation}, booktitle = {IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP)}, year = {2015}, month = {December, 2015}, keywords = {compass, mmWave}, author = {R. M{\'e}ndez-Rial and Nuria Gonz{\'a}lez-Prelcic and R. W. Heath Jr.} } @conference {861, title = {Adaptive one-bit compressive sensing with application to low-precision receivers at mmWave}, booktitle = {IEEE Global Telecommunications Conf. (GLOBECOM), }, year = {2015}, month = {December, 2015}, keywords = {compass, mmWave}, author = {C. Rusu and R. M{\'e}ndez-Rial and Nuria Gonz{\'a}lez-Prelcic and R. W. Heath, Jr} } @article {1045, title = {On the analysis of scheduling in dynamic duplex multi-hop mmWave cellular systems}, journal = {IEEE Transactions on Wireless Communications}, volume = {14}, year = {2015}, month = {jun}, pages = {6028 {\textendash} 6042}, author = {Garc{\'\i}a-Rois, Juan and Gomez-Cuba, Felipe and Akdeniz, Mustafa Riza and Gonz{\'a}lez-Casta{\~n}o, Francisco Javier and Burguillo-Rial, Juan Carlos and Rangan, Sundeep and Lorenzo, Beatriz} } @conference {815, title = {Attack detectors for data aggregation in clustered sensor networks}, booktitle = {European Signal Processing Conf. (EUSIPCO)}, year = {2015}, month = {accepted}, pages = {2098-2102}, publisher = {EURASIP}, organization = {EURASIP}, address = {Nice, France}, abstract = {Antenna subset modulation (ASM) is a physical layer security technique that is well suited for millimeter wave communication systems. The key idea is to vary the radiation pattern at the symbol rate by selecting one from a subset of patterns with a similar main lobe and different side lobes. This paper shows that ASM is not robust to an eavesdropper that makes multiple simultaneous measurements at multiple angles. The measurements are combined and used to formulate an estimation problem to undo the effects of the side lobe randomization. Simulations show the performance of the estimation algorithms and how the eavesdropper can effectively recover the information if the signal-to-noise ratio exceeds a certain threshold. Using fewer active radio frequency chains makes it harder for the attacker to recover the transmit symbol, at the expense of more grating lobes.
}, keywords = {adversarial signal processing, compass, mmWave}, author = {Cristian Rusu and Nuria Gonz{\'a}lez-Prelcic and Robert W. Heath Jr.} } @conference {817, title = {Augmented covariance estimation with a cyclic approach in DOA}, booktitle = {IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)}, year = {2015}, month = {04/2015}, pages = {2784-2788}, publisher = {IEEE}, organization = {IEEE}, address = {Brisbane, Australia}, abstract = {High resolution direction-of-arrival (DOA) estimation is an important problem in many array signal processing applications. This paper proposes an augmented covariance estimator for DOA estimation. The new method exploits the periodicity of the covariance lags when the DOAs are assumed on a discrete grid with a certain resolution. Then, it achieves twice the resolution of typical methods such as the direct augmentable approach or forward backward spatial smoothing. When the sources are not on the discrete grid, an interpolated array manifold technique is proposed to mitigate the grid mismatch error.
}, keywords = {DOA estimation, Non-uniformly spaced arrays}, author = {Roi M{\'e}ndez-Rial and Nuria Gonz{\'a}lez-Prelcic and Robert W. Heath Jr.} } @conference {1033, title = {{Bandwidth occupancy of non-coherent wideband fading channels}}, booktitle = {IEEE International Symposium on Information Theory (ISIT)}, year = {2015}, author = {Gomez-Cuba, Felipe and Du, Jinfeng and M{\'e}dard, Muriel and Erkip, Elza} } @conference {804, title = {Blind Satellite Inter-Gateway Interference Mitigation}, booktitle = {IEEE International Conference on Communications (ICC)}, year = {2015}, month = {2015}, keywords = {compass, satcom}, author = {J. Arnau and C. Mosquera} } @conference {1035, title = {Capacity scaling in noncoherent wideband massive SIMO systems}, booktitle = {IEEE Information Theory Workshop (ITW)}, year = {2015}, month = {apr}, author = {Chowdhury, Mainak and Manolakos, Alexandros and Gomez-Cuba, Felipe and Erkip, Elza and Goldsmith, Andrea J} } @article {770, title = {Compression Limits for Random Vectors with Linearly Parameterized Second-Order Statistics}, journal = {IEEE Trans. Information Theory}, volume = {61}, year = {2015}, month = {03/2015}, pages = {1410-1425}, chapter = {1410}, abstract = {We present techniques to improve convergence speed of distributed average consensus algorithms in wireless sensor networks by means of topology design. A broadcast network is assumed, so that only the transmit power of each node can be independently controlled, rather than each individual link. Starting with a maximally connected configuration in which all nodes transmit at full power, the proposed methods successively reduce the transmit power of a chosen node in order to remove one and only one link; nodes are greedily selected either in order to yield fastest convergence at each step, or if they have the largest degree in the network. These greedy schemes provide a good complexity-performance tradeoff with respect to full-blown global search methods. As a side benefit, improving the convergence speed also results in savings in energy consumption with respect to the maximally connected setting.
}, keywords = {compass, wsn}, doi = {10.1016/j.ipl.2014.11.009}, author = {Massimo Vecchio and R. L{\'o}pez-Valcarce} } @article {756, title = {Improving Area Coverage of Wireless Sensor Networks Via Controllable Mobile Nodes: a Greedy Approach}, journal = {Journal of Network and Computer Applications}, volume = {48}, year = {2015}, month = {02/2015}, pages = {1-13}, abstract = {This work proposes a novel method to estimate the Line-of-Sight Time-of-Flights (LOS-TOFs) in a broadband acoustic local positioning system (ALPS) with strong multipath interference. The proposed method is based on the Matching Pursuit channel estimation algorithm that provides a low complexity approximation to the Maximum Likelihood solution for sparse channels. A multichannel version of this algorithm has been implemented to estimate a minimum of three coefficients in the channel responses of a particular ALPS, composed of four beacons that perform the simultaneous emission of BPSK modulated 255-bit Kasami codes. A statistical analysis of performance has been carried out by using a set of test signals synthetically generated to simulate different positions and reflection coefficients of the environment. The results of this analysis show the enhanced capability of the proposed method to estimate the LOS-TOFs under strong multipath interference, with respect to that of a classical system based on correlation + thresholding.
}, keywords = {compass, wsn}, doi = {10.1109/WISP.2015.7139174}, author = {Fernando J. Alvarez and R. L{\'o}pez-Valcarce} } @conference {777, title = {Multivariate Lattices for Encrypted Image Processing}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing}, year = {2015}, month = {04/2015}, publisher = {IEEE}, organization = {IEEE}, address = {Brisbane, Australia}, keywords = {homomorphic encryption, lattice cryptography, SPED}, author = {Alberto Pedrouzo-Ulloa and Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {822, title = {Pushing for higher rates and efficiency in Satcom: the different perspectives within SatNExIV}, booktitle = {Twelfth International Symposium on Wireless Communication Systems (ISWCS)}, year = {2015}, address = {Brussels}, keywords = {satcom}, author = {Miguel {\'A}ngel V{\'a}zquez and Ana P{\'e}rez Neira and Carlos Mosquera and Bhavani Shankar and Pol Henarejos and Athanasios Panagopoulos and Giovanni Giambene and Vasilios Siris and George Polyzos and Nader Alagha} } @conference {807, title = {Robust Adaptive Coding and Modulation Scheme for the Mobile Satellite Forward Link}, booktitle = {IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC}, year = {2015}, keywords = {compass, satcom}, author = {Alberto Rico-Alvari{\~n}o and Anxo Tato and Carlos Mosquera} } @conference {810, title = {Spectrum Cartography using quantized observations}, booktitle = {IEEE Int. Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2015}, month = {04/2015}, publisher = {IEEE}, organization = {IEEE}, address = {Brisbane, Australia}, abstract = {Active interference cancellation (AIC) is a multicarrier spectrum sculpting technique which reduces the power of undesired out-of-band emissions by adequately modulating a subset of reserved cancellation subcarriers. In most schemes online complexity is a concern, and thus cancellation subcarriers have traditionally been constrained to linear combinations of the data subcarriers. Recent AIC designs truly minimizing out-of-band emission shift complexity to the offline design stage, motivating the consideration of more general mappings to improve performance. We show that there is no loss in optimality incurred by constraining these mappings to the set of linear functions.
\
}, keywords = {cognitive radio, compass, dynacs, spectrum shaping}, doi = {10.1109/LCOMM.2014.2338316}, author = {Schmidt, J.F. and Daniel Romero and R. L{\'o}pez-Valcarce} } @conference {734, title = {Antenna competition to boost Active Interference Cancellation in cognitive MIMO-OFDM}, booktitle = {IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM)}, year = {2014}, address = {A Coru{\~n}a, Spain}, abstract = {Active Interference Cancellation (AIC) techniques for OFDM spectrum sculpting have gained interest over the last years, and several extensions to the MIMO case have been recently proposed. However, these designs do not fully exploit the spatial diversity provided by the multiple transmit antennas, as canceler allocation is fixed. This paper proposes a more general mechanism for the allocation of the cancellation subcarriers across antennas in order to better exploit spatial diversity. In particular, we present a novel AIC design for cognitive MIMOOFDM systems, in which transmit antennas compete against each other for a fixed number of cancellation subcarriers. We show that this more general allocation approach results in significant performance improvements with respect to previous designs.}, keywords = {cognitive radio, dynacs, spectrum shaping}, doi = {10.1109/SAM.2014.6882392}, author = {Schmidt, J.F. and R. L{\'o}pez-Valcarce} } @conference {730, title = {Are you threatening me? Towards smart detectors in watermarking}, booktitle = {Media Watermarking, Security, and Forensics}, year = {2014}, month = {02/2014}, publisher = {SPIE}, organization = {SPIE}, address = {San Francisco, CA, USA}, keywords = {adversarial signal processing, watermarking}, doi = {10.1117/12.2036415}, author = {Mauro Barni and Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez and Benedetta Tondi} } @conference {750, title = {Balancing Closed and Open Loop CSI in Mobile Satellite Link Adaptation}, booktitle = {Proc. ASMS \& SPSC}, year = {2014}, address = {Livorno, Italy}, keywords = {dynacs, satcom}, doi = {10.1109/ASMS-SPSC.2014.6934548}, author = {Alberto Rico-Alvari{\~n}o and Arnau, Jesus and Carlos Mosquera} } @conference {758, title = {A Benford-Fourier JPEG compression detector}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2014}, address = {Paris, France}, keywords = {compass, forensics}, doi = {10.1109/ICIP.2014.7026077}, author = {Cecilia Pasquini and Fernando P{\'e}rez-Gonz{\'a}lez and Giulia Boato} } @conference {761, title = {Bootstrap-based Proxy Reencryption for Private Multi-user Computing}, booktitle = {IEEE International Workshop on Information Forensics and Security (WIFS)}, year = {2014}, month = {12/2014}, publisher = {IEEE}, organization = {IEEE}, address = {Atlanta, GA}, keywords = {SPED}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Serena Caputo} } @conference {771, title = {Channel estimation in millimeter wave MIMO systems with one-bit quantization}, booktitle = {Asilomar Conf. on Signals, Systems and Computers}, year = {2014}, keywords = {adaptive signal processing, compass, mmWave}, doi = {10.1109/ACSSC.2014.7094595}, author = {Jianhua Mo and Phil Schniter and Nuria Gonz{\'a}lez-Prelcic and Robert W. Heath Jr.} } @conference {765, title = {Circular Sparse Rulers Based On Co-prime Sampling For Compressive Power Spectrum Estimation}, booktitle = {IEEE Global Communications Conference}, year = {2014}, month = {12/2014}, publisher = {IEEE}, organization = {IEEE}, address = {Austin, TX}, keywords = {cognitive radio, compass, compressed sensing}, doi = {10.1109/GLOCOM.2014.7037272}, author = {Nuria Gonz{\'a}lez-Prelcic and M. E. Dom{\'\i}ngez-Jim{\'e}nez} } @mastersthesis {742, title = {Cognitive and Signal Processing Techniques for Improved Spectrum Exploitation in Wireless Communications}, year = {2014}, school = {Universidade de Vigo}, address = {Vigo}, keywords = {cognitive radio, satcom}, author = {Alberto Rico-Alvari{\~n}o} } @conference {762, title = {Cooperative compressive power spectrum estimation}, booktitle = {IEEE Sensor Array Multichannel Signal Process. Workshop (SAM)}, year = {2014}, keywords = {cognitive radio, wsn}, author = {Dyonisius D Ariananda and Daniel Romero and Geert Leus} } @conference {753, title = {Detecting Misreporting Attacks to the Proportional Fair Scheduler}, booktitle = {IEEE Workshop on Information Forensics and Security (WIFS)}, year = {2014}, month = {12/2014}, address = {Atlanta, USA}, abstract = {Current multibeam satellite systems consist of a very large number of spot beams. In this paper, we analyze them from the large scale MIMO perspective, and establish a comparison with massive MIMO systems. It will be shown that the large number of beams has important operational implications, and that it simplifies the analysis because it allows using asymptotic results. However, it will also be shown that multibeam satellite systems cannot be considered massive MIMO systems.
}, keywords = {dynacs, large-scale analysis, Massive MIMO, multibeam satellites, Multiuser detection, satcom}, doi = {ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=6843099}, author = {Arnau, Jesus and Carlos Mosquera} } @conference {731, title = {Distributed Total Least Squares Estimation over Networks}, booktitle = {IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)}, year = {2014}, address = {Florence, Italy}, abstract = {We consider Total Least Squares (TLS) estimation in a network in which each node has access to a subset of equations of an overdetermined linear system. Previous distributed approaches require that the number of equations at each node be larger than the dimension L of the unknown parameter. We present novel distributed TLS estimators which can handle as few as a single equation per node. In the first scheme, the network computes an extended correlation matrix via standard iterative average consensus techniques, and the TLS estimate is extracted afterwards by means of an eigenvalue decomposition (EVD). The second scheme is EVD-free, but requires that a linear system of size L be solved at each iteration by each node. Replacing this step by a single Gauss-Seidel subiteration is shown to be an effective means to reduce computational cost without sacrificing performance.
}, keywords = {dynacs, wsn}, doi = {10.1109/ICASSP.2014.6855074}, author = {R. L{\'o}pez-Valcarce and Silvana Silva Pereira and Alba Pag{\`e}s-Zamora} } @conference {747, title = {Do dummies pay off? Limits of dummy traffic protection in anonymous communications}, booktitle = {Privacy Enhancing Technologies Symposium}, year = {2014}, keywords = {anonymous communications, compass, disclosure attacks, dummies}, author = {Simon Oya and Carmela Troncoso and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {726, title = {FER prediction with variable codeword length}, booktitle = {ICASSP2014 - Signal Processing for Communications and Networking (ICASSP2014 - SPCOM)}, year = {2014}, address = {Florence, Italy}, abstract = {Frame error rate (FER) prediction in wireless communication systems is an important tool with applications to system level simulations and link adaptation, among others. Although in realistic communication scenarios it is expected to have codewords of different lengths, previous work on FER prediction marginally treated the dependency of the FER on the codeword length. In this paper, we present a method to estimate the FER using codewords of different length. We derive a low complexity FER estimator for frames of different length transmitted over a binary symmetric channel of unknown error probability. We extend this technique to coded systems by the use of effective SNR FER predictors. The proposed estimation scheme is shown to outperform other simpler estimation methods.
}, keywords = {adaptive signal processing, compass, dynacs, Effective SNR, FER prediction, PHY abstraction}, doi = {10.1109/ICASSP.2014.6853935}, author = {Alberto Rico-Alvari{\~n}o and Robert W. Heath Jr. and Carlos Mosquera} } @conference {736, title = {Flat Fading Channel Estimation Based on Dirty Paper Coding}, booktitle = {IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)}, year = {2014}, address = {Florence, Italy}, abstract = {A novel complex flat fading channel estimation scheme is proposed. Contrarily to previous schemes in the literature, this new approach is not based on introducing pilot sequences, but on reducing the \ interference caused by the information-bearing signal on the estimation-aiding signal by using Dirty Paper Coding. \ We show through simulations that our method outperforms the \ Partially-Data Dependent scheme, which is a state-of-the-art technique based on superimposed pilots.\
}, keywords = {channel estimation, dirty paper coding, dynacs, superimposed pilots}, doi = {10.1109/ICASSP.2014.6854852}, author = {Gabriel Dom{\'\i}nguez-Conde and Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {733, title = {How to Implement Doubly-Stochastic Matrices for Consensus-Based Distributed Algorithms}, booktitle = {IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM)}, year = {2014}, address = {A Coru{\~n}a, Spain}, abstract = {Millimeter-wave communication is one way to alleviate the spectrum gridlock at lower frequencies while simultaneously providing high-bandwidth communication channels. MmWave makes use of MIMO through large antenna arrays at both the base station and the mobile station to provide sufficient received signal power. This article explains how beamforming and precoding are different in MIMO mmWave systems than in their lower-frequency counterparts, due to different hardware constraints and channel characteristics. Two potential architectures are reviewed: hybrid analog/digital precoding/combining and combining with low-resolution analog- to-digital converters. The potential gains and design challenges for these strategies are discussed, and future research directions are highlighted.
}, keywords = {adaptive signal processing, compass, mmWave}, doi = {10.1109/MCOM.2014.6979963}, author = {Ahmed Alkhateeb and Jianhua Mo and Nuria Gonz{\'a}lez-Prelcic and Robert W. Heath Jr.} } @conference {757, title = {Multiple JPEG compression detection by means of Benford-Fourier coefficients}, booktitle = {IEEE International Workshop on Information Forensics and Security (WIFS)}, year = {2014}, month = {12/2014}, address = {Atlanta, GA}, author = {Cecilia Pasquini and Giulia Boato and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {740, title = {Nearly-Optimal Compression Matrices for Signal Power Estimation}, booktitle = {IEEE Int. Workshop on Signal Processing Advances in Wireless Communications (SPAWC)}, year = {2014}, address = {Toronto, Canada}, keywords = {cognitive radio, dynacs}, doi = {10.1109/SPAWC.2014.6941849}, author = {Daniel Romero and R. L{\'o}pez-Valcarce} } @conference {754, title = {A New Look At ML Step-Size Estimation for Scalar Costa Scheme Data Hiding}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2014}, address = {Paris, France}, author = {Gabriel Dom{\'\i}nguez-Conde and Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @mastersthesis {749, title = {Neyman-Pearson Decision in Traffic Analysis}, year = {2014}, school = {University of New Mexico}, type = {PhD Thesis}, address = {Albquerque, NM, USA}, author = {Juan A. Elices} } @conference {727, title = {OFDM spectrum sculpting with active interference cancellation: Keeping spectral spurs at bay}, booktitle = {IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)}, year = {2014}, month = {05/2014}, pages = {1-5}, publisher = {IEEE}, organization = {IEEE}, address = {Florence, Italy}, keywords = {cognitive radio, dynacs, spectrum shaping}, doi = {10.1109/ICASSP.2014.6855169}, author = {Schmidt, J.F. and R. L{\'o}pez-Valcarce} } @mastersthesis {778, title = {On-Ground Processing for Spectral Efficiency Improvement in Next Generation Satellite Communications}, year = {2014}, school = {Universidade de Vigo}, type = {PhD thesis}, address = {Vigo, Spain}, abstract = {Rain attenuation is among the major impairments for satellite systems operating in the K band and above. In this paper, we investigate the impact of spatially correlated rain attenuation on the performance of a multibeam satellite return link. For a comprehensive assessment, an analytical model for the antenna pattern that generates the beams is also proposed. We focus on the outage capacity of the link, and obtain analytical approximations at high and low SNR. The derived approximations provide insights on the effect of key system parameters {\textendash} like the inter-user distance, the satellite beam radius, or the rain intensity{\textendash} and simulation results show that it fits tightly to the Monte Carlo results. Additionally, the derived expressions can be easily particularized for the single-user case, providing some novel insights.
}, keywords = {Antennas, Approximation methods, Attenuation, Correlation, dynacs, Rain, satcom, Satellites, Signal to noise ratio}, doi = {10.1109/TWC.2014.2329682}, author = {Arnau, Jesus and Christopoulos, D. and Chatzinotas, S. and C. Mosquera and Ottersten, B.} } @conference {763, title = {Power spectrum blind sampling using optimal multicoset sampling patterns in the MSE sense}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2014}, keywords = {cognitive radio, dynacs}, doi = {10.1109/ICASSP.2014.6853758}, author = {Bamrung TauSiesakul and Nuria Gonz{\'a}lez-Prelcic} } @conference {1044, title = {Practical Smart Grid Traffic Management in Leased Internet Access Networks}, booktitle = {IEEE International Energy Conference (ENERGYCON)}, year = {2014}, abstract = {We demonstrate the practical implementation of a schema for Smart Grid Last Mile (SGLM) traffic management in leased Internet access networks, based on well-known queue management and traffic marking algorithms such as Random Early Drop and Token Bucket. Internet access links are often over-provisioned, with much higher installed capacity than user needs, so domestic applications do not compete for bandwidth. In this scenario the additional load posed by SGLM traffic is negligible. On some occasions, however, Internet access links are moder- ately stressed and traffic management techniques are required for SGLM traffic to coexist seamlessly with user traffic. In a previous paper, we formulated a theoretical model for SGLM traffic in general networks, and a management solution for its coexistence with user traffic in the particular case of leased Internet access networks. In the present paper, we demonstrate the feasibility of that solution in a practical scenario. We have implemented the traffic management policies on real hardware and employed SGLM traffic generators to evaluate our schema in a real network. The results indicate that our proposal achieves low- latency SGLM communications in a scenario with high domestic user traffic
}, author = {Gomez-Cuba, Felipe and Gonz{\'a}lez-Casta{\~n}o, Francisco Javier and P{\'e}rez-Garrido, Carlos P.} } @conference {1037, title = {Scaling laws for infrastructure single and multihop wireless networks in wideband regimes}, booktitle = {IEEE International Symposium on Information Theory (ISIT)}, year = {2014}, pages = {76{\textendash}80}, address = {Honolulu}, abstract = {With millimeter wave bands emerging as a strong candidate for 5G cellular networks, next-generation systems may be in a unique position where spectrum is plentiful. To assess the potential value of this spectrum, this paper derives scaling laws on the per mobile downlink feasible rate with large bandwidth and number of nodes, for both Infrastructure Single Hop (ISH) and Infrastructure Multi-Hop (IMH) architectures. It is shown that, for both cases, there exist \emph{critical bandwidth scalings} above which increasing the bandwidth no longer increases the feasible rate per node. These critical thresholds coincide exactly with the bandwidths where, for each architecture, the network transitions from being degrees-of-freedom-limited to power-limited. For ISH, this critical bandwidth threshold is lower than IMH when the number of users per base station grows with network size. This result suggests that multi-hop transmissions may be necessary to fully exploit large bandwidth degrees of freedom in deployments with growing number of users per cell.
}, author = {Gomez-Cuba, Felipe and Rangan, Sundeep and Erkip, Elza} } @conference {764, title = {Sensitivity of compressive sensing architectures based on time interleaved analog-to-digital converters to channel mismatches}, booktitle = {IEEE International New Circuits and Systems Conference (NEWCAS)}, year = {2014}, keywords = {dynacs}, doi = {10.1109/NEWCAS.2014.6933981}, author = {Roi M{\'e}ndez-Rial and J.M. Caurel-Carrera and Nuria Gonz{\'a}lez-Prelcic} } @conference {732, title = {SINR Optimization in Wideband Full-Duplex MIMO Relays under Limited Dynamic Range}, booktitle = {IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM)}, year = {2014}, address = {A Coru{\~n}a, Spain}, keywords = {adaptive signal processing, compass, full duplex}, doi = {10.1109/SAM.2014.6882369}, author = {Emilio Antonio-Rodr{\'\i}guez and R. L{\'o}pez-Valcarce and Taneli Riihonen and Stefan Werner and Risto Wichman} } @article {735, title = {Spectrum Sensing for Wireless Microphone Signals using Multiple Antennas}, journal = {IEEE Trans. on Vehicular Technology}, volume = {63}, year = {2014}, month = {11/2014}, pages = {4395-4407}, chapter = {4395}, abstract = {Spectrum sensors for cognitive radio are expected to deploy multiple antennas in order to overcome the noise uncertainty problem and minimize the effects of small-scale fading. Despite the requirement that these sensors must detect wireless microphone (WM) signals, works in the literature have focused either on general purpose multiantenna detectors, or single antenna WM detectors. We exploit the spatial structure and particular properties of WM waveforms to derive four multiantenna detectors for WM signals with different performance/ complexity tradeoffs. These detectors are based on the generalized likelihood ratio test, which is derived under several signal models exploiting either the fact that the bandwidth of a WM signal never exceeds 200 kHz, the property that these signals have a constant magnitude, or both. The proposed detectors do not require synchronization with the WM signal and are robust to the noise uncertainty problem as well as to small-scale fading. Using the simulation guidelines from the IEEE 802.22 standard, the novel multiantenna WM detectors are shown to outperform previous schemes, thus demonstrating the advantages of exploiting spatial correlation along with WM signal structure.}, keywords = {cognitive radio, dynacs}, doi = {10.1109/TVT.2014.2316513}, author = {Daniel Romero and R. L{\'o}pez-Valcarce} } @article {728, title = {Technical Report TSC/FPG/20032014: Performance Analysis of the Least Squares Disclosure Attack with Time-Varying User Behavior}, year = {2014}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and Carmela Troncoso and Simon Oya} } @article {738, title = {Technical Report TSC/SO/02052014: Derivation of the Mean Squared Error of the Least Squares Estimator in a Timed Pool Mix with Dummy Traffic}, year = {2014}, author = {Simon Oya and Carmela Troncoso and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {752, title = {Technical Report UV/TSC/APU/02102014: Multivariate Ring Learning with Errors}, year = {2014}, institution = {University of Vigo}, issn = {UV/TSC/APU/02102014}, author = {Alberto Pedrouzo-Ulloa and Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {729, title = {Transportation-theoretic image counterforensics to first significant digit histogram forensics}, booktitle = {IEEE International Conference on Audio, Speech, and Signal Processing (ICASSP)}, year = {2014}, month = {05/2014}, publisher = {IEEE}, organization = {IEEE}, address = {Florence, Italy}, author = {Cecilia Pasquini and Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {760, title = {Understanding the Effects of Real-World Behavior in Statistical Disclosure Attacks}, booktitle = {IEEE Workshop on Information Forensics and Security}, year = {2014}, author = {Simon Oya and Carmela Troncoso and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {693, title = {Adaptive Self-interference Cancellation in Wideband Full-Duplex Decode-and-Forward MIMO Relays}, booktitle = {IEEE 14th Int. Workshop on Signal Processing Advances in Wireless Communications (SPAWC)}, year = {2013}, month = {06/2013}, address = {Darmstadt, Germany}, keywords = {adaptive signal processing, dynacs, full duplex}, doi = {10.1109/SPAWC.2013.6612074}, author = {Emilio Antonio-Rodr{\'\i}guez and R. L{\'o}pez-Valcarce and Taneli Riihonen and Stefan Werner and Risto Wichman} } @conference {697, title = {Analytical Characterization of the Single Frequency Network Gain Using Effective SNR Metrics}, booktitle = {The Tenth International Symposium on Wireless Communication Systems 2013 (ISWCS 2013)}, year = {2013}, address = {Ilmenau, Germany}, abstract = {The design of broadcasting networks operating in a single frequency way is challenging due to the difficulty of predicting the performance in a frequency selective channel, caused by natural multipath and echoes coming from different transmitters. In this paper we resort to the use of frame error rate prediction metrics (also known as effective SNR metrics) to characterize the performance gain (or loss) under different multipath and SNR regimes in a simplified scenario with two transmitters. The analysis shows clearly that receivers with a dominant line of sight reception and high SNR are more sensitive to the presence of echoes, while those users in low SNR or strong multipath conditions are easily enforced by the insertion of a second transmitter.
}, keywords = {broadcasting, dynacs, Effective SNR metrics, Single Frequency Network}, author = {Alberto Rico-Alvari{\~n}o and C. Mosquera} } @conference {687, title = {Autocorrelation-based adaptation rule for feedback equalization in Wideband Full-Duplex Amplify-and-Forward MIMO relays}, booktitle = {Int. Conf. Acoust., Speech, Signal Process. (ICASSP)}, year = {2013}, abstract = {\ Private communications inside large vehicles such as ships may be effectively provided using standard cellular systems. In this paper we propose a new solution based on software-defined radio with electromagnetic sensing support. Software-defined radio allows low-cost developments and, potentially, added-value services not available in commercial cellular networks. The platform of reference, OpenBTS, only supports single-channel cells. Our proposal, however, has the ability of changing BTS channel frequency without disrupting ongoing communications. This ability should be mandatory in vehicular environments, where neighbouring cell configurations may change rapidly, so a moving cell must be reconfigured in real-time to avoid interferences. Full details about frequency occupancy sensing and the channel reselection procedure are provided in this paper. Moreover, a procedure for fast terminal detection is proposed. This may be decisive in emergency situations, e.g., if someone falls overboard. Different tests confirm the feasibility of our proposal and its compatibility with commercial GSM terminals.
}, keywords = {cognitive radio, dynacs, mobile communications, SDR, vehicular communications}, doi = {10.3390/s130202051}, author = {J. Mu{\~n}oz and J. Vales-Alonso and F. Qui{\~n}oy-Garc{\'\i}a and Costas-Sanz, S. and M. Pillado and F.J. Gonz{\'a}lez-Casta{\~n}o and M. Garc{\'\i}a-Sanchez and R. L{\'o}pez-Valcarce and C. L{\'o}pez-Bravo} } @conference {725, title = {Compressive Angular and Frequency Periodogram Reconstruction for Multiband Signals}, booktitle = {IEEE Int. Workshop Comput. Advances Multi-Sensor Adaptive Process (CAMSAP)}, year = {2013}, address = {San Martin}, keywords = {cognitive radio, dynacs}, doi = {10.1109/CAMSAP.2013.6714102}, author = {Ariananda, D. D. and Daniel Romero and Geert Leus} } @conference {681, title = {Compressive Covariance Sampling}, booktitle = {Inform. Theory Appl. Workshop}, year = {2013}, month = {Feb.}, pages = {1-8}, keywords = {cognitive radio, dynacs}, doi = {10.1109/ITA.2013.6502949}, author = {Daniel Romero and Geert Leus} } @conference {685, title = {Compressive wideband spectrum sensing with spectral prior information}, booktitle = {Int. Conf. Acoust., Speech, Signal Process. (ICASSP)}, year = {2013}, abstract = {We address the problem of distributed estimation of a parameter from a set of noisy observations collected by a sensor network, assuming that some sensors may be subject to data failures and report only noise. In such scenario, simple schemes such as the Best Linear Unbiased Estimator result in an error floor in moderate and high signal-to-noise ratio (SNR), whereas previously proposed methods based on hard decisions on data failure events degrade as the SNR decreases. Aiming at optimal performance within the whole range of SNRs, we adopt a Maximum Likelihood framework based on the Expectation-Maximization (EM) algorithm. The statistical model and the iterative nature of the EM method allow for a diffusion-based distributed implementation, whereby the information propagation is embedded in the iterative update of the parameters. Numerical examples show that the proposed algorithm practically attains the Cramer{\textendash}Rao Lower Bound at all SNR values and compares favorably with other approaches.
}, keywords = {dynacs, wsn}, doi = {10.1109/LSP.2013.2260329}, author = {Silvana Silva Pereira and R. L{\'o}pez-Valcarce and Alba Pag{\`e}s-Zamora} } @conference {719, title = {The flow fingerprinting game}, booktitle = {IEEE International Workshop on Information Forensics and Security (WIFS)}, year = {2013}, month = {11/2013}, pages = {97{\textendash}102}, address = {Guangzhou, China}, author = {Juan A. Elices and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {702, title = {Forensic analysis of full-frame linearly filtered JPEG images}, booktitle = {IEEE International Conference on Image Processing}, year = {2013}, month = {JPEG compression}, pages = {4517-4521}, address = {Melbourne, Australia}, keywords = {JPEG compression, linear filtering}, author = {Valentina Conotter and Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {683, title = {Fully Private Noninteractive Face Verification}, journal = {IEEE Transactions on Information Forensics and Security}, volume = {8}, year = {2013}, month = {07/2013}, pages = {1101-1114}, keywords = {SPED}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Daniel Gonz{\'a}lez-Jim{\'e}nez and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {710, title = {Joint detection of full-frame linear filtering and JPEG compression in digital images}, booktitle = {IEEE International Workshop on Information Forensics and Security}, year = {2013}, month = {11/2013}, publisher = {IEEE}, organization = {IEEE}, address = {Guangzhou, China}, author = {Valentina Conotter and Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {712, title = {Lattice implementation of adaptive channel shortening in multicarrier transmission over IIR channels}, journal = {EURASIP Journal on Advances in Signal Processing}, volume = {2013:174}, year = {2013}, month = {11/2013}, doi = {10.1186/1687-6180-2013-174}, url = {http://asp.eurasipjournals.com/content/2013/1/174}, author = {E. Ben Salem and S. Cherif and H. Besbes and R. L{\'o}pez-Valcarce} } @conference {699, title = {Learning Based Link Adaptation in Multiuser MIMO-OFDM}, booktitle = {21st European Signal Processing Conference 2013 (EUSIPCO 2013)}, year = {2013}, address = {Marrakech, Morocco}, abstract = {Link adaptation in multiple user multiple-input multiple-output orthogonal frequency division multiplexing communication systems is challenging because of the coupling between user selection, mode selection, precoding, and equalization. In this paper, we present a methodology to perform link adaptation under this multiuser setting, focusing on the capabilities of IEEE 802.11ac. We propose to use a machine learning classifier to solve the problem of selecting a proper modulation and coding scheme, combined with a greedy algorithm that performs user and spatial mode selection. We observe that our solution offers good performance in the case of perfect channel state information or high feedback rate, while those scenarios with less feedback suffer some degradation due to inter-user interference.
}, keywords = {dynacs, link adaptation, Machine Learning, Multiuser MIMO-OFDM}, author = {Alberto Rico-Alvari{\~n}o and Robert W. Heath Jr.} } @article {675, title = {Least Squares Disclosure Attacks: User Profiling for Mix-based Anonymous Communication Systems}, year = {2013}, month = {01/2013}, institution = {University of Vigo}, address = {Vigo}, issn = {UV/TSC/FPG/30052012}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and Carmela Troncoso} } @conference {709, title = {Link Adaptation in MIMO-OFDM with Practical Impairments}, booktitle = {Asilomar Conference on Signals Systems and Computers}, year = {2013}, keywords = {dynacs, link adaptation, MIMO-OFDM}, doi = {10.1109/ACSSC.2013.6810579}, author = {Alberto Rico-Alvari{\~n}o and Robert W. Heath Jr.} } @conference {688, title = {Localization of Forgeries in MPEG-2 Video through GOP Size and DQ analysis}, booktitle = {IEEE International Workshop on Multimedia Signal Processing (MMSP)}, year = {2013}, pages = {494-499}, address = {Pula (Sardinia), Italy}, abstract = {This work addresses forgery localization in MPEG-2 compressed videos. The proposed method is based on the analysis of Double Quantization (DQ) traces in frames that were encoded twice as intra (i.e., I-frames). \ Employing a state-of-the-art method, such frames are located in the video under analysis by estimating the size of the Group Of Pictures (GOP) that was used in the first compression; then, the DQ analysis is devised for the MPEG-2 encoding scheme and applied to frames that were intra-coded in both the first and second compression. In such a way, regions that were manipulated between the two encodings are detected. Compared to existing methods based on double quantization analysis, the proposed scheme makes forgery localization possible on a wider range of settings.
The problem of resampling factor estimation as a means for tampering detection has been largely investigated. Most of the existing techniques rely on the analysis of cyclic correlations induced in the resampled signal. However, in this paper, a new direction is explored by addressing the same problem in terms of the set-membership estimation theory. The proposed technique constructs a model of the problem using available a priori knowledge and in consonance with a finite number of observations that comes from the resampled signal under study. With this information, the proposed technique is able to provide an estimate of the resampling factor applied to the original signal and, if required, an estimate of such signal and an estimate of the interpolation filter. The performance in terms of accuracy and MSE of the proposed approach is evaluated and comparative results with state-of-the-art methods are reported.
This paper addresses the modeling of specific Smart Grid (SG) communication requirements from a data networking research perspective, as a general approach to the study of different access technologies suitable for the last mile (LM). SGLM networks serve customers{\textquoteright} Energy Services Interfaces. From functional descriptions of SG, a traffic model is developed. It is then applied to the study of an access architecture based on leased lines from local broadband access providers. This permits consideration of the potential starvation of domestic traffic, which is avoided by applying well-known traffic management techniques. From previous results obtained for a purpose-built WiMAX SGLM network, the intuition that a leased broadband access yields lower latencies is verified. In general, the proposed traffic model simplifies the design of benchmarks for the comparison of candidate access technologies.
}, author = {Gomez-Cuba, Felipe and Asorey-Cacheda, Rafael and Gonz{\'a}lez-Casta{\~n}o, Francisco Javier} } @conference {694, title = {Spectrum Sensing in Time-Varying Channels Using Multiple Antennas}, booktitle = {IEEE 14th Int. Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Darmstadt (Germany)}, year = {2013}, month = {06/2013}, keywords = {cognitive radio, dynacs, spectrum sensing}, doi = {10.1109/SPAWC.2013.6612027}, author = {Daniel Romero and R. L{\'o}pez-Valcarce} } @conference {698, title = {Statistical Cross Layer Adaptation in Fast Fading Mobile Satellite Channels}, booktitle = {Globecom 2013 - Symposium on Selected Areas in Communications (GC13 SAC)}, year = {2013}, address = {Atlanta, USA}, abstract = {Link adaptation in mobile satellite channels is difficult because of the large propagation delays, the frequent signal blockage and the variation of the channel statistics. In this paper, we propose a cross-layer link adaptation strategy that exploits statistical, long-term CSI to increase the throughput when some retransmissions are available; this increase is obtained while meeting a target outage probability constraint. Our strategy takes as inputs the estimated packet error rates of the available modulation and coding schemes (MCS) and their rates; as an output, it returns the optimum sequence of MCS to be used. Results will also show that simple information acquisition strategies can still provide very good results.
}, keywords = {dynacs, fast fading channels, link adaptation, mobile satellite, satcom}, doi = {10.1109/GLOCOM.2013.6831502}, author = {Alberto Rico-Alvari{\~n}o and J. Arnau and C. Mosquera} } @conference {704, title = {Taking advantage of source correlation in forensic analysis}, booktitle = {IEEE International Workshop on Multimedia Signal Processing}, year = {2013}, pages = {159-164}, address = {Pula (Sardinia), Italy}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {724, title = {Wideband Spectrum Sensing From Compressed Measurements Using Spectral Prior Information}, journal = {IEEE Trans. Signal Process.}, volume = {61}, year = {2013}, pages = {6232-6246}, keywords = {cognitive radio, compressed sensing, dynacs, spectrum sensing}, issn = {1053-587X}, doi = {10.1109/TSP.2013.2283473}, author = {Daniel Romero and Geert Leus} } @article {651, title = {An Adaptive Feedback Canceller for Full-Duplex Relays Based on Spectrum Shaping}, journal = {IEEE J. Selected Areas in Communications}, volume = {30}, year = {2012}, month = {08/2012}, pages = {1566 - 1577}, abstract = {\
Many problems in digital communications involve wideband radio signals. As the most recent example, the impressive advances in Cognitive Radio systems make even more necessary the development of sampling schemes for wideband radio signals with spectral holes. This is equivalent to considering a sparse multiband signal in the framework of Compressive Sampling theory. Starting from previous results on multicoset sampling and recent advances in compressive sampling, we analyze the matrix involved in the corresponding reconstruction equation and define a new method for the design of universal multicoset codes, that is, codes guaranteeing perfect reconstruction of the sparse multiband signal.
}, isbn = {978-1-4673-0044-5}, doi = {10.1109/ICASSP.2012.6288630}, author = {M. Elena Dom{\'\i}nguez-Jim{\'e}nez and Nuria Gonz{\'a}lez-Prelcic and Gonzalo V{\'a}zquez-Vilar and R. L{\'o}pez-Valcarce} } @conference {660, title = {Detection and information theoretic measures for quantifying the distinguishability between multimedia operator chains}, booktitle = {IEEE Workshop on Information Forensics and Security}, year = {2012}, publisher = {IEEE}, organization = {IEEE}, address = {Tenerife, Spain}, author = {Pedro Comesa{\~n}a} } @conference {654, title = {Detection of Gaussian signals in unknown time-varying channels}, booktitle = {IEEE Statistical Signal Processing Workshop (SSP 2012)}, year = {2012}, month = {08/2012}, publisher = {IEEE}, organization = {IEEE}, address = {Ann Arbor, MI}, abstract = {Spectrum sensing constitutes a key ingredient in many cognitive radio paradigms in order to detect and protect primary transmissions. Most sensing schemes in the literature assume a time-invariant channel. However, when operating in low Signal-to-Noise Ratio (SNR) conditions, observation times are necessarily long and may become larger than the coherence time of the channel. In this paper the problem of detecting an unknown constant-magnitude waveform in frequency-flat time-varying channels with noise background of unknown variance is considered. The channel is modeled using a basis expansion model (BEM) with random coefficients. Adopting a generalized likelihood ratio (GLR) approach in order to deal with nuisance parameters, a non-convex optimization problem results. We discuss different possibilities to circumvent this problem, including several low complexity approximations to the GLR test as well as an efficient fixed-point iterative method to obtain the true GLR statistic. The approximations exhibit a performance ceiling in terms of probability of detection as the SNR increases, whereas the true GLR test does not. Thus, the proposed fixed-point iteration constitutes the preferred choice in applications requiring a high probability of detection.
}, keywords = {cognitive radio, dynacs, spectrum sensing}, doi = {10.1109/CIP.2012.6232933}, author = {Daniel Romero and R. L{\'o}pez-Valcarce} } @conference {662, title = {Detection of video double encoding with GOP size estimation}, booktitle = {IEEE International Workshop on Information Forensics and Security (WIFS)}, year = {2012}, month = {12/2012}, pages = {151-156}, publisher = {IEEE}, organization = {IEEE}, address = {Tenerife, Spain}, abstract = {Video forensics is an emerging discipline, that aims at inferring information about the processing history undergone by a digital video in a blind fashion. In this work we introduce a new forensic footprint and, based on it, propose a method for detecting whether a video has been encoded twice; if this is the case, we also estimate the size of the Group Of Pictures (GOP) employed during the first encoding. As shown in the experiments, the footprint proves to be very robust even in realistic settings (i.e., when encoding is carried out using typical compression rates), that are rarely addressed by existing techniques.
}, author = {David V{\'a}zquez-Pad{\'\i}n and Marco Fontani and Tiziano Bianchi and Pedro Comesa{\~n}a and Alessandro Piva and Mauro Barni} } @conference {638, title = {On the Effect of Echoes in Hybrid Terrestrial-Satellite Single Frequency Networks: Analysis and Countermeasures}, booktitle = {2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC) (ASMS/SPSC 2012)}, year = {2012}, address = {Baiona, Spain}, abstract = {Hybrid Terrestrial Satellite Single Frequency Networks achieve large spectral efficiencies due to a higher frequency reuse, which is attained by transmitting the same waveform in the same frequency band from satellite and terrestrial transmitters. However, the presence of multiple transmitters propitiates the existence of the so-called SFN echoes, which can degrade the system performance even if they arrive within the OFDM guard interval. In this paper we characterize this effect by resorting to PER prediction metrics (or effective SNR metrics), and analyze two simple preprocessing schemes that mitigate this degradation: the use of Alamouti space-time codes, and a convenient prefiltering at the terrestrial transmitter.
}, keywords = {dynacs, Effective SNR, Hybrid Terrestrial- Satellite, satcom, Satellite OFDM, Single Frequency Network, Space-Time Coding}, doi = {10.1109/ASMS-SPSC.2012.6333071}, author = {Alberto Rico-Alvari{\~n}o and C. Mosquera} } @mastersthesis {674, title = {Encrypted Domain Processing for Signal Processing Applications}, year = {2012}, month = {04/2012}, school = {University of Vigo}, address = {Vigo}, author = {Juan Ram{\'o}n Troncoso-Pastoriza} } @conference {721, title = {Fingerprinting a flow of messages to an anonymous server.}, booktitle = {IEEE International Workshop on Information Forensics and Security (WIFS)}, year = {2012}, month = {12/2012}, pages = {97{\textendash}102}, address = {Tenerife, Spain}, author = {Juan A. Elices and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {655, title = {Fully Homomorphic Faces}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2012}, month = {10/2012}, publisher = {IEEE}, organization = {IEEE}, address = {Lake Buena Vista, Florida, USA}, keywords = {face verification, homomorphic processing, lattice cryptography, privacy, watermarking}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {653, title = {Generalized matched filter detector for fast fading channels}, booktitle = {IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP 2012) }, year = {2012}, month = {07/2012}, publisher = {IEEE}, organization = {IEEE}, address = {Kyoto, Japan}, abstract = {In this work, the problem of resampling factor estimation for tampering detection is addressed following the maximum likelihood criterion. By relying on the rounding operation applied after resampling, an approximation of the likelihood function of the quantized resampled signal is obtained. From the underlying statistical model, the maximum likelihood estimate is derived for one-dimensional signals and a piecewise linear interpolation. The performance of the obtained estimator is evaluated, showing that it outperforms state-of-the-art methods.
}, author = {David V{\'a}zquez-Pad{\'\i}n and Pedro Comesa{\~n}a} } @article {648, title = {Multiantenna GLR detection of rank-one signals with known power spectrum in white noise with unknown spatial correlation}, journal = {IEEE Trans. on Signal Processing}, volume = {60}, year = {2012}, month = {06/2012}, pages = {3065 - 3078}, abstract = {A secondary user that tries to reuse the spectrum allocated to a primary user can exploit the knowledge of the primary message to perform this task. In particular, the overlay\ cognitive radio paradigm postulates the use of a fraction of the available power at the secondary transmitter to convey the primary message, so the spectral efficiency of the primary\ system is increased, and, therefore, some transmission resources (time slots or frequency bands) can be released to the secondary transmission while the primary user rate is kept constant. The fraction of released resources can be incremented if some channel state information is available at the secondary transmitter. In this paper, we present a scenario where the secondary transmitter maximizes the primary link quality (measured in terms of Effective SNR), and obtains its channel state information by exploiting the primary user SNR-based feedback.
}, keywords = {cognitive radio, dynacs}, doi = {10.1109/CIP.2012.6232932}, author = {Alberto Rico-Alvari{\~n}o and C. Mosquera} } @proceedings {644, title = {Overlay Spectrum Reuse in a Broadcast Network: Covering the Whole Grayscale of Spaces}, journal = {IEEE Symposium on New Frontiers in Dynamic Spectrum Access Networks (DySPAN 2012)}, year = {2012}, address = {Bellevue, WA}, keywords = {cognitive radio, dynacs}, doi = {10.1109/DYSPAN.2012.6478172}, author = {Alberto Rico-Alvari{\~n}o and C. Mosquera} } @conference {634, title = {Overlay Spectrum Reuse in a Multicarrier Broadcast Network: Coverage Analysis}, booktitle = {The 13th IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC 2012)}, year = {2012}, address = {Cesme, Turkey}, abstract = {A secondary cognitive user overlaying its message in a broadcast multicarrier network is studied. The secondary user exploits the primary message knowledge to convey its own information while preserving the primary user coverage area, determined by a bound on the BER, and taking into account the degradation due to the insertion of an echo in a dominant line of sight environment. The results are compared with those obtained when the coverage area is defined in capacity terms, and regardless of the degradation caused by the secondary replica of the primary message.
}, keywords = {cognitive radio, dynacs}, doi = {10.1109/SPAWC.2012.6292889}, author = {Alberto Rico-Alvari{\~n}o and C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {635, title = {Overlay Spectrum Reuse in a Multicarrier Broadcast Network: Single Receiver Analysis}, booktitle = {The 13th IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC 2012)}, year = {2012}, address = {Cesme, Turkey}, abstract = {The overlay cognitive radio paradigm presents a framework where a secondary user exploits the knowledge of the primary user{\textquoteright}s message to improve spectrum utilization. A multicarrier broadcast network is one of the scenarios where this knowledge is possible: the secondary user could join a single frequency network and, therefore, gain access to the primary message. However, if the primary signal is received with a strong line of sight component, its relaying from the secondary transmitter does not suffice to ensure the primary user quality of service. In this paper we study the scenario where a secondary transmitter maximizes its own transmission rate, keeping the quality of a primary receiver over a given threshold. The analytical results, based on bit error rate bounds, are verified by means of software simulations and hardware tests.
}, keywords = {cognitive radio, dynacs}, doi = {10.1109/SPAWC.2012.6292890}, author = {Alberto Rico-Alvari{\~n}o and C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {640, title = {Performance Analysis of Multiuser Detection for Multibeam Satellites Under Rain Fading}, booktitle = {2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC) (ASMS/SPSC 2012)}, year = {2012}, address = {Baiona, Spain}, abstract = {Multibeam satellite systems are nowadays widely employed, and their use is expected to grow in the next decades. This has raised the interest for signal processing techniques able to mitigate the interference among beams, since they could enable a much more aggressive spectrum reuse. From an engineering point of view, the design of the system must be no longer based on the capabilities provided by the usual physical layer; it should take into account the presence of these interference canceling techniques, predict their performance as accurately as possible -even under a number of impairments and non-idealities- and design accordingly in order to fully exploit them. In this paper, we investigate the effect of a practical impairment of great importance, namely, the attenuation due to the rain, on the performance of a return link which performs MMSE interference canceling. Analytical expressions are derived for a number of performance measures based on the statistical characterization of the rain attenuation.
}, keywords = {dynacs, hybrid beamforming, multibeam satellites., Multiuser detection, rain fading, satcom}, doi = {10.1109/ASMS-SPSC.2012.6333078}, author = {Arnau, Jesus and C. Mosquera} } @article {636, title = {Performance study of multiuser interference mitigation schemes for hybrid broadband multibeam satellite architectures}, journal = {EURASIP Journal on Wireless Communications and Networking}, volume = {2012}, year = {2012}, pages = {132}, issn = {1687-1499}, doi = {10.1186/1687-1499-2012-132}, url = {http://jwcn.eurasipjournals.com/content/2012/1/132}, author = {Arnau, Jesus and Bertrand Devillers and C. Mosquera and Ana P{\'e}rez-Neira} } @conference {722, title = {Understanding statistical disclosure: A least squares approach}, booktitle = {Privacy Enhancing Technologies Symposium (PETS)}, year = {2012}, month = {07/2012}, pages = {38{\textendash}57}, address = {Vigo, Spain}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and Carmela Troncoso} } @conference {656, title = {On the Application of a Hybrid Harmony Search Algorithm to Node Localization in Anchor-based Wireless Sensor Networks}, booktitle = {IEEE International Conference on Intelligent Systems Design and Applications (ISDA)}, year = {2011}, author = {Diana Manjarres and Javier Del Ser and Sergio Gil-Lopez and Massimo Vecchio and Itziar Landa-Torres and R. L{\'o}pez-Valcarce} } @conference {romero2011bandlimited, title = {Bandlimited or Constant Envelope? Exploiting Waveform Properties in Wireless Microphone Detection}, booktitle = {International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP)}, year = {2011}, month = {December}, pages = {17-20}, address = {San Juan, Puerto Rico}, keywords = {Bandlimited signals., Constant Magnitude, dynamic spectrum access, Wireless Microphones}, author = {Daniel Romero and R. L{\'o}pez-Valcarce} } @article {669, title = {Bit Loading Using Imperfect CSIT for Prediction-Based Resource Allocation in Mobile OFDMA}, journal = {Vehicular Technology, IEEE Transactions on}, volume = {60}, year = {2011}, month = {oct.}, pages = {4082 -4088}, keywords = {bit loading, channel state information in the transmitter, CSIT, frequency division multiple access, imperfect channel prediction information, mobile OFDMA, mobile radio, mobile stations, OFDM modulation, orthogonal frequency division multiple access, prediction error, prediction-based resource allocation, radio transmitters, time-varying channels, wireless channel}, issn = {0018-9545}, doi = {10.1109/TVT.2011.2165305}, author = {Schmidt, J.F. and Cousseau, J.E. and Wichman, R. and Werner, S.} } @conference {Rico2011, title = {On the Co-existence of Primary and Secondary Transmitters in a Broadcast Network}, booktitle = {International Conference on Cognitive Radio and Advanced Spectrum Management}, year = {2011}, address = {Barcelona, Catalonia, Spain}, keywords = {Broadcast, cognitive radio, Overlay, Single Frequency Network}, author = {Alberto Rico-Alvari{\~n}o and C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {VazquezValcarceICASSP11, title = {Detection diversity of multiantenna spectrum sensors}, booktitle = {IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP 2011)}, year = {2011}, month = {05/2011}, pages = {2936-2939}, publisher = {IEEE}, organization = {IEEE}, address = {Prague, Czech Republic}, abstract = {Spectrum sensing design for Cognitive Radio systems is challenged by the nature of the wireless medium, which makes the detection requirements difficult to achieve by standalone sensors. To combat shadowing and fading, distributed strategies are usually proposed. However, most distributed approaches are based on the energy detector, which is not robust to noise uncertainty. This phenomenon can be overcome by multi-antenna sensors exploiting spatial independence of the noise process. We combine both ideas to develop distributed detectors for multiantenna sensors. Fusion rules are provided for sensors based on the Generalized Likelihood Ratio as well as for ad hoc detectors derived from geometric considerations. Simulation results are provided comparing the performance of the different strategies under lognormal shadowing and Ricean fading.
}, keywords = {ad hoc detectors, antenna arrays, calibration, calibration errors, cognitive radio, energy detector, generalized likelihood ratio, log normal distribution, lognormal shadowing, multiantenna sensors, Ricean fading, spectrum sensing, wireless medium}, issn = {1948-3244}, doi = {10.1109/SPAWC.2011.5990448}, author = {Daniel Romero and R. L{\'o}pez-Valcarce} } @conference {MASS2011, title = {An Effective Metaheuristic Approach to Node Localization in Wireless Sensor Networks}, booktitle = {IEEE International Conference on Mobile Ad-hoc and Sensor Systems (MASS)}, year = {2011}, author = {Massimo Vecchio and R. L{\'o}pez-Valcarce and Francesco Marcelloni} } @conference {troncosoICASSP11, title = {Efficient Protocols for Secure Adaptive Filtering}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2011}, month = {May}, pages = {5860-5863}, publisher = {IEEE}, organization = {IEEE}, address = {Prage, Czech Republic}, keywords = {adaptive filtering, privacy, security, watermarking}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {troncosoCLOSER11, title = {Encrypted Domain Processing for Cloud Privacy: Concept and Practical Experience}, booktitle = {International Conference on Cloud Computing and Services Science (CLOSER)}, year = {2011}, month = {May}, address = {Noordwijkerhout, The Netherlands}, keywords = {cloud, privacy, security, watermarking}, author = {Daniel A. Rodr{\'\i}guez-Silva and F. Javier Gonz{\'a}lez-Casta{\~n}o and Lilian Adkinson-Orellana and Alexandre Fern{\'a}ndez-Cordeiro and Juan Ram{\'o}n Troncoso-Pastoriza and Daniel Gonz{\'a}lez-Mart{\'\i}nez} } @conference {dvazquez-iwdw11, title = {Exposing original and duplicated regions using SIFT features and resampling traces}, booktitle = {International Workshop on Digital Watermarking (IWDW)}, year = {2011}, month = {10/2011}, pages = {306-320}, publisher = {Springer Berlin Heidelberg}, organization = {Springer Berlin Heidelberg}, address = {Atlantic City, USA}, abstract = {A common type of digital image forgery is the duplication of a region in the same image to conceal something in a captured scene. The detection of region duplication forgeries has been recently addressed using methods based on SIFT features that provide points of the regions involved in the tampering and also the parameters of the geometric transformation between both regions. However, considering this output, there is not yet any information about which of the regions are originals and which are the duplicated ones. A reliable image forensic analysis must provide this information. In this paper, we propose to use a resampling-based method to provide an accurate way to distinguish the original and the tampered regions by analizing the resampling factor of each area. Comparative results are presented to evaluate the performance of the combination of both methods.
\
}, keywords = {Image forensics, region duplication, resampling estimation, SIFT}, doi = {10.1007/978-3-642-32205-1_25}, author = {David V{\'a}zquez-Pad{\'\i}n and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {ScagliolaTCOM11, title = {Gain-Invariant Dirty Paper Coding for Hierarchical OFDM}, journal = {IEEE Transactions on Communications}, volume = {59}, number = {12}, year = {2011}, month = {December}, pages = {3323-3334}, abstract = {A novel approach is here presented to superimpose a low-priority data stream on a high-priority data stream for OFDM systems. The main improvement with respect to conventional hierarchical modulation, which is included with the same purpose in various wireless technologies, is that the low-priority data stream can be decoded from the received subcarrier symbols without any previous equalization for multipath fading channels. As a consequence, the expected performance is nearly invariant of the channel estimation method used to equalize the channel. The low-priority stream is inserted adopting a gain-invariant dirty paper coding based on Rational Dither Modulation, which was proposed for data hiding applications. In this paper an analysis of the developed system is presented and several simulations have been carried out using DVB-T system parameters to verify the validity of the proposed approach. The experimental results show the better performance of the proposed method with respect to that of a conventional hierarchical modulation, particularly when the accuracy of the estimated channel response decreases.
}, keywords = {dirty paper, dynacs, Hierarchical OFDM, watermarking}, issn = {0090-6778}, doi = {10.1109/TCOMM.2011.101011.100544}, author = {Scagliola, Michele and Fernando P{\'e}rez-Gonz{\'a}lez and Guccione, Pietro} } @conference {Arna1112:Hybrid, title = {Hybrid Space-Ground Processing for High-Capacity Multi-beam Satellite Systems}, booktitle = {IEEE GLOBECOM}, year = {2011}, note = {Selected Areas in Communications Symposium - Satellite \& Space Communications Track (GC{\textquoteright}11 - SAC - SSC)}, month = {dec}, address = {Houston, Texas, USA}, author = {Arnau, Jesus and Michael Bergmann and Enzo Alberto Candreva and Giovanni Emanuele Corazza and Riccardo {De Gaudenzi} and Bertrand Devillers and Wilfried Gappmair and Francesco Lombardo and C. Mosquera and Ana P{\'e}rez-Neira and Ilaria Thibault and Alessandro Vanelli-Coralli} } @conference {GDCDK2011, title = {Improving the Visual Performance of S/DISCUS}, booktitle = {IEEE International Conference on Multimedia and Expo (ICME)}, year = {2011}, month = {July}, address = {Barcelona, Catalonia}, keywords = {distributed source coding, keyless security, low-complexity video coding, Slepian-Wolf coding, watermarking, wireless multimedia sensor networks}, author = {Gabriel Dom{\'\i}nguez-Conde and Deepa Kundur} } @mastersthesis {800, title = {Interference and Network Management in Cognitive Communication Systems}, volume = {Ph.D.}, year = {2011}, month = {06/2011}, school = {University of Vigo}, type = {Ph.D. thesis}, address = {Vigo, Spain}, keywords = {cognitive radio, spectrum sensing}, author = {Gonzalo V{\'a}zquez-Vilar} } @conference {Devi1112:Joint, title = {Joint Linear Precoding and Beamforming for the Forward Link of Multi-Beam Broadband Satellite Systems}, booktitle = {IEEE GLOBECOM}, year = {2011}, note = {Selected Areas in Communications Symposium - Satellite \& Space Communications Track (GC{\textquoteright}11 - SAC - SSC)}, address = {Houston, Texas, USA}, author = {Bertrand Devillers and Ana Isabel Perez and C. Mosquera} } @article {670, title = {Low-Complexity Channel Prediction Using Approximated Recursive DCT}, journal = {Circuits and Systems I: Regular Papers, IEEE Transactions on}, volume = {58}, year = {2011}, month = {oct.}, pages = {2520 -2530}, keywords = {autoregressive modeling, autoregressive processes, basis expansion model, channel estimator, computational complexity, DCT, discrete cosine transform, discrete cosine transforms, Doppler frequencies, filter bank, Kalman filters, low-complexity channel prediction, OFDM modulation, OFDM systems, recursive formulation, steady-state Kalman filter, sum-of-sinusoids channel predictors, time-varying channels}, issn = {1549-8328}, doi = {10.1109/TCSI.2011.2158139}, author = {Schmidt, J.F. and Cousseau, J.E. and Wichman, R. and Werner, S.} } @conference {5990449, title = {Multiantenna detection of constant-envelope signals in noise of unknown variance}, booktitle = {IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC)}, year = {2011}, month = {june}, pages = {446 -450}, abstract = {Detection of unknown signals with constant modulus (CM) using multiple antennas in additive white Gaussian noise of unknown variance is considered. The channels from the source to each antenna are assumed frequency-flat and unknown. This problem is of interest for spectrum sensing in cognitive radio systems in which primary signals are known to have the CM property. Examples include analog frequency modulated signals such as those transmitted by wireless microphones in the TV bands and Gaussian Minimum Shift Keying modulated signals as in the GSM cellular standard. The proposed detector, derived from a Generalized Likelihood Ratio (GLR) approach, exploits both the CM property and the spatial independence of noise, outperforming the GLR test for Gaussian signals as shown by simulation.
}, keywords = {cognitive radio, multiantenna detection, spectrum sensing}, issn = {1948-3244}, doi = {10.1109/SPAWC.2011.5990449}, author = {Daniel Romero and R. L{\'o}pez-Valcarce} } @conference {RamirezVazquezICASSP11, title = {Multiantenna detection under noise uncertainty and primary user{\textquoteright}s spatial structure}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2011}, month = {May}, pages = {2948-2951}, publisher = {IEEE}, organization = {IEEE}, address = {Prage, Czech Republic}, keywords = {cognitive radio, generalized likelihood ratio test (GLRT), spectrum sensing}, author = {David Ram{\'\i}rez and Gonzalo V{\'a}zquez-Vilar and R. L{\'o}pez-Valcarce and Javier V{\'\i}a and Ignacio Santamar{\'\i}a} } @article {649, title = {Multiantenna Spectrum Sensing Exploiting Spectral a priori Information}, journal = {IEEE Trans. on Wireless Communications}, volume = {10}, year = {2011}, month = {12/2011}, pages = {4345 - 4355}, keywords = {cognitive radio, dynacs, spectrum sensing}, doi = {10.1109/TWC.2011.101211.110665}, author = {Gonzalo V{\'a}zquez-Vilar and R. L{\'o}pez-Valcarce and Josep Sala} } @conference {Pineiro-SPIE2011, title = {A new method for perspective correction of document images}, booktitle = {Document Recognition and Retrieval}, series = {Proc. of SPIE}, volume = {7874}, year = {2011}, month = {January}, pages = {787410}, publisher = {SPIE}, organization = {SPIE}, address = {San Francisco, CA}, keywords = {Document image, perspective distortion correction, watermarking}, author = {Jos{\'e} Rodr{\'\i}guez-Pi{\~n}eiro and Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez and Alberto Malvido} } @conference {671, title = {Prediction based resource allocation in OFDMA}, booktitle = {Information Sciences and Systems (CISS), 2011 45th Annual Conference on}, year = {2011}, month = {march}, pages = {1 -4}, keywords = {empirical characterization, frequency division multiple access, low-complexity channel predictor, mobile radio, mobile stations, mobile wireless channels, OFDM modulation, OFDMA downlink, orthogonal frequency division multiple access downlink, perfect channel state information, prediction error characterization, prediction-based RA strategies, prediction-based resource allocation algorithm, wireless channels}, doi = {10.1109/CISS.2011.5766224}, author = {Schmidt, J.F. and Cousseau, J.E. and Wichman, R. and Werner, S.} } @conference {658, title = {Prefilter Design for Forensic Resampling Estimation}, booktitle = {IEEE International Workshop on Information Forensics and Security (WIFS)}, year = {2011}, month = {12/2011}, pages = {1-6}, publisher = {IEEE}, organization = {IEEE}, address = {Foz do Igua{\c c}u, Brazil}, abstract = {Starting from a theoretical analysis of the resampling estimation problem for image tampering detection, this work presents a study, based on cyclostationarity theory, about the use of prefilters to improve the estimation accuracy of the resampling factor. Considering the methods that perform the estimation by analyzing the spectrum of the covariance of a resampled region, we propose an analytical framework that allows the definition of a cost function that measures the degree of detectability of the spectral peaks. Based on this measure, the design of the optimum prefilters for a particular resampling factor can be solved numerically. Experimental results validate the developed analysis and illustrate the enhancement of the performance in a real scenario.
}, doi = {10.1109/WIFS.2011.6123133}, author = {David V{\'a}zquez-Pad{\'\i}n and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {troncosoTIFS2011, title = {Secure Adaptive Filtering}, journal = {IEEE Transactions on Information Forensics and Security}, volume = {6}, number = {2}, year = {2011}, month = {June}, pages = {469 -485}, keywords = {adaptive signal processing, computational complexity, cryptography, digital data protection, encrypted domain, homomorphic encryption systems, least mean squares algorithm, least mean squares methods, privacy, secure adaptive filtering, security, signal privacy preservation, SPED techniques, watermarking}, doi = {10.1109/TIFS.2011.2109385}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {NaBIC2011, title = {Solving the Node Localization Problem in WSNs by a Two-objective Evolutionary Algorithm and Gradient Descent}, booktitle = {the 3-th IEEE World Congress on Nature and Biologically Inspired Computing (NaBIC 2011)}, year = {2011}, author = {Massimo Vecchio and R. L{\'o}pez-Valcarce and Francesco Marcelloni} } @article {VazquezValcarceTSP11, title = {Spectrum Sensing Exploiting Guard Bands and Weak Channels}, journal = {IEEE Trans. on Signal Processing}, volume = {59}, number = {12}, year = {2011}, month = {12/2011}, pages = {6045-6057}, abstract = {To know the location of nodes plays an important role in many current and envisioned wireless sensor network applications. In this framework, we consider the problem of estimating the locations of all the nodes of a network, based on noisy distance measurements for those pairs of nodes in range of each other, and on a small fraction of anchor nodes whose actual positions are known a priori. The methods proposed so far in the literature for tackling this non-convex problem do not generally provide accurate estimates. The difficulty of the localization task is exacerbated by the fact that the network is not generally uniquely localizable when its connectivity is not sufficiently high. In order to alleviate this drawback, we propose a two-objective evolutionary algorithm which takes concurrently into account during the evolutionary process both the localization accuracy and certain topological constraints induced by connectivity considerations. The proposed method is tested with different network configurations and sensor setups, and compared in terms of normalized localization error with another metaheuristic approach, namely SAL, based on simulated annealing. The results show that, in all the experiments, our approach achieves considerable accuracies and significantly outperforms SAL, thus manifesting its effectiveness and stability.
}, keywords = {dynacs, Multiobjective evolutionary algorithms, Node localization, Range measurements, Stochastic optimization, wsn}, issn = {1568-4946}, doi = {10.1016/j.asoc.2011.03.012}, author = {Massimo Vecchio and R. L{\'o}pez-Valcarce and Francesco Marcelloni} } @conference {Comesana-ICASSP2011, title = {Weber{\textquoteright}s law-based side-informed data hiding}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2011}, month = {May}, pages = {1840-1843}, address = {Prague, Czech Republic}, keywords = {data hiding, Logarithmic watermarking, Perceptually shaped watermarks, watermarking, Weber{\textquoteright}s law}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {pcomesan-iwdw11, title = {Witsenhausen{\textquoteright}s counterexample and its links with multimedia security problems}, booktitle = {International Workshop on Digital Watermarking (IWDW)}, year = {2011}, month = {October}, address = {Atlantic City, USA}, keywords = {control, Multimedia security, Witsenhausen{\textquoteright}s counterexample}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez and Chaouki T. Abdallah} } @article {Comesana-TIT2010, title = {Asymptotically Optimum Universal Watermark Embedding and Detection in the High-SNR Regime}, journal = {IEEE Transactions on Information Theory}, volume = {56}, number = {6}, year = {2010}, month = {June}, pages = {2804-2815}, keywords = {hypothesis testing, Neyman-Pearson, watermark detection, watermark embedding, watermarking}, author = {Pedro Comesa{\~n}a and Neri Merhav and Mauro Barni} } @article {Alvarez-Diaz-SigPro-10, title = {Blind l_1-Norm-Based Phase Estimation for Cross-QAM Robust to Finite Precision Effects}, journal = {Signal Processing}, volume = {90}, year = {2010}, note = {Accepted for publication}, month = {11/2010}, pages = {2934-2948}, keywords = {blind phase estimation, carrier offset, cross-QAM constellations, fixed point implementation}, author = {Marcos {\'A}lvarez-D{\'\i}az and R. L{\'o}pez-Valcarce and Iago G{\'o}mez-Alonso} } @article {KsibiCherif10, title = {Closed-form real single-tone frequency estimator based on a normalized IIR notch filter}, journal = {Signal Processing}, volume = {90}, number = {6}, year = {2010}, month = {June}, pages = {1905-1915}, keywords = {Frequency estimation, IIR notchfilter, Least squares, Real sinusoid, RPHD estimator}, author = {R. Elasmi-Ksibi and S. Cherif and R. L{\'o}pez-Valcarce and H. Besbes} } @conference {troncosoCISE10, title = {CryptoDSPs for Cloud Privacy}, booktitle = {International Workshop on Cloud Information System Engineering (CISE)}, series = {LNCS}, volume = {6724}, year = {2010}, month = {December}, address = {Hong Kong, China}, keywords = {cloud, privacy, security, watermarking}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez} } @mastersthesis {799, title = {Design of Nonlinear Precoding and Estimation Schemes for Advanced Communication Systems}, volume = {Ph.D.}, year = {2010}, month = {04/2010}, type = {Ph.D. thesis}, keywords = {adaptive signal processing, satcom}, author = {Marcos {\'A}lvarez-D{\'\i}az} } @article {JayaweeraVazquezMosquera2010, title = {Dynamic spectrum leasing (DSL): A new paradigm for spectrum sharing in cognitive radio networks}, journal = {IEEE Transactions on Vehicular Technology}, volume = {59}, number = {5}, year = {2010}, pages = {2328-2339}, keywords = {cognitive radio, DSL, dynamic spectrum access, dynamic spectrum leasing, dynamic spectrum sharing, game theory, power control}, author = {Sudhaman K. Jayaweera and Gonzalo V{\'a}zquez-Vilar and C. Mosquera} } @conference {ElHowayekJayaweeraHakimVazquezMosquera2010, title = {Dynamic Spectrum Leasing (DSL) in Dynamic Channels}, booktitle = {ICC Workshop on Cognitive Radio Interfaces and Signal Processing (ICC CRISP)}, year = {2010}, month = {May 23}, address = {Cape Town, South Africa}, keywords = {cognitive radio, DSL, dynamic spectrum leasing, game theory, Rayleigh fading, time-varying channels, time-varying secondary system}, author = {Georges El-Howayek and Sudhaman K. Jayaweera and Kamrul Hakim and Gonzalo V{\'a}zquez-Vilar and C. Mosquera} } @article {HakimJayaweeraHowayekMosqueraTWC2010, title = {Efficient Dynamic Spectrum Sharing in Cognitive Radio Networks: Centralized Dynamic Spectrum Leasing (C-DSL)}, journal = {IEEE Transactions on Wireless Communications}, volume = {9}, number = {9}, year = {2010}, pages = {2956-2967}, author = {Kamrul Hakim and Sudhaman K. Jayaweera and Georges El-Howayek and C. Mosquera} } @conference {SalemValcarce10, title = {A finite interval constant modulus criterion for multicarrier channel shortening}, booktitle = {European Wireless}, year = {2010}, address = {Lucca, Italy}, author = {E. Ben Salem and R. L{\'o}pez-Valcarce and H. Besbes and S. Cherif} } @article {KsibiBesbesSP10, title = {Frequency estimation of real-valued single-tone in colored noise using multiple autocorrelation lags}, journal = {Signal Processing}, volume = {90}, number = {7}, year = {2010}, month = {July}, pages = {2303-2307}, keywords = {Autocorrelation, Frequency estimation, Single sinusoid}, author = {R. Elasmi-Ksibi and H. Besbes and R. L{\'o}pez-Valcarce and S. Cherif} } @article {MosqueraValcarceJayaweera2010, title = {Joint NDA Estimation of Carrier Frequency/Phase and SNR for Linearly Modulated Signals}, journal = {IEEE Signal Processing Letters}, volume = {17}, number = {5}, year = {2010}, month = {05/2010}, pages = {517-520}, keywords = {Carrier offset estimation, Cramer-Rao lower bound, expectation-maximization algorithm, SNR estimation}, author = {Wilfried Gappmair and R. L{\'o}pez-Valcarce and C. Mosquera} } @article {ShebaroDRFWS2010, title = {Leaving Timing Channel Fingerprints in Hidden Service Log Files}, journal = {Digital Investigation}, year = {2010}, note = {doi:10.1016/j.diin.2010.05.013}, keywords = {data-hiding, fingerprints, hidden services, timestamps, timing channel, tor network, watermarking}, author = {Bilal Shebaro and Fernando P{\'e}rez-Gonz{\'a}lez and Jedidiah R. Crandall} } @conference {ShebaroElsevier2010, title = {Leaving Timing Channel Fingerprints in Hidden Service Log Files}, booktitle = {Digital Forensic Research Workshop Annual Conference (DFRWS)}, year = {2010}, month = {August}, address = {Portland, Oregon}, keywords = {data hiding, fingerprints, hidden services, timestamps, timing channel, tor network, watermarking}, author = {Bilal Shebaro and Fernando P{\'e}rez-Gonz{\'a}lez and Jedidiah R. Crandall} } @conference {RamirezValcarceICASSP10, title = {Multiantenna spectrum sensing: detection of spatial correlation among time-series with unknown spectra}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2010}, address = {Dallas, TX}, keywords = {cognitive radio, coherence spectrum, generalized likelihood ratio test, Hadamard ratio, multiple-channel signal detection}, author = {David Ram{\'\i}rez and Javier V{\'\i}a and Ignacio Santamar{\'\i}a and R. L{\'o}pez-Valcarce and L. L. Scharf} } @conference {ValcarceVazquez10, title = {Multiantenna spectrum sensing for Cognitive Radio: overcoming noise uncertainty}, booktitle = {International Workshop on Cognitive Information Processing (CIP)}, year = {2010}, address = {Elba Island, Italy}, author = {R. L{\'o}pez-Valcarce and Gonzalo V{\'a}zquez-Vilar and Josep Sala} } @conference {troncosoicassp09, title = {A new model for Gabor Coefficients{\textquoteright} Magnitude in Face Recognition}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2010}, month = {March}, publisher = {IEEE}, organization = {IEEE}, address = {Dallas, USA}, keywords = {Gabor coefficients, generalized Gaussian, Magnitude, Quantization, Statistical Model, watermarking}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Daniel Gonz{\'a}lez-Jim{\'e}nez and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {PaperASMS2010, title = {Performance Analysis of Distributed Tracking with Consensus on Noisy Time-Varying Graphs}, booktitle = {Advanced Satellite Multimedia Systems Conference (ASMA)}, year = {2010}, pages = {395-400}, address = {Cagliari, Italy}, keywords = {connectivity graph, distributed local Kalman filtering, distributed tracking, distributed tracking with consensus, graph topology, network theory (graphs), noisy communications links, noisy time-varying graphs, performance analysis, telecommunication links, telecommunication network topology, time-varying network topology, time-varying systems}, author = {Yongxiang Ruan and Sudhaman K. Jayaweera and C. Mosquera} } @article {GonzaloCarlosSudharman2010, title = {Primary User Enters the Game: Performance of Dynamic Spectrum Leasing in Cognitive Radio Networks}, journal = {IEEE Transactions on Wireless Communications}, year = {2010}, author = {Gonzalo V{\'a}zquez-Vilar and C. Mosquera and Sudhaman K. Jayaweera} } @conference {dalgaard-icip10, title = {On the Role of Differentiation for Resampling Detection}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2010}, month = {September}, publisher = {IEEE}, organization = {IEEE}, address = {Hong Kong, China}, keywords = {cyclostationarity, Image forensics, interpolation, prefiltering, resampling detection, watermarking}, author = {Nahuel Dalgaard and C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {troncosovph10, title = {Secure and Private Medical Clouds using Encrypted Processing}, booktitle = {Virtual Physiological Human (VPH)}, year = {2010}, month = {October}, address = {Brussels, Belgium}, keywords = {cloud, privacy, security, watermarking}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {Alvarez-Diaz-TSP-10, title = {SNR Estimation for Multilevel Constellations Using Higher-Order Moments}, journal = {IEEE Transactions on Signal Processing}, volume = {58}, number = {3, Part 2}, year = {2010}, month = {March}, pages = {1515{\textendash}1526}, keywords = {Blind estimation, higher-order statistics, Moments-based estimation, SNR estimation}, author = {Marcos {\'A}lvarez-D{\'\i}az and R. L{\'o}pez-Valcarce and C. Mosquera} } @article {MosqueraValcarceJayaweera2009, title = {Stepsize Sequence Design for Distributed Average Consensus}, journal = {IEEE Signal Processing Letters}, volume = {17}, number = {2}, year = {2010}, month = {Feb}, pages = {169-172}, author = {C. Mosquera and R. L{\'o}pez-Valcarce and Sudhaman K. Jayaweera} } @conference {dvazquez-icip10, title = {Two-dimensional Statistical Test for the Presence of Almost Cyclostationarity on Images}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2010}, month = {09/2010}, pages = {1745-1748}, publisher = {IEEE}, organization = {IEEE}, address = {Hong Kong, China}, abstract = {In this work, we study the presence of almost cyclostationary fields in images for the detection and estimation of digital forgeries. The almost periodically correlated fields in the two-dimensional space are introduced by the necessary interpolation operation associated with the applied spatial transformation. In this theoretical context, we extend a statistical time-domain test for presence of cyclostationarity to the two-dimensional space. The proposed method allows us to estimate the scaling factor and the rotation angle of resized and rotated images, respectively. Examples of the output of our method are shown and comparative results are presented to evaluate the performance of the two-dimensional extension.
}, keywords = {cyclostationarity, Image forensics, interpolation, resampling factor estimation, spatial transformation, watermarking}, doi = {10.1109/ICIP.2010.5652513}, author = {David V{\'a}zquez-Pad{\'\i}n and C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {VazquezValcarceMosqueraPrelcic2010, title = {Wideband Spectral Estimation from Compressed Measurements Exploiting Spectral a priori Information in Cognitive Radio Systems}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2010}, month = {March 14-19}, address = {Dallas, U.S.A.}, keywords = {cognitive radio, compressive sampling, Spectral estimation}, author = {Gonzalo V{\'a}zquez-Vilar and R. L{\'o}pez-Valcarce and C. Mosquera and Nuria Gonz{\'a}lez-Prelcic} } @conference {Freire2009:WIFS, title = {Blind decoder for binary probabilistic traitor tracing codes}, booktitle = {IEEE International Workshop on Information Forensics and Security (WIFS)}, year = {2009}, month = {6-9 December}, pages = {56-60}, address = {London, UK}, keywords = {collusion, information theory, Tardos, Traitor tracing, watermarking}, author = {Luis P{\'e}rez-Freire and Teddy Furon} } @article {ValcarceMosqueraTCOM08, title = {Cramer-Rao Lower Bound and EM Algorithm for Envelope-Based SNR Estimation of Nonconstant Modulus Constellations}, journal = {IEEE Transactions on Communications}, volume = {57}, number = {6}, year = {2009}, month = {june}, pages = {1622 - 1627}, author = {Wilfried Gappmair and R. L{\'o}pez-Valcarce and C. Mosquera} } @conference {JayaweeraMosqueraAsilomar2009, title = {A Dynamic Spectrum Leasing (DSL) Framework for Spectrum Sharing in Cognitive Radio Networks}, booktitle = {Asilomar Conference on Signals, Systems and Computers}, year = {2009}, author = {Sudhaman K. Jayaweera and C. Mosquera} } @conference {Furon2009:EM, title = {EM decoding of Tardos traitor tracing codes}, booktitle = {ACM Workshop on Multimedia and Security (MMSEC)}, year = {2009}, month = {7-8 September}, address = {Princeton, NJ, USA}, keywords = {collusion channel, Expectation-Maximization, iterative decoding, Tardos code, Traitor tracing, watermarking}, author = {Teddy Furon and Luis P{\'e}rez-Freire} } @conference {IH09, title = {Estimating the minimal length of Tardos code}, booktitle = {International Workshop on Information Hiding (IH)}, series = {Lecture Notes in Computer Science}, year = {2009}, month = {7-10 June}, address = {Darmstadt, Germany}, keywords = {Fingerprinting, Rare event, Tardos code, Traitor tracing, watermarking}, author = {Teddy Furon and Luis P{\'e}rez-Freire and Arnaud Guyader and Fr{\'e}d{\'e}ric C{\'e}rou} } @conference {wifs09, title = {AN EXTENDED ANALYSIS OF DISCRETE FOURIER TRANFORM - RATIONAL DITHER MODULATION FOR NON-WHITE HOSTS}, booktitle = {IEEE International Workshop on Information Forensics and Security (WIFS)}, year = {2009}, month = {December}, publisher = {IEEE}, organization = {IEEE}, address = {London, U.K.}, keywords = {data hiding, dither modulation, filtering, non-white Gaussian hosts, watermarking}, author = {Scagliola, Michele and Fernando P{\'e}rez-Gonz{\'a}lez and Guccione, Pietro} } @article {scagliojis09, title = {High-rate data-hiding robust to linear filtering for colored hosts}, journal = {EURASIP Journal on Information Security}, year = {2009}, keywords = {data-hiding, rational dither modulation, watermarking}, author = {Scagliola, Michele and Fernando P{\'e}rez-Gonz{\'a}lez and Guccione, Pietro} } @conference {spieei09, title = {Model-based steganalysis using invariant features}, booktitle = {Media Forensics and Security}, year = {2009}, month = {January}, address = {San Jose, CA, U.S.A.}, keywords = {Invariant features, Model-based, Steganalysis}, author = {Tu-Thach Quach and Fernando P{\'e}rez-Gonz{\'a}lez and Gregory L. Heileman} } @conference {dgonzalez-icip09, title = {Modeling Magnitudes of Gabor Coefficients: The \β-Rayleigh Distribution}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2009}, month = {November}, publisher = {IEEE}, organization = {IEEE}, address = {Cairo, Egypt}, keywords = {Gabor, generalized Gaussian, Rayleigh, watermarking}, author = {Daniel Gonz{\'a}lez-Jim{\'e}nez and Enrique Argones-R{\'u}a and Fernando P{\'e}rez-Gonz{\'a}lez and Jos{\'e} Luis Alba-Castro} } @conference {ValcarceVazquezAlvarez2009, title = {Multiantenna detection of multicarrier primary signals exploiting spectral a priori information}, booktitle = {International Conference on Cognitive Radio Oriented Wireless Networks and Communications (Crowncom)}, year = {2009}, month = {June 22-24}, address = {Hannover, Germany}, author = {R. L{\'o}pez-Valcarce and Gonzalo V{\'a}zquez-Vilar and Marcos {\'A}lvarez-D{\'\i}az} } @conference {dominguezicip09, title = {Performance Analysis of Fridrich-Goljan Self-Embedding Authentication Method}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2009}, month = {November}, address = {Cairo, Egypt}, keywords = {cryptography, error statistics, false negative probabilities, false positive probabilities, Fridrich-Goljan self-embedding authentication method, hash bit errors, image authentication method, image coding, message authentication, performance analysis, robust hashing, watermarking}, author = {Gabriel Dom{\'\i}nguez-Conde and Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {domingueztifs09, title = {Performance Analysis of Fridrich-Goljan Self-Embedding Authentication Method}, journal = {IEEE Transactions on Information Forensics and Security}, volume = {4}, number = {3}, year = {2009}, month = {Sept.}, pages = {570-577}, keywords = {cryptography, error statistics, false negative probabilities, false positive probabilities, Fridrich-Goljan self-embedding authentication method, hash bit errors, image authentication method, image coding, message authentication, performance analysis, robust hashing, watermarking}, author = {Gabriel Dom{\'\i}nguez-Conde and Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {speed09, title = {Secure Direct and Iterative Protocols for Solving Systems of Linear Equations}, booktitle = {Signal Processing in the Encrypted Domain (SPEED) Workshop}, year = {2009}, month = {September}, pages = {122{\textendash}141}, address = {Lausanne, Switzerland}, keywords = {iterative protocol, privacy, security, systems of linear equations, watermarking}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {icip09, title = {Skewed Log-Stable model for natural images pixel block-variance}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2009}, month = {November}, publisher = {IEEE}, organization = {IEEE}, address = {Cairo, Egypt}, keywords = {Doubly stochastic model, Image block-variance, Log-stable distribution, Lognormal distribution, watermarking}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {tifs08ss-security, title = {Spread spectrum watermarking security}, journal = {IEEE Transactions on Information Forensics and Security}, volume = {4}, number = {1}, year = {2009}, month = {March}, pages = {2-24}, keywords = {data-hiding, security, watermarking}, author = {Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {paperBroadbandWorkshop2009, title = {A Unified Framework for Dynamic Spectrum Leasing (DSL) in Cognitive Radios}, booktitle = {IEEE Broadband Wireless Access Workshop}, year = {2009}, note = {colocated with Globecom}, author = {Sudhaman K. Jayaweera and Kamrul Hakim and C. Mosquera} } @conference {drm09, title = {Videosurveillance and privacy: covering the two sides of the mirror with DRM}, booktitle = {ACM Workshop on Digital Rights Management (DRM)}, year = {2009}, month = {November}, publisher = {ACM}, organization = {ACM}, address = {Chicago, IL, USA}, keywords = {access control, privacy, rights management, security, videosurveillance, watermarking}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Pedro Comesa{\~n}a and Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {ValcarceVazquez2009, title = {Wideband Spectrum Sensing in Cognitive Radio: Joint Estimation of Noise Variance and Multiple Signal Levels}, booktitle = {IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC)}, year = {2009}, month = {June 21-24}, address = {Perugia, Italy}, author = {R. L{\'o}pez-Valcarce and Gonzalo V{\'a}zquez-Vilar} } @conference {Furon2009:WCA, title = {Worst case attacks against binary probabilistic traitor tracing codes}, booktitle = {IEEE International Workshop on Information Forensics and Security (WIFS)}, year = {2009}, month = {6-9 December}, pages = {46-50}, address = {London, UK}, keywords = {collusion, information theory, Tardos, Traitor tracing, watermarking}, author = {Teddy Furon and Luis P{\'e}rez-Freire} } @conference {spie08, title = {Asymptotically optimum embedding strategy for one-bit watermarking under Gaussian attacks}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {6819}, year = {2008}, month = {January}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, CA, USA}, author = {Pedro Comesa{\~n}a and Neri Merhav and Mauro Barni}, editor = {Edward J. Delp and Ping W. Wong and Jana Dittmann and Nasir D. Memon} } @mastersthesis {Freire08thesis, title = {Digital Watermarking Security}, year = {2008}, school = {University of Vigo, Spain}, type = {phd}, keywords = {data-hiding, security, watermarking}, author = {Luis P{\'e}rez-Freire} } @conference {ih08, title = {Distortion Optimization of Model-Based Secure Embedding Schemes for Data-Hiding}, booktitle = {International Workshop on Information Hiding (IH)}, year = {2008}, month = {May}, address = {Santa Barbara, CA, U.S.A.}, keywords = {data hiding, Distortion Optimization, Secure Embedding}, author = {Benjamin Mathon and Patrick Bas and Fran{\c c}ois Cayre and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {Mosquera08a, title = {Distributed Estimation: Do Not Trust Gossips}, booktitle = {Sensor, Signal and Information Processing (SenSIP) Workshop}, year = {2008}, address = {Sedona (Arizona)}, keywords = {distributed estimation, sensor network}, author = {C. Mosquera and Sudhaman K. Jayaweera} } @conference {Mosquera08c, title = {Distributed Estimation with Noisy Exchanges}, booktitle = {IEEE International Workshop on Signal Processing Advances in Wireless Communications}, year = {2008}, address = {Recife, Brazil}, keywords = {distributed estimation, sensor network}, author = {C. Mosquera and R. L{\'o}pez-Valcarce and Sudhaman K. Jayaweera} } @article {MosqueraSPL08, title = {Distributed Sequential Estimation with Noisy, Correlated Observations}, journal = {IEEE Signal Processing Letters}, volume = {15}, year = {2008}, author = {Sudhaman K. Jayaweera and C. Mosquera} } @conference {Mosquera08b, title = {Entangled Kalman Filters for Cooperative Estimation}, booktitle = {IEEE Sensor Array and Multichannel Signal Processing Workshop}, year = {2008}, address = {Darmstadt (Germany)}, keywords = {distributed estimation, sensor network}, author = {C. Mosquera and Sudhaman K. Jayaweera} } @conference {ElasmiEUSIPCO08, title = {A family of frequency estimators using higher-order sample covariance lags for real sinusoid detection}, booktitle = {European Signal Processing Conference (EUSIPCO)}, year = {2008}, month = {August}, address = {Lausanne, Switzerland}, keywords = {Frequency estimator, Sinusoid detection}, author = {R. Elasmi-Ksibi and R. L{\'o}pez-Valcarce and H. Besbes and S. Cherif and M. Jaidane} } @conference {SalemEUSIPCO08, title = {Lattice implementation of Sum-squared Auto-correlation Minimization (SAM) channel shortener}, booktitle = {European Signal Processing Conference (EUSIPCO)}, year = {2008}, month = {August}, address = {Lausanne, Switzerland}, keywords = {Blind Adaptation, Lattice, SAM}, author = {E. Ben Salem and R. L{\'o}pez-Valcarce and S. Cherif and H. Besbes} } @conference {ValcarceMosquera08a, title = {Maximum Likelihood SNR Estimation for Asynchronously Oversampled OFDM Signals}, booktitle = {IEEE International Workshop on Signal Processing Advances in Wireless Communications}, year = {2008}, address = {Recife, Brazil}, keywords = {estimation, ML, OFDM, SNR}, author = {R. L{\'o}pez-Valcarce and C. Mosquera} } @conference {GappmairCNSDSP08, title = {ML and EM Algorithm for non-data-aided SNR Estimation of Linearly Modulated Signals}, booktitle = {International Symposium on Communication Systems, Networks and Signal Processing (CNSDSP)}, year = {2008}, pages = {530-534}, keywords = {EM, ML, SNR estimation}, author = {Wilfried Gappmair and R. L{\'o}pez-Valcarce and C. Mosquera} } @article {MosqueraTSP07, title = {Non-Data-Aided Symbol Rate Estimation of Linearly Modulated Signals}, journal = {IEEE Transactions on Signal Processing}, year = {2008}, month = {February}, author = {C. Mosquera and Sandro Scalise and R. L{\'o}pez-Valcarce} } @article {PerezMosqueraTIFS08, title = {Quantization-Based Data-Hiding Robust to Linear Time-Invariant Filtering}, journal = {IEEE Transactions on Information Forensics and Security}, volume = {3}, number = {2}, year = {2008}, month = {June}, pages = {137-152}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and C. Mosquera} } @article {VilaForcen08TDHMS, title = {Quantization-Based Methods: Additive Attacks Performance Analysis}, journal = {Transactions on Data Hiding and Multimedia Security III}, volume = {4920}, year = {2008}, pages = {70-90}, keywords = {data-hiding, watermarking}, author = {Jose Emilio Vila-Forc{\'e}n and Sviatoslav Voloshynovskiy and Oleksiy Koval and Fernando P{\'e}rez-Gonz{\'a}lez and Thierry Pun} } @article {tifs08dcdm, title = {Security of lattice-based data hiding against the Watermarked Only Attack}, journal = {IEEE Transactions on Information Forensics and Security}, volume = {3}, number = {4}, year = {2008}, month = {December}, pages = {593-610}, keywords = {data-hiding, security, watermarking}, author = {Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {ASMS08, title = {SNR Estimation with Heterogeneous Frames}, booktitle = {Advanced Satellite Mobile Systems Conference}, year = {2008}, month = {August 26-28}, address = {Bologna, Italy}, author = {Marcos {\'A}lvarez-D{\'\i}az and R. L{\'o}pez-Valcarce and C. Mosquera} } @conference {icip07benford, title = {Benford{\textquoteright}s Law in Image Processing}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2007}, month = {September}, address = {San Antonio, TX, USA}, keywords = {benford, benford{\textquoteright}s-law}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and Gregory L. Heileman and Chaouki T. Abdallah} } @article {jis07bows, title = {Breaking the BOWS Watermarking System: Key Guessing and Sensitivity Attacks}, journal = {EURASIP Journal on Information Security}, volume = {2007}, number = {2}, year = {2007}, note = {Vol 2007, Article ID 25308, 8 pages. doi:10.1155/2007/25308. Source code available here}, month = {February}, keywords = {data-hiding, oracle, sensitivity, watermarking}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {acm07pedro, title = {On the capacity of stegosystems}, booktitle = {ACM Workshop on Multimedia and Security (MMSEC)}, year = {2007}, month = {September}, pages = {1261-1264}, address = {Dallas, TX, USA}, keywords = {data-hiding, steganography, watermarking}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @book {Artes07book, title = {Comunicaciones Digitales}, year = {2007}, month = {May}, publisher = {Pearson - Prentice Hall}, organization = {Pearson - Prentice Hall}, author = {Antonio Art{\'e}s-Rodr{\'\i}guez and Fernando P{\'e}rez-Gonz{\'a}lez and Jes{\'u}s Cid-Sueiro and R. L{\'o}pez-Valcarce and C. Mosquera and Fernando P{\'e}rez-Cruz} } @inbook {Mosquera07sat, title = {Digital Satellite Communications}, year = {2007}, publisher = {Springer}, organization = {Springer}, chapter = {Parameter Estimation and Synchronization}, author = {C. Mosquera and M. L. Boucheret and M. Bousquet and S. Cioni and Wilfried Gappmair and R. Pedone and Sandro Scalise and P. Skoutaridis and M. Villanti} } @inbook {Pedone07sat, title = {Digital Satellite Communications}, year = {2007}, publisher = {Springer}, organization = {Springer}, chapter = {Theoretical Background}, author = {R. Pedone and G. Albertazzi and P.T. Mathiopoulos and C. Mosquera and N. Sagias and M. Villanti} } @inbook {Chap8_Book_Corazza07, title = {Digital Satellite Communications}, year = {2007}, month = {April}, pages = {-}, publisher = {Springer}, organization = {Springer}, chapter = {Distortion Countermeasures}, address = {New York}, author = {A. A. Rontogiannis and Marcos {\'A}lvarez-D{\'\i}az and M. Casadei and V. Dalakas and A. Duverdier and F. J. Gonz{\'a}lez-Serrano and M. Iubatti and T. Javornik and L. Lapierre and Neri, Massimo and P. Salmi} } @inbook {Chap4_Book_Corazza07, title = {Digital Satellite Communications}, year = {2007}, month = {April}, pages = {-}, publisher = {Springer}, organization = {Springer}, chapter = {Satellite Channel Impairments}, address = {New York}, author = {Sandro Scalise and L. Castanet and M. Luglio and Neri, Massimo and Marcos {\'A}lvarez-D{\'\i}az and J. Bito and M. Bousquet and I. Frigyes and P. Horvath and Axel Jahn and M. Krejcarek and J. Lemorton and S. Morosi and M. A. V{\'a}zquez-Castro} } @conference {wacha07, title = {Disclosing secrets in watermarking and data hiding}, booktitle = {Third Wavila Challenge (WaCha)}, series = {ECRYPT proceedings series from the Otto-von-Guericke University, Magdeburg, Germany}, year = {2007}, month = {14 June}, address = {Saint-Malo, France}, keywords = {data-hiding, security, watermarking}, author = {Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {spie07:dist-measures, title = {On Distortion Measures Associated to Random Desynchronization Attacks}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, year = {2007}, month = {January}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {data-hiding, desynchronization, watermarking}, author = {F{\'e}lix Balado and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Edward J. Delp and Ping W. Wong} } @conference {iwdw07pedro, title = {Dither modulation in the logarithmic domain}, booktitle = {International Workshop on Digital Watermarking (IWDW)}, year = {2007}, month = {December}, pages = {1261-1264}, address = {Guangzhou, China}, keywords = {data-hiding, watermarking}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {spie07:zero-knowledge, title = {Efficient Non-Interactive Zero-Knowledge Watermark Detector Robust to Sensitivity Attacks}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, year = {2007}, month = {January}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {data-hiding, sensitivity, watermarking, zero-knowledge}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Edward J. Delp and Ping W. Wong} } @article {zkwd-eurasipjis-sped07, title = {Efficient Zero-Knowledge Watermark Detection with Improved Robustness to Sensitivity Attacks}, journal = {EURASIP Journal on Information Security}, year = {2007}, note = {Special Issue on Signal Processing in the Encrypted Domain}, keywords = {data-hiding, sensitivity, watermarking, zero-knowledge}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {ih07, title = {Exploiting security holes in lattice data hiding}, booktitle = {International Workshop on Information Hiding (IH)}, series = {Lecture Notes in Computer Science}, year = {2007}, month = {11-13 June}, publisher = {Springer-Verlag Heidelberg}, organization = {Springer-Verlag Heidelberg}, address = {Saint-Malo, France}, keywords = {data-hiding, security, watermarking}, author = {Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {672, title = {Fast-fading channel estimator using DCT and simplified kalman filter}, booktitle = {Signal Processing Advances in Wireless Communications, 2007. SPAWC 2007. IEEE 8th Workshop on}, year = {2007}, month = {june}, pages = {1 -5}, keywords = {band-pass filters, basis function approximations, channel coefficient, channel Doppler spectrum, channel estimation, channel estimator, channel variations, decoupled parameters, discrete cosine transform, discrete cosine transforms, Doppler effect, fading channels, fast-fading channel, Kalman filter, Kalman filters, low complexity estimator, narrow-band filters, passband filters, training symbols}, doi = {10.1109/SPAWC.2007.4401355}, author = {Schmidt, J.F. and Cousseau, J.E. and Wichman, R. and Gregorio, F.H.} } @conference {ecc07benford, title = {A Generalization of Benford{\textquoteright}s Law and Its Application to Images}, booktitle = {European Control Conference (ECC)}, year = {2007}, month = {July}, address = {Kos, Greece}, keywords = {benford, benford{\textquoteright}s-law}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and Gregory L. Heileman and Chaouki T. Abdallah} } @conference {ValcarceSPAWC07, title = {Iterative Envelope-Based SNR Estimation for Non-Constant Modulus Constellations}, booktitle = {IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC)}, year = {2007}, keywords = {EM, SNR, synchronization}, author = {R. L{\'o}pez-Valcarce and C. Mosquera and Wilfried Gappmair} } @conference {icip07dani, title = {Modeling Gabor coefficients via Generalized Gaussian Distributions for face recognition}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2007}, month = {September}, pages = {1261-1264}, address = {San Antonio, TX, USA}, keywords = {biometrics, face-recognition}, author = {Daniel Gonz{\'a}lez-Jim{\'e}nez and Fernando P{\'e}rez-Gonz{\'a}lez and Pedro Comesa{\~n}a and Luis P{\'e}rez-Freire and Jos{\'e} Luis Alba-Castro} } @conference {IWSSC07, title = {Non-Linear Interference Mitigation for Broadband Multimedia Satellite Systems}, booktitle = {International Workshop on Satellite and Space Communications (IWSSC)}, year = {2007}, month = {September 13-14}, address = {Salzburg, Austria}, author = {Marcos {\'A}lvarez-D{\'\i}az and Nicolas Courville and C. Mosquera and Gianluigi Liva and Giovanni Emanuele Corazza} } @conference {spie07:auth, title = {A Novel Interpretation of Content Authentication}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, year = {2007}, month = {January}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {authentication, data-hiding, watermarking}, author = {Pedro Comesa{\~n}a and F{\'e}lix Balado and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Edward J. Delp and Ping W. Wong} } @booklet {Freire07report, title = {Practical estimators of the secret spreading vector for Improved Spread Spectrum modulations. Statistical analysis and results}, year = {2007}, month = {November}, publisher = {Signal Theory and Communications Department, University of Vigo, Spain}, type = {Internal report}, keywords = {data-hiding, security, watermarking}, author = {Luis P{\'e}rez-Freire} } @conference {troncosoccs07, title = {Privacy Preserving Error Resilient DNA Searching through Oblivious Automata}, booktitle = {ACM Conference on Computer and Communications Security (CCS)}, year = {2007}, month = {Oct 29{\textendash}Nov 2}, pages = {519{\textendash}528}, publisher = {ACM Press}, organization = {ACM Press}, address = {Alexandria, Virginia, USA}, keywords = {DNA, privacy, security, watermarking}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Stefan Katzenbeisser and Mehmet Celik} } @conference {Reproducible07, title = {Putting Reproducible Signal Processing into Practice: A Case Study in Watermarking}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, volume = {4}, year = {2007}, month = {April}, pages = {1261-1264}, address = {Honolulu, HW, USA}, keywords = {data-hiding, watermarking}, author = {Mauro Barni and Fernando P{\'e}rez-Gonz{\'a}lez and Pedro Comesa{\~n}a and Guido Bartoli} } @conference {MosqueraIWSSC07, title = {Satellite Communications: Research Trends and Open Issues}, booktitle = {International Workshop on Satellite and Space Communications (IWSSC)}, year = {2007}, keywords = {satellite communications}, author = {Alessandro Vanelli-Coralli and Giovanni Emanuele Corazza and G.K. Karagiannidis and P.T. Mathiopoulos and D.S. Michalopoulos and C. Mosquera and S. Papaharalabos and Sandro Scalise} } @conference {mmsec07-spedpoint, title = {A Secure Multidimensional Point Inclusion Protocol}, booktitle = {ACM Workshop on Multimedia and Security (MMSEC)}, year = {2007}, month = {September}, pages = {109{\textendash}120}, address = {Dallas, Texas, USA}, keywords = {multiparty computation, privacy, security, watermarking}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Stefan Katzenbeisser and Mehmet Celik and Aweke Lemma} } @conference {spie07:security, title = {Security of Spread-Spectrum-Based Data Hiding}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, year = {2007}, month = {January}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {data-hiding, security, watermarking}, author = {Luis P{\'e}rez-Freire and Pierre Moulin and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Edward J. Delp and Ping W. Wong} } @article {ValcarceCL07, title = {Sixth-Order Statistics-Based Non-Data-Aided SNR Estimation}, journal = {IEEE Communications Letters}, volume = {11}, number = {4}, year = {2007}, month = {April}, pages = {351-353}, author = {R. L{\'o}pez-Valcarce and C. Mosquera} } @conference {icip07boato, title = {Statistical Analysis of a Linear Algebra Asymmetric Watermarking Scheme}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2007}, month = {September}, pages = {1261-1264}, address = {San Antonio, TX, USA}, keywords = {watermarking}, author = {G. Boato and C. Fontanari and F. G. B. De Natale and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {spie07:bows, title = {Two different approaches for attacking BOWS}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, year = {2007}, month = {January}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {BOWS, data-hiding, sensitivity, watermarking}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Edward J. Delp and Ping W. Wong} } @conference {icip07pedro, title = {On a watermarking scheme in the logarithmic domain and its perceptual advantages}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2007}, month = {September}, pages = {1261-1264}, address = {San Antonio, TX, USA}, keywords = {data-hiding, watermarking}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {tifs06SCS, title = {An accurate analysis of scalar quantization-based data-hiding}, journal = {IEEE Transactions on Information Forensics and Security}, volume = {1}, number = {1}, year = {2006}, month = {March}, pages = {80-86}, keywords = {data-hiding, security, watermarking}, author = {Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez and Sviatoslav Voloshynovskiy} } @conference {acm06:kma, title = {On achievable security levels for lattice data hiding in the Known Message Attack scenario}, booktitle = {ACM Workshop on Multimedia and Security (MMSEC)}, year = {2006}, month = {September}, pages = {68-79}, publisher = {ACM}, organization = {ACM}, address = {Geneva, Switzerland}, keywords = {data-hiding, security, watermarking}, author = {Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez and Teddy Furon} } @conference {uvigo:gainestimation, title = {Analysis of non-data-aided magnitude gain estimators}, booktitle = {International Symposium on Image/Video Communications (ISIVC)}, year = {2006}, address = {Hammamet, Tunisia}, keywords = {Digital Communications, gain estimation, synchronization}, author = {R. L{\'o}pez-Valcarce} } @conference {uvigo:gaussphase, title = {Blind carrier phase estimation for non-equiprobable constellations}, booktitle = {IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC)}, year = {2006}, address = {Cannes, France}, keywords = {Digital Communications, phase estimation, signal shaping, synchronization, Tomlinson-Harashima precoding}, author = {R. L{\'o}pez-Valcarce and C. Mosquera} } @article {pis06:bnsa, title = {Blind Newton Sensitivity Attack}, journal = {IEE Proceedings on Information Security}, volume = {153}, number = {3}, year = {2006}, note = {To appear}, month = {September}, pages = {115-125}, keywords = {data-hiding, watermarking}, author = {Pedro Comesa{\~n}a and Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {spie06:sensitivity, title = {The blind Newton senstivity attack}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {5306}, year = {2006}, month = {January}, pages = {592-601}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {data-hiding, watermarking}, author = {Pedro Comesa{\~n}a and Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Edward J. Delp and Ping W. Wong} } @article {tsp05dcdm, title = {On distortion-compensated Dither Modulation data-hiding with repetition coding}, journal = {IEEE Transactions on Signal Processing}, volume = {54}, number = {2}, year = {2006}, month = {February}, pages = {585-600}, keywords = {data-hiding, watermarking}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez and F{\'e}lix Balado} } @conference {spie05:dftrdm, title = {High-rate quantization data hiding robust to arbitrary linear filtering attacks}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {5306}, year = {2006}, month = {January}, pages = {592-601}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and C. Mosquera and Marcos {\'A}lvarez-D{\'\i}az and Reginald Lagendijk}, editor = {Edward J. Delp and Ping W. Wong} } @article {spl06:cropping, title = {The impact of the cropping attack on scalar STDM data hiding}, journal = {IEEE Signal Processing Letters}, volume = {13}, number = {6}, year = {2006}, note = {To appear}, month = {June}, pages = {353-356}, keywords = {data-hiding, watermarking}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {abrardo06, title = {Improving the performance of RDM watermarking by means of trellis coded quantisation}, journal = {IEE Proceedings on Information Security}, volume = {153}, number = {3}, year = {2006}, month = {September}, pages = {107-114}, keywords = {data-hiding, watermarking}, author = {Andrea Abrardo and Mauro Barni and Fernando P{\'e}rez-Gonz{\'a}lez and C. Mosquera} } @conference {malvido06barcodes, title = {A novel model for the print-and-capture channel in 2D bar codes}, booktitle = {International Workshop on Multimedia Content Representation, Classification and Security}, series = {Lecture Notes in Computer Science}, volume = {4105}, year = {2006}, month = {September}, pages = {627-634}, publisher = {Springer-Verlag Heidelberg}, organization = {Springer-Verlag Heidelberg}, address = {Istambul, Turkey}, keywords = {bar-codes, visible-encryption}, author = {Alberto Malvido and Fernando P{\'e}rez-Gonz{\'a}lez and Armando Cousi{\~n}o}, editor = {Bilge Gunsel and Anil K. Jain and A. Murat Tekalp and B{\"u}lent Sankur} } @article {oleksiy06, title = {Robustness Improvement of Known-Host-State Watermarking Using Host Statistics}, journal = {Signal Processing}, volume = {86}, number = {5}, year = {2006}, month = {May}, pages = {1076-1088}, keywords = {data-hiding, watermarking}, author = {Oleksiy Koval and Sviatoslav Voloshynovskiy and Jose Emilio Vila-Forc{\'e}n and Fernando P{\'e}rez-Gonz{\'a}lez and Frederic Deguillaume and Thierry Pun} } @article {uvigo:sosblind, title = {Second-order blind algorithms for adaptive recursive linear equalizers: Analysis and lattice implementation}, journal = {International Journal of Adaptive Control and Signal Processing}, volume = {20}, number = {6}, year = {2006}, month = {August}, pages = {265{\textendash}289}, keywords = {adaptive IIR filters, blind equalization, Digital Communications, lattice filters}, author = {R. L{\'o}pez-Valcarce} } @conference {spie06:sme, title = {Secret dither estimation in lattice-quantization data hiding: a set-membership approach}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {5306}, year = {2006}, month = {January}, pages = {592-601}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {data-hiding, security, watermarking}, author = {Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez and Pedro Comesa{\~n}a}, editor = {Edward J. Delp and Ping W. Wong} } @article {tifs06security, title = {Security of lattice-based data hiding against the Known Message Attack}, journal = {IEEE Transactions on Information Forensics and Security}, volume = {1}, number = {4}, year = {2006}, month = {December}, pages = {421-439}, keywords = {data-hiding, security, watermarking}, author = {Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez and Teddy Furon and Pedro Comesa{\~n}a} } @mastersthesis {Comesana06thesis, title = {Side-informed data hiding: robustness and security analysis}, year = {2006}, school = {University of Vigo, Spain}, type = {phd}, keywords = {data-hiding, watermarking}, author = {Pedro Comesa{\~n}a} } @conference {Mosquera06, title = {Symbol-Rate Estimation for DVB-S2 Broadcasting}, booktitle = {International Workshop on Signal Processing for Space Communications (SPSC)}, year = {2006}, keywords = {DVB, symbol rate, synchronization}, author = {C. Mosquera and Sandro Scalise and R. L{\'o}pez-Valcarce} } @conference {uvigo:nlpoly, title = {Toward a theory of multirate nonlinear systems}, booktitle = {IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC)}, year = {2006}, address = {Cannes, France}, keywords = {multirate systems, nonlinear filters, polyphase filters}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} } @conference {Alvarez06, title = {Trellis Shaping Techniques for Satellite Telecommunication Systems}, booktitle = {International Workshop on Satellite and Space Communications (IWSSC)}, year = {2006}, month = {September}, address = {Legan{\'e}s, Spain}, keywords = {Digital Communications, precoding, satellite communications}, author = {Marcos {\'A}lvarez-D{\'\i}az and Neri, Massimo and C. Mosquera and Giovanni Emanuele Corazza} } @article {uvigo:survey-sec, title = {Watermarking security: a survey}, journal = {Transactions on Data Hiding and Multimedia Security I}, volume = {4300}, year = {2006}, month = {October}, pages = {41-72}, keywords = {data-hiding, security, watermarking}, author = {Luis P{\'e}rez-Freire and Pedro Comesa{\~n}a and Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {acm06zk, title = {Zero-Knowledge watermark detector robust to sensitivity attacks}, booktitle = {ACM Workshop on Multimedia and Security (MMSEC)}, year = {2006}, month = {September}, pages = {97-107}, publisher = {ACM}, organization = {ACM}, address = {Geneva, Switzerland}, keywords = {data-hiding, watermarking, zero-knowledge}, author = {Juan Ram{\'o}n Troncoso-Pastoriza and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {ICSSC{\textquoteright}05, title = {Aeronautical Channel Model for Broadband L-Band Satellite Communication}, booktitle = {AIAA International Communications Satellite Systems Conference (ICSSC)}, year = {2005}, month = {September 25-28}, address = {Rome, Italy}, keywords = {Digital Communications, L-Band, satellite communications}, author = {Madhavendra Richharia and Naveen Kaluvala and Panos Fines and Marcos {\'A}lvarez-D{\'\i}az and Axel Jahn} } @conference {uvigo:firstorder, title = {Analysis of a first-order adaptive recursive predictor}, booktitle = {IEEE Conference on Decision and Control / European Control Conference (CDC/ECC)}, year = {2005}, address = {Seville, Spain}, keywords = {adaptive signal processing, equalization, second-order statistics}, doi = {10.1109/CDC.2005.1582919}, author = {R. L{\'o}pez-Valcarce} } @conference {spie05:dpc, title = {Applying Erez and Ten Brink{\textquoteright}s Dirty Paper Codes to Data-Hiding}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {5306}, year = {2005}, month = {January}, pages = {592-601}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {data-hiding, watermarking}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez and Frans M. J. Willems}, editor = {Edward J. Delp and Ping W. Wong} } @conference {spie05:security, title = {Detection in quantization-based watermarking: performance and security issues}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {5306}, year = {2005}, month = {January}, pages = {592-601}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {data-hiding, security, watermarking}, author = {Luis P{\'e}rez-Freire and Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Edward J. Delp and Ping W. Wong} } @conference {uvigo:diamond, title = {Diamond contour-based phase recovery for (cross-)QAM constellations}, booktitle = {IEEE Workshop on Statistical Signal Processing (SSP)}, year = {2005}, address = {Bordeaux, France}, keywords = {adaptive signal processing, synchronization}, doi = {10.1109/SSP.2005.1628678}, author = {Marcos {\'A}lvarez-D{\'\i}az and R. L{\'o}pez-Valcarce} } @conference {spie05:rdm, title = {Ensuring Gain Invariance in High-Rate Data-Hiding}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {5306}, year = {2005}, month = {January}, pages = {592-601}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and C. Mosquera and Mauro Barni and Andrea Abrardo}, editor = {Edward J. Delp and Ping W. Wong} } @conference {ih05_fundamentals, title = {Fundamentals of data hiding security and their application to spread-spectrum analysis}, booktitle = {International Workshop on Information Hiding (IH)}, series = {Lecture Notes in Computer Science}, volume = {3727}, year = {2005}, month = {June}, pages = {131-145}, publisher = {Springer-Verlag Heidelberg}, organization = {Springer-Verlag Heidelberg}, address = {Barcelona, Spain}, keywords = {data-hiding, watermarking}, author = {Pedro Comesa{\~n}a and Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Mauro Barni and Jordi Herrera-Joancomart{\'\i} and Stefan Katzenbeisser and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {ih05_sideinformed, title = {Information-theoretic analysis of security in side-informed data hiding}, booktitle = {International Workshop on Information Hiding (IH)}, series = {Lecture Notes in Computer Science}, volume = {3727}, year = {2005}, note = {6-8 June}, pages = {131-145}, publisher = {Springer-Verlag Heidelberg}, organization = {Springer-Verlag Heidelberg}, keywords = {data-hiding, security, watermarking}, author = {Luis P{\'e}rez-Freire and Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Mauro Barni and Jordi Herrera-Joancomart{\'\i} and Stefan Katzenbeisser and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {wiamis05, title = {An information-theoretic framework for assessing security in practical watermarking and data hiding scenarios}, booktitle = {International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS)}, year = {2005}, month = {April}, address = {Montreux, Switzerland}, keywords = {data-hiding, security, watermarking}, author = {Pedro Comesa{\~n}a and Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {ch08_AlNeMoCo_05_a, title = {Joint precoding and predistortion techniques for satellite telecommunication systems}, booktitle = {International Workshop on Satellite and Space Communications (IWSSC)}, year = {2005}, month = {September}, address = {Siena, Italy}, keywords = {Digital Communications, precoding, satellite communications} } @article {uvigo:tsp-rdm, title = {Rational Dither Modulation: a high-rate data-hiding method robust to gain attacks}, journal = {IEEE Transactions on Signal Processing}, volume = {53}, number = {10}, year = {2005}, note = {Third supplement on secure media}, month = {October}, pages = {3960-3975}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and C. Mosquera and Mauro Barni and Andrea Abrardo} } @article {uvigo:shorteners, title = {Realizable minimum mean-squared error channel shorteners}, journal = {IEEE Transactions on Signal Processing}, volume = {53}, number = {11}, year = {2005}, month = {November}, pages = {4354{\textendash}4362}, keywords = {adaptive signal processing, Channel shortening}, doi = {10.1109/TSP.2005.857050}, author = {R. L{\'o}pez-Valcarce} } @conference {iwdw05, title = {The return of the sensitivity attack}, booktitle = {International Workshop on Digital Watermarking (IWDW)}, series = {Lecture Notes in Computer Science}, volume = {3710}, year = {2005}, month = {September}, pages = {260-274}, publisher = {Springer-Verlag Heidelberg}, organization = {Springer-Verlag Heidelberg}, address = {Siena, Italy}, keywords = {data-hiding, watermarking}, author = {Pedro Comesa{\~n}a and Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Mauro Barni and Ingemar J. Cox and Ton Kalker and H. J. Kim} } @conference {cms05, title = {On reversibility of random binning techniques: multimedia perspectives}, booktitle = {Conference on Communications and Multimedia Security (CMS)}, series = {Lecture Notes in Computer Science}, year = {2005}, month = {September}, publisher = {Springer-Verlag Heidelberg}, organization = {Springer-Verlag Heidelberg}, address = {Salzburg, Austria}, keywords = {data-hiding, watermarking}, author = {Sviatoslav Voloshynovskiy and Oleksiy Koval and E. Topak and Jose Emilio Vila-Forc{\'e}n and Pedro Comesa{\~n}a and Thierry Pun} } @conference {spie05:dzq, title = {Robustness Improvement of Known-Host-State Watermarking Using Host Statistics}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {5306}, year = {2005}, month = {January}, pages = {592-601}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {data-hiding, watermarking}, author = {Oleksiy Koval and Sviatoslav Voloshynovskiy and Frederic Deguillaume and Fernando P{\'e}rez-Gonz{\'a}lez and Thierry Pun}, editor = {Edward J. Delp and Ping W. Wong} } @conference {spie05:scs, title = {Spread-spectrum vs. quantization-based data hiding: misconceptions and implications}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {5306}, year = {2005}, month = {January}, pages = {592-601}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {data-hiding, watermarking}, author = {Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Edward J. Delp and Ping W. Wong} } @conference {spie05:wca, title = {Worst case additive attack against quantization-based data-hiding methods}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {5306}, year = {2005}, month = {January}, pages = {592-601}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {data-hiding, watermarking}, author = {Jose Emilio Vila-Forc{\'e}n and Sviatoslav Voloshynovskiy and Oleksiy Koval and Fernando P{\'e}rez-Gonz{\'a}lez and Thierry Pun}, editor = {Edward J. Delp and Ping W. Wong} } @conference {uvigo:bias, title = {Bias analysis and removal of a microphone array based road traffic speed estimator}, booktitle = {European Signal Processing Conference (EUSIPCO)}, year = {2004}, address = {Vienna, Austria}, keywords = {microphone arrays, speed estimation, traffic monitoring}, author = {R. L{\'o}pez-Valcarce and D. Hurtado and C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {uvigo:laguerre, title = {Blind input, initial state, and system identification of SIMO Laguerre systems}, journal = {IEEE Transactions on Signal Processing}, volume = {52}, number = {12}, year = {2004}, month = {December}, pages = {3357{\textendash}3369}, keywords = {blind identification, blind input estimation, Laguerre systems, system identification}, doi = {10.1109/TSP.2004.837438}, author = {Jacob H. Gunther and R. L{\'o}pez-Valcarce} } @conference {spie04EM, title = {Blind iterative decoding of side-informed data hiding using the Expectation-Maximization algorithm}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {5306}, year = {2004}, month = {January}, pages = {805-815}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {data-hiding, watermarking}, author = {F{\'e}lix Balado and Fernando P{\'e}rez-Gonz{\'a}lez and Pedro Comesa{\~n}a}, editor = {Edward J. Delp and Ping W. Wong} } @conference {wiamis04:turbodec, title = {Blind Turbo Decoding of Side-Informed Data Hiding Using Iterative Channel Estimation}, booktitle = {International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS)}, year = {2004}, month = {April}, address = {Lisboa}, keywords = {data-hiding, watermarking}, author = {F{\'e}lix Balado and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {uvigo:broadband, title = {Broadband analysis of a microphone array based road traffic speed estimator}, booktitle = {IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM)}, year = {2004}, address = {Sitges, Barcelona, Spain}, keywords = {microphone arrays, speed estimation, traffic monitoring}, doi = {10.1109/SAM.2004.1503005}, author = {R. L{\'o}pez-Valcarce} } @article {uvigo:fourthpower, title = {Cost minimisation interpretation of fourth power phase estimator and links to multimodulus algorithm}, journal = {IEE Electronics Letters}, volume = {40}, number = {4}, year = {2004}, month = {19 February}, pages = {278{\textendash}279}, keywords = {constant modulus, Digital Communications, equalization, multimodulus, phase estimation}, author = {R. L{\'o}pez-Valcarce} } @article {uvigo:speedestjnl, title = {Estimation of road vehicle speed using two omnidirectional microphones: a maximum likelihood approach}, journal = {EURASIP Journal of Applied Signal Processing}, volume = {2004}, number = {8}, year = {2004}, month = {August}, pages = {1059{\textendash}1077}, keywords = {microphone arrays, speed estimation, traffic monitoring}, author = {R. L{\'o}pez-Valcarce and C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {wiamis04:dm, title = {Improved Binary Dither-Modulation with perceptual constraints}, booktitle = {International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS)}, year = {2004}, month = {April}, address = {Lisboa, Portugal}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and Pedro Comesa{\~n}a} } @article {uvigo:boundary-processing, title = {Linear Boundary Extensions for Finite Length Signals and Paraunitary Two-Channel Filter Banks}, journal = {IEEE Transactions on Signal Processing}, volume = {52}, number = {11}, year = {2004}, month = {November}, pages = {3213-3226}, author = {M. Elena Dom{\'\i}nguez-Jim{\'e}nez and Nuria Gonz{\'a}lez-Prelcic} } @article {uvigo:teq, title = {Minimum delay spread TEQ design in multicarrier systems}, journal = {IEEE Signal Processing Letters}, volume = {11}, number = {8}, year = {2004}, month = {August}, pages = {682{\textendash}685}, keywords = {channel shortener, cyclic prefix, delay spread, Digital Communications, multicarrier communications, time domain equalizer}, doi = {10.1109/LSP.2004.831676}, author = {R. L{\'o}pez-Valcarce} } @conference {IEEEVTC{\textquoteright}04, title = {Performance of Coding and Synchronization Schemes for a DVB-S Based Air-Interface in the Railway Environment}, booktitle = {Vehicular Technology Conference (VTC)}, volume = {1}, year = {2004}, month = {May 17-19}, pages = {347-351}, address = {Milano, Italy}, keywords = {Digital Communications, DVB-S, satellite communications}, author = {Sandro Scalise and Giorgio Sciascia and Marcos {\'A}lvarez-D{\'\i}az and Harald Ernst and Rodolfo Mura} } @conference {Mosquera04a, title = {POLI-MAS: Power-Line Multichannel Audio System}, booktitle = {International Symposium on Power Line Communications and Its Applications (ISPLC)}, year = {2004}, keywords = {audio, multichannel, PLC}, author = {Fernando J. Mato-M{\'e}ndez and C. Mosquera} } @conference {spie04, title = {Quantifying Security Leaks in Spread Spectrum Data Hiding: A Game Theoretic Approach}, booktitle = {Security, Steganography, and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {5306}, year = {2004}, month = {January}, pages = {592-601}, publisher = {SPIE}, organization = {SPIE}, address = {San Jose, California, USA}, keywords = {data-hiding, watermarking}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Edward J. Delp and Ping W. Wong} } @conference {acm04, title = {Quantization-based watermarking performance improvement using host statistics: additive noise attack}, booktitle = {ACM Workshop on Multimedia and Security (MMSEC)}, year = {2004}, month = {September 20-21}, address = {Magdeburg, Germany}, author = {Oleksiy Koval and Sviatoslav Voloshynovskiy and Fernando P{\'e}rez-Gonz{\'a}lez and Frederic Deguillaume and Thierry Pun} } @conference {mmsp04:rdm, title = {Rational Dither Modulation: a novel data-hiding method robust to value-metric attacks}, booktitle = {IEEE International Workshop on Multimedia Signal Processing}, year = {2004}, month = {29 Sept - 1 Oct}, pages = {139-142}, address = {Siena, Italy}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and Mauro Barni and Andrea Abrardo and C. Mosquera} } @article {uvigo:realizable, title = {Realizable linear and decision feedback equalizers: properties and connections}, journal = {IEEE Transactions on Signal Processing}, volume = {52}, number = {3}, year = {2004}, note = {Recipient of a 2005 Best Paper Award of the IEEE Signal Processing Society}, month = {March}, pages = {757{\textendash}773}, keywords = {adaptive signal processing, channel equalization}, doi = {10.1109/TSP.2003.822360}, author = {R. L{\'o}pez-Valcarce} } @conference {mmsp04:scs, title = {Revealing the true achievable rates of Scalar Costa Scheme}, booktitle = {IEEE International Workshop on Multimedia Signal Processing}, year = {2004}, month = {29 Sept - 1 Oct}, pages = {203-206}, address = {Siena, Italy}, keywords = {data-hiding, watermarking}, author = {Luis P{\'e}rez-Freire and Fernando P{\'e}rez-Gonz{\'a}lez and Sviatoslav Voloshynovskiy} } @conference {eusipco04, title = {Spread Spectrum Watermarking for Real Images: Is Everything So Hopeless?}, booktitle = {European Signal Processing Conference (EUSIPCO)}, year = {2004}, month = {September 6-10}, address = {Vienna, Austria}, author = {Oleksiy Koval and Sviatoslav Voloshynovskiy and Fernando P{\'e}rez-Gonz{\'a}lez and Frederic Deguillaume and Thierry Pun} } @conference {mmsp04:worstcase, title = {Worst case additive attack against quantization-based watermarking techniques}, booktitle = {IEEE International Workshop on Multimedia Signal Processing}, year = {2004}, month = {29 Sept - 1 Oct}, pages = {135-138}, address = {Siena, Italy}, author = {Jose Emilio Vila-Forc{\'e}n and Sviatoslav Voloshynovskiy and Oleksiy Koval and Thierry Pun and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {uvigo:multipliers, title = {An algorithm for unit-norm equation-error system identification based on the method of multipliers}, journal = {IEEE Transactions on Signal Processing}, volume = {51}, number = {12}, year = {2003}, month = {December}, pages = {3080{\textendash}3085}, keywords = {adaptive IIR filters, equation error, system identification, unit-norm}, author = {R. L{\'o}pez-Valcarce} } @conference {uvigo:applicability, title = {On the applicability to correlated sources of a blind channel equalization method robust to order overestimation}, booktitle = {IFAC Symposium on System Identification}, year = {2003}, address = {Rotterdam, the Netherlands}, keywords = {correlated sources, Digital Communications, equalization, order overestimation, second-order statistics}, author = {R. L{\'o}pez-Valcarce} } @conference {uvigo:iterative, title = {Blind iterative decision feedback equalizers for block QAM transmission systems}, booktitle = {Baiona Workshop on Signal Processing in Communications}, year = {2003}, pages = {57{\textendash}62}, address = {Baiona, Pontevedra, Spain}, keywords = {blind equalization, decision feedback equalization, iterative equalization}, author = {R. L{\'o}pez-Valcarce} } @conference {IST{\textquoteright}03, title = {Characterization of the Railroad Satellite Channel within the FIFTH Project}, booktitle = {IST Mobile \& Wireless Communications Summit}, year = {2003}, month = {June 15-18}, address = {Aveiro, Portugal}, keywords = {Digital Communications, satellite communications}, author = {Sandro Scalise and Marcos {\'A}lvarez-D{\'\i}az and Giorgio Sciascia and Rodolfo Mura} } @mastersthesis {Balado03, title = {Digital image data hiding using side information}, year = {2003}, school = {University of Vigo, Spain}, type = {phd}, keywords = {data-hiding, watermarking}, author = {F{\'e}lix Balado} } @conference {icip03a, title = {Dither-Modulation Data hiding with distortion-compensation: exact performance analysis and an improved detector for JPEG attacks.}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2003}, publisher = {IEEE}, organization = {IEEE}, address = {Barcelona, Spain}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and Pedro Comesa{\~n}a and F{\'e}lix Balado} } @conference {Baiona{\textquoteright}03, title = {DVB-S Air Interface over Railroad Satellite Channel: Performance and Extensions}, booktitle = {Baiona Workshop on Signal Processing in Communications}, year = {2003}, month = {September 8-10}, address = {Baiona, Spain}, keywords = {Digital Communications, DVB-S, satellite communications}, author = {Marcos {\'A}lvarez-D{\'\i}az and Sandro Scalise and Giorgio Sciascia and Rodolfo Mura and Paolo Conforto and Harald Ernst} } @conference {Mosquera03c, title = {Feedback Timing Synchronization for IF-Sampled Systems}, booktitle = {International Workshop on Signal Processing for Space Communications (SPSC)}, year = {2003}, keywords = {PLC}, author = {C. Mosquera and M. Cacheda} } @conference {uvigo:hexagonal, title = {Hexagonal Quantizers are not Optimal for 2-D Data Hiding}, booktitle = {Security and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {5020}, year = {2003}, month = {jan}, address = {Santa Clara, USA}, keywords = {data-hiding, watermarking}, author = {F{\'e}lix Balado and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Ping W. Wong and Edward J. Delp} } @conference {iwdw03:invited, title = {The Importance of aliasing in structured quantization index modulation data hiding (invited lecture)}, booktitle = {International Workshop on Digital Watermarking (IWDW)}, series = {Lecture Notes in Computer Science}, volume = {2939 / 2004}, year = {2003}, month = {October}, pages = {1-17}, publisher = {Springer-Verlag Heidelberg}, organization = {Springer-Verlag Heidelberg}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {Mosquera03b, title = {Indoor Image Acquisition and Distribution System}, booktitle = {International Symposium on Power Line Communications and Its Applications (ISPLC)}, year = {2003}, keywords = {PLC}, author = {D. Fondo and M. Cacheda and C. Mosquera} } @conference {ASMS{\textquoteright}03, title = {Link Design for Satellite Based Services in the Fast Train Environment}, booktitle = {International Conference on Advanced Satellite Mobile Systems (ASMS)}, year = {2003}, month = {July 10-11}, address = {ESRIN, Frascati, Italy}, keywords = {Digital Communications, satellite communications}, author = {Sandro Scalise and Paolo Conforto and Marcos {\'A}lvarez-D{\'\i}az and Giorgio Sciascia and Rodolfo Mura and Harald Ernst} } @conference {ICSSC{\textquoteright}03, title = {Link Performance for Mobile Satellite Based Services in Ku-Band}, booktitle = {AIAA International Communications Satellite Systems Conference (ICSSC)}, year = {2003}, month = {April 15-19}, address = {Yokohama, Japan}, keywords = {Digital Communications, satellite communications}, author = {Giorgio Sciascia and Sandro Scalise and Harald Ernst and Marcos {\'A}lvarez-D{\'\i}az and Matthias Holzbock and Rodolfo Mura} } @conference {Mosquera03a, title = {A low complexity all-digital DS-SS transceiver for power-line communications}, booktitle = {International Symposium on Power Line Communications and Its Applications (ISPLC)}, year = {2003}, keywords = {DS-SS, modem, PLC}, author = {M. Ferreiro and M. Cacheda and C. Mosquera} } @conference {iwdw03, title = {Optimal Data-Hiding Strategies for Games with BER Payoffs}, booktitle = {International Workshop on Digital Watermarking (IWDW)}, series = {Lecture Notes in Computer Science}, volume = {2939 / 2004}, year = {2003}, month = {October}, pages = {101-116}, publisher = {Springer-Verlag Heidelberg}, organization = {Springer-Verlag Heidelberg}, keywords = {data-hiding, watermarking}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez and F{\'e}lix Balado}, editor = {Ton Kalker and Ingemar J. Cox and Yong Man Ro} } @conference {icip03, title = {Optimal Strategies for Spread-Spectrum and Quantized-Projection image data hiding games with BER Payoffs}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2003}, month = {sep}, publisher = {IEEE}, organization = {IEEE}, address = {Barcelona, Spain}, keywords = {data-hiding, watermarking}, author = {Pedro Comesa{\~n}a and Fernando P{\'e}rez-Gonz{\'a}lez and F{\'e}lix Balado} } @article {uvigo:existingandnew, title = {Performance Analysis of Existing and New Methods for Data Hiding with Known-Host Information in Additive Channels}, journal = {IEEE Transactions on Signal Processing}, volume = {51}, number = {4}, year = {2003}, note = {Special Issue on Signal Processing for Data Hiding in Digital Media \& Secure Content Delivery}, pages = {960-980}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and F{\'e}lix Balado and Juan R. Hern{\'a}ndez} } @conference {VTC{\textquoteright}04, title = {Performance of DVB-S Air-Interface over Land Mobile Satellite Channel at Ku-Band for Fast Trains}, booktitle = {International Workshop on Signal Processing for Space Communications (SPSC)}, year = {2003}, month = {September 24-26}, address = {Catania, Italia}, keywords = {Digital Communications, DVB-S, satellite communications}, author = {Marcos {\'A}lvarez-D{\'\i}az and Sandro Scalise and Giorgio Sciascia and Rodolfo Mura and Paolo Conforto and Vincenzo Schena and Harald Ernst} } @article {uvigo:nlpsk, title = {Second order statistical properties of nonlinearly distorted PSK signals}, journal = {IEEE Communications Letters}, volume = {7}, number = {7}, year = {2003}, month = {July}, pages = {323{\textendash}325}, keywords = {Digital Communications, equalization, nonlinear channels, PSK modulation, second-order statistics}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} } @article {uvigo:subband, title = {Subband hyperstable adaptive IIR filters}, journal = {IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing}, volume = {50}, number = {7}, year = {2003}, month = {July}, pages = {383{\textendash}389}, keywords = {adaptive IIR filters, subband adaptive filters, system identification}, author = {R. L{\'o}pez-Valcarce and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {uvigo:visible, title = {Visible Encryption: Using Paper as a Secure Channel}, booktitle = {Security and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {5020}, year = {2003}, address = {Santa Clara, USA}, keywords = {2-D-Bar-Codes, data-hiding, print-\&-scan, Two-dimensional-modulations, visible-encryption}, author = {Norberto Degara-Quintela and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Ping W. Wong and Edward J. Delp} } @article {uvigo:analysispilot, title = {Analysis of Pilot-Based Synchronization Algorithms for Watermarking of Still Images}, journal = {Signal Processing: Image Communication}, volume = {17}, number = {8}, year = {2002}, month = {September}, pages = {661-633}, keywords = {data-hiding, watermarking}, author = {Manuel Alvarez-Rodr{\'\i}guez and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {uvigo:prewhitened, title = {Analysis of the prewhitened constant modulus cost function}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, volume = {3}, year = {2002}, pages = {2641-2644}, address = {Orlando, FL, USA}, keywords = {constant modulus, Digital Communications, equalization}, author = {R. L{\'o}pez-Valcarce and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {uvigo:eigenvector, title = {Automatic delay selection in blind channel equalization: a prewhitening + eigenvector approach}, booktitle = {Asilomar Conference on Signals, Systems and Computers}, year = {2002}, address = {Pacific Grove, CA, USA}, keywords = {Digital Communications, equalization, higher-order statistics}, author = {R. L{\'o}pez-Valcarce and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {uvigo:staggered, title = {Channel equalization with staggered modulation formats}, booktitle = {IEEE International Conference on Digital Signal Processing (DSP)}, year = {2002}, pages = {769{\textendash}772}, address = {Santorini, Greece}, keywords = {Digital Communications, equalization, staggered modulation}, author = {R. L{\'o}pez-Valcarce} } @conference {uvigo:improvingdatahiding, title = {Improving Data Hiding Performance by Using Quantization in a Projected Domain}, booktitle = {IEEE International Conference on Multimedia and Expo (ICME)}, year = {2002}, month = {August}, address = {Lausanne, Switzerland}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and F{\'e}lix Balado} } @conference {uvigo:nothing, title = {Nothing But a Kiss: A Novel and Accurate Approach to Assessing the Performance of Multidimensional Distortion-Compensated Dither Modulation}, booktitle = {International Workshop on Information Hiding (IH)}, series = {Lecture Notes in Computer Science}, year = {2002}, month = {October}, publisher = {Springer-Verlag}, organization = {Springer-Verlag}, address = {Noorwijkerhout, The Netherlands}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and F{\'e}lix Balado} } @conference {Prelcic02b, title = {Polynomial extension method for size-limited paraunitary filter banks}, booktitle = {European Signal Processing Conference (EUSIPCO)}, year = {2002}, month = {September}, address = {Toulouse, France}, author = {M. Elena Dom{\'\i}nguez-Jim{\'e}nez and Nuria Gonz{\'a}lez-Prelcic} } @conference {uvigo:probably, title = {Provably or Probably Robust Data Hiding?}, booktitle = {IEEE International Conference on Multimedia and Expo (ICME)}, year = {2002}, month = {August}, address = {Lausanne, Switzerland}, keywords = {data-hiding, watermarking}, author = {F{\'e}lix Balado and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {uvigo:quantized, title = {Quantized Projection Data Hiding}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2002}, month = {September}, address = {Rochester (NY), USA}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and F{\'e}lix Balado} } @conference {uvigo:speedest, title = {Road vehicle speed estimation from a two-microphone array}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, volume = {2}, year = {2002}, pages = {1321{\textendash}1324}, address = {Orlando, FL, USA}, keywords = {microphone arrays, speed estimation, traffic monitoring}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and R. L{\'o}pez-Valcarce and C. Mosquera} } @conference {Prelcic02a, title = {Smooth Orthogonal Signal Extensions for Paraunitary Tree-structured Filter Banks}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2002}, month = {May}, address = {Orlando, USA}, author = {M. Elena Dom{\'\i}nguez-Jim{\'e}nez and Nuria Gonz{\'a}lez-Prelcic} } @conference {Mosquera02, title = {Spectral characterization of feedback linear periodically time-varying systems}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2002}, keywords = {burst, inversion, LPTV, PLL}, author = {C. Mosquera and Sandro Scalise and G. Taricco} } @mastersthesis {801, title = {Adaptive algorithms for identification and equalization using recursive filters}, volume = {Ph.D.}, year = {2001}, month = {11/2001}, school = {University of Vigo}, type = {Ph.D. thesis}, address = {Vigo, Spain}, keywords = {adaptive signal processing}, author = {R. L{\'o}pez-Valcarce} } @article {Mosquera01c, title = {Adaptive IIR Filters for Active Noise Control}, journal = {International Journal of Acoustics and Vibration}, volume = {6}, year = {2001}, pages = {3-10}, keywords = {ANC, IIR, SPR}, author = {C. Mosquera and J.A. G{\'o}mez and Fernando P{\'e}rez-Gonz{\'a}lez and M. Sobreira and E. Alexandre} } @article {uvigo:revisited, title = {Adaptive lattice IIR filtering revisited: convergence issues and new algorithms with improved stability properties}, journal = {IEEE Transactions on Signal Processing}, volume = {49}, number = {4}, year = {2001}, month = {April}, pages = {811{\textendash}821}, keywords = {adaptive IIR filters, lattice filters, system identification}, author = {R. L{\'o}pez-Valcarce and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {uvigo:audio-wavelets, title = {An adaptive tiling of the time-frequency plane with application to multiresolution-based perceptive audio coding}, journal = {Signal Processing}, volume = {81/2}, year = {2001}, month = {March}, pages = {301-319}, author = {Nuria Gonz{\'a}lez-Prelcic and Antonio S. Pena} } @article {Mosquera01b, title = {Algebraic solution to the robust SPR problem for two polynomials}, journal = {Automatica}, volume = {37}, year = {2001}, month = {may}, keywords = {robust, SPR}, author = {C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {uvigo:approaching, title = {Approaching the Capacity Limit in Image Watermarking: A Perspective on Coding Techniques for Data Hiding Applications}, journal = {Signal Processing}, volume = {81}, number = {6}, year = {2001}, note = {Special Section on Information Theoretic Aspects of Digital Watermarking}, month = {June}, pages = {1215{\textendash}1238}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and Juan R. Hern{\'a}ndez and F{\'e}lix Balado} } @article {uvigo:coloredjnl, title = {Blind channel equalization with colored sources based on second-order statistics: a linear prediction approach}, journal = {IEEE Transactions on Signal Processing}, volume = {49}, number = {9}, year = {2001}, month = {September}, pages = {2050{\textendash}2059}, keywords = {correlated sources, Digital Communications, equalization, second-order statistics}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} } @conference {uvigo:precoding, title = {Blind equalization of nonlinear channels from second order statistics using precoding and channel diversity}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, volume = {4}, year = {2001}, pages = {2073{\textendash}2076}, address = {Salt Lake City, UT, USA}, keywords = {Digital Communications, equalization, nonlinear channels}, author = {R. L{\'o}pez-Valcarce and Xuejie Song and Soura Dasgupta} } @article {uvigo:nonlinear01, title = {Blind Equalization of Nonlinear Channels from Second-Order Statistics}, journal = {IEEE Transactions on Signal Processing}, volume = {49}, number = {12}, year = {2001}, month = {December}, pages = {3084{\textendash}3097}, keywords = {Digital Communications, equalization, nonlinear channels, second-order statistics}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} } @conference {uvigo:psk, title = {Blind equalization of nonlinear digital satellite links with PSK modulation}, booktitle = {IEEE International Symposium on Circuits and Systems (ISCAS)}, volume = {2}, year = {2001}, pages = {409{\textendash}412}, address = {Sydney, Australia}, keywords = {Digital Communications, equalization, nonlinear channels, second-order statistics}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} } @conference {uvigo:deficient, title = {On blind equalization of rank deficient nonlinear channels}, booktitle = {IEEE Workshop on Statistical Signal Processing (SSP)}, year = {2001}, pages = {269{\textendash}272}, address = {Singapore}, keywords = {Digital Communications, equalization, nonlinear channels}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} } @conference {Prelcic01a, title = {A Channel Model for the Galician Low Voltage Main Network}, booktitle = {International Symposium on Power Line Communications and Its Applications (ISPLC)}, year = {2001}, month = {April}, address = {Malmo, Sweden}, author = {Nuria Gonz{\'a}lez-Prelcic and C. Mosquera and Norberto Degara-Quintela and A. Currais} } @conference {uvigo:samplelevel, title = {Coding at the Sample Level for Data Hiding: Turbo and Concatenated Codes}, booktitle = {Security and Watermarking of Multimedia Contents}, series = {Proc. of SPIE}, volume = {4314}, year = {2001}, month = {January}, pages = {532{\textendash}543}, address = {San Jos{\'e}, USA}, keywords = {data-hiding, watermarking}, author = {F{\'e}lix Balado and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {Ping W. Wong and Edward J. Delp} } @article {uvigo:reinit01, title = {Efficient Reinitialization of the Prewhitened Constant Modulus Algorithm}, journal = {IEEE Communications Letters}, volume = {5}, number = {12}, year = {2001}, month = {December}, pages = {488{\textendash}490}, keywords = {constant modulus, Digital Communications, equalization}, author = {R. L{\'o}pez-Valcarce and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {uvigo:cancellation, title = {Equalization and interference cancellation in linear multiuser systems based on second-order statistics}, journal = {IEEE Transactions on Signal Processing}, volume = {49}, number = {9}, year = {2001}, month = {September}, pages = {2042{\textendash}2049}, keywords = {Digital Communications, equalization, second-order statistics}, author = {R. L{\'o}pez-Valcarce and Zhi Ding and Soura Dasgupta} } @conference {Prelcic01b, title = {Orthogonal Extensions of AR Processes without Artificial Discontinuities for Size-Limites Filter Banks}, booktitle = {IEEE Workshop on Statistical Signal Processing (SSP)}, year = {2001}, month = {August}, address = {Singapur}, author = {M. Elena Dom{\'\i}nguez-Jim{\'e}nez and Nuria Gonz{\'a}lez-Prelcic} } @conference {uvigo:coloredcnf, title = {Second order statistics based blind channel equalization with correlated sources}, booktitle = {IEEE International Symposium on Circuits and Systems (ISCAS)}, volume = {4}, year = {2001}, pages = {366{\textendash}369}, address = {Sydney, Australia}, keywords = {correlated sources, Digital Communications, equalization, second-order statistics}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} } @article {uvigo:someproperties, title = {Some properties of the matrix exponential}, journal = {IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing}, volume = {48}, number = {2}, year = {2001}, month = {February}, pages = {213{\textendash}215}, keywords = {exponential matrix, linear algebra}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} } @article {Mosquera01a, title = {On the strengthened robust SPR problem for discrete-time systems}, journal = {Automatica}, volume = {37}, year = {2001}, month = {apr}, pages = {625-628}, keywords = {robust, SPR, strengthened}, author = {C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {Mosquera_Scalise01, title = {Time-transfer performance in burst-mode communication systems}, booktitle = {International Workshop on Digital Signal Processing Techniques for Space Communications (DSP)}, year = {2001}, keywords = {burst, PLL, synchronization}, author = {C. Mosquera and Sandro Scalise and G. Taricco and D. Giunta} } @article {Mosquera01d, title = {Time-transfer performance in burst-mode communication systems}, journal = {IEEE Journal on Selected Areas in Communications}, volume = {19}, year = {2001}, month = {dec}, pages = {2310-2319}, keywords = {burst, PLL, synchronization}, author = {C. Mosquera and Sandro Scalise and G. Taricco and G. Garofalo and D. Giunta} } @conference {uvigo:turbocoding, title = {Turbo Coding for Sample-Level Watermarking in the DCT Domain}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2001}, month = {October}, pages = {1003{\textendash}1006}, address = {Thessaloniki, Greece}, keywords = {data-hiding, watermarking}, author = {F{\'e}lix Balado and Fernando P{\'e}rez-Gonz{\'a}lez and Sandro Scalise} } @article {uvigo:equalization-wavelets, title = {Wavelet-packet-based subband adaptive equalization}, journal = {Signal Processing}, volume = {81}, number = {8}, year = {2001}, month = {August}, pages = {1641-1662}, author = {Nuria Gonz{\'a}lez-Prelcic and Fernando P{\'e}rez-Gonz{\'a}lez and M. Elena Dom{\'\i}nguez-Jim{\'e}nez} } @conference {icc00, title = {Analytical Bounds on the Error Performance of the DVB-T System in Time-Invariant Channels}, booktitle = {IEEE International Conference on Communications (ICC)}, year = {2000}, month = {June}, address = {New Orleans, LA, USA}, keywords = {Digital Communications, Digital Television, Rayleigh, Rice, Terrestrial}, author = {Jos{\'e} M. Lago and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {arbox_journal, title = {ArboX, a Contribution to Digital Library}, journal = {Computer Applications in Engineering Education}, volume = {8}, number = {3{\textendash}4}, year = {2000}, month = {Oct{\textendash}Dec}, pages = {216{\textendash}220}, author = {O.W. M{\'a}rquez and F{\'e}lix Balado and M. V{\'a}zquez and D. Docampo} } @conference {uvigo:blindadaptive, title = {On blind adaptive algorithms for IIR equalizers}, booktitle = {IEEE Digital Signal Processing Workshop (DSP)}, year = {2000}, address = {Hunt, TX, USA}, keywords = {adaptive IIR filters, Digital Communications, equalization, second-order statistics}, author = {R. L{\'o}pez-Valcarce and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {uvigo:identifiability, title = {Blind channel identifiability/equalizability of single input multiple output nonlinear channels from second order statistics}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, volume = {5}, year = {2000}, pages = {2769{\textendash}2772}, address = {Istanbul, Turkey}, keywords = {Digital Communications, equalization, nonlinear channels, second-order statistics}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} } @mastersthesis {802, title = {Blind equalization of linear and nonlinear digital communication channels from second-order statistics}, volume = {Ph.D.}, year = {2000}, month = {12/2000}, school = {University of Iowa}, type = {Ph.D. thesis}, address = {Iowa City, USA}, keywords = {adaptive signal processing, channel equalization}, author = {R. L{\'o}pez-Valcarce} } @article {Mosquera00, title = {Convergence analysis of the multiple-channel filtered-U recursive LMS algorithm for active noise control}, journal = {Signal Processing}, volume = {80}, year = {2000}, pages = {849-856}, keywords = {ANC, FuRLMS, SPR}, author = {C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {uvigo:dctdomain, title = {DCT-Domain Watermarking Techniques for Still Images: Detector Performance Analysis and a New Structure}, journal = {IEEE Transactions on Image Processing}, volume = {9}, number = {1}, year = {2000}, note = {Special Issue on Image and Video Processing for Digital Libraries}, month = {January}, pages = {55{\textendash}68}, keywords = {data-hiding, watermarking}, author = {Juan R. Hern{\'a}ndez and Mart{\'\i}n Amado and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {Prelcic00a, title = {Design of non-expansionist and orthogonal extension methods for tree-structured filter banks}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2000}, month = {June}, address = {Estambul, Turkey}, author = {M. Elena Dom{\'\i}nguez-Jim{\'e}nez and Nuria Gonz{\'a}lez-Prelcic} } @article {uvigo:eas, title = {Exponential asymptotic stability of time-varying inverse prediction error filters}, journal = {IEEE Transactions on Signal Processing}, volume = {48}, number = {7}, year = {2000}, month = {July}, pages = {1928{\textendash}1936}, keywords = {nonstationary processes, prediction error filters, stability}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta and Roberto Tempo and Minyue Fu} } @article {uvigo:improvingperformance, title = {Improving the Performance of Spatial Watermarking of Images Using Channel Coding}, journal = {Signal Processing}, volume = {80}, number = {7}, year = {2000}, month = {July}, pages = {1261-1279}, keywords = {data-hiding, watermarking}, author = {Juan R. Hern{\'a}ndez and Jos{\'e} M. Rodr{\'\i}guez and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {uvigo:interference, title = {Interference cancellation and blind equalization for linear multi-user systems}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, volume = {1}, year = {2000}, pages = {145{\textendash}148}, address = {Istanbul, Turkey}, keywords = {Digital Communications, equalization, second-order statistics}, author = {Zhi Ding and Soura Dasgupta and R. L{\'o}pez-Valcarce} } @conference {uvigo:misconvergence, title = {Misconvergence and stabilization of adaptive IIR lattice filters}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, volume = {1}, year = {2000}, pages = {65{\textendash}68}, address = {Istanbul, Turkey}, keywords = {adaptive IIR filters, lattice filters, system identification}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and R. L{\'o}pez-Valcarce} } @conference {Prelcic00b, title = {New Orthogonal Extension Methods for Tree-Structured Filter Banks}, booktitle = {European Signal Processing Conference (EUSIPCO)}, year = {2000}, month = {September}, address = {Tampere, Finland}, author = {M. Elena Dom{\'\i}nguez-Jim{\'e}nez and Nuria Gonz{\'a}lez-Prelcic} } @conference {uvigo:role, title = {The role of second-order statistics in blind equalization of nonlinear channels}, booktitle = {IEEE Workshop on Statistical Signal Processing (SSP)}, year = {2000}, pages = {211{\textendash}215}, address = {Pocono Manor, PA, USA}, keywords = {Digital Communications, equalization, nonlinear channels, second-order statistics}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} } @conference {arbox, title = {ArboX, a Contribution to Digital Library}, booktitle = {International Conference on Engineering and Computer Education (ICECE)}, year = {1999}, month = {August}, publisher = {IEEE Education Society}, organization = {IEEE Education Society}, address = {Rio de Janeiro, Brazil}, author = {O.W. M{\'a}rquez and F{\'e}lix Balado and M. V{\'a}zquez and D. Docampo} } @conference {bayona99, title = {BER Performance of the DVB-T System in Time-Invariant Channels}, booktitle = {Baiona Workshop on Emerging Technologies in Communications}, year = {1999}, month = {September}, pages = {230-235}, address = {Baiona-Vigo, Spain}, keywords = {Digital Communications, Digital Television, Rayleigh, Rice, Terrestrial}, author = {Jos{\'e} M. Lago and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {uvigo:polyjnl, title = {Hyperstable adaptive IIR algorithms with polyphase structures: analysis and design}, journal = {IEEE Transactions on Signal Processing}, volume = {47}, number = {7}, year = {1999}, month = {July}, pages = {2043{\textendash}2046}, keywords = {adaptive IIR filters, system identification}, author = {R. L{\'o}pez-Valcarce and C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {uvigo:polycnf, title = {Hyperstable polyphase adaptive IIR filters}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, volume = {4}, year = {1999}, pages = {1841{\textendash}1844}, address = {Phoenix, AZ, USA}, keywords = {adaptive IIR filters, system identification}, author = {C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez and R. L{\'o}pez-Valcarce} } @conference {Mosquera_Perez99, title = {IIR adaptive filters for active noise control}, booktitle = {International Congress on Sound and Vibration}, year = {1999}, address = {Copenhagen, Denmark}, keywords = {ANC, IIR, SPR}, author = {C. Mosquera and J.A. G{\'o}mez and Fernando P{\'e}rez-Gonz{\'a}lez and M. Sobreira} } @article {uvigo:newproof, title = {A new proof for the stability of equation-error models}, journal = {IEEE Signal Processing Letters}, volume = {6}, number = {6}, year = {1999}, month = {June}, pages = {148{\textendash}150}, keywords = {adaptive IIR filters, system identification}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} } @conference {uvigo:noveldetector, title = {Novel Detector Structures for Watermark Extraction in the DCT Domain}, booktitle = {Workshop on Nonlinear Signal and Image Processing}, year = {1999}, month = {June}, publisher = {IEEE-EURASIP}, organization = {IEEE-EURASIP}, address = {Antalya, Turkey}, keywords = {data-hiding, watermarking}, author = {Juan R. Hern{\'a}ndez and Mart{\'\i}n Amado and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {Prelcic99a, title = {Processing Finite Length Signals via Filter Banks without Border Distortions: A Non-Expansionist Solution}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {1999}, month = {March}, address = {Phoenix, USA}, author = {M. Elena Dom{\'\i}nguez-Jim{\'e}nez and Nuria Gonz{\'a}lez-Prelcic} } @article {Mosquera99, title = {The robust SPR problem: design algorithms and new applications}, journal = {Signal Processing}, volume = {76}, year = {1999}, pages = {269-283}, keywords = {robust, SPR}, author = {C. Mosquera and L. Leyra and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {uvigo:remarks, title = {Some remarks on the lattice form of the Steiglitz-McBride iteration}, journal = {IEEE Signal Processing Letters}, volume = {6}, number = {11}, year = {1999}, month = {November}, pages = {290{\textendash}292}, keywords = {adaptive IIR filters, lattice filters, system identification}, author = {R. L{\'o}pez-Valcarce and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {uvigo:rwls, title = {On the stability of the inverse time-varying prediction error filter obtained with the RWLS algorithm}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, volume = {3}, year = {1999}, pages = {1673{\textendash}1676}, address = {Phoenix, AZ, USA}, keywords = {nonstationary processes, prediction error filters, stability}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} } @inbook {700, title = {Stable estimates in equation-error identification: an open problem}, booktitle = {Open Problems in Mathematical Systems and Control Theory}, year = {1999}, publisher = {Springer-Verlag}, organization = {Springer-Verlag}, chapter = {28}, isbn = { 1-85233-044-9}, url = {http://perso.uclouvain.be/vincent.blondel/books/openprobs/}, author = {R. L{\'o}pez-Valcarce and S. Dasgupta} } @article {uvigo:statistical, title = {Statistical Analysis of Watermarking Schemes for Copyright Protection of Images}, journal = {Proc. of the IEEE}, volume = {87}, number = {7}, year = {1999}, note = {Special Issue on Identification and Protection of Multimedia Information}, month = {July}, pages = {1142{\textendash}1166}, keywords = {data-hiding, watermarking}, author = {Juan R. Hern{\'a}ndez and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {uvigo:atutorial, title = {A Tutorial on Digital Watermarking}, booktitle = {IEEE Annual Carnahan Conference on Security Technology}, year = {1999}, month = {October}, address = {Madrid, Spain}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and Juan R. Hern{\'a}ndez} } @conference {fwan, title = {A Two-Stage Codebook Building Method Using Fast WAN}, booktitle = {International Conference on Image Analysis and Processing (ICIAP)}, year = {1999}, month = {September}, pages = {1047{\textendash}1050}, publisher = {IEEE Computer Society}, organization = {IEEE Computer Society}, address = {Venice, Italy}, author = {F{\'e}lix Balado and O.W. M{\'a}rquez} } @conference {Prelcic99b, title = {Wavelet Packet based subband adaptive equalization}, booktitle = {Baiona Workshop on Emerging Technologies in Telecommunications}, year = {1999}, month = {September}, address = {Baiona, Spain}, author = {Nuria Gonz{\'a}lez-Prelcic and Fernando P{\'e}rez-Gonz{\'a}lez and M. Elena Dom{\'\i}nguez-Jim{\'e}nez} } @article {uvigo:autoregressive, title = {An adaptive recursive filter for autoregressive inputs}, journal = {International Journal of Adaptive Control and Signal Processing}, volume = {12}, year = {1998}, month = {September}, pages = {467{\textendash}494}, keywords = {adaptive IIR filters, lattice filters, system identification}, author = {R. L{\'o}pez-Valcarce and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {Mosquera98d, title = {An approach to the robust SPR problem through interpolation and avoidance: connections with the robust stability problem}, booktitle = {American Control Conference}, year = {1998}, keywords = {avoidance, interpolation, robust, SPR}, author = {C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {uvigo:notebias, title = {On the bias of the modified output error algorithm}, journal = {IEEE Transactions on Automatic Control}, volume = {43}, number = {9}, year = {1998}, month = {September}, pages = {1261{\textendash}1262}, keywords = {adaptive IIR filters, system identification}, author = {C. Mosquera and R. L{\'o}pez-Valcarce and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {uvigo:codingandsynch, title = {Coding and Synchronization: A Boost and a Bottleneck for the Development of Image Watermarking}, booktitle = {COST $\#$254 Int. Workshop on Intelligent Communications}, year = {1998}, month = {June}, pages = {77{\textendash}82}, publisher = {SSGRR}, organization = {SSGRR}, address = {L{\textquoteright}Aquila, Italy}, keywords = {data-hiding, watermarking}, author = {Juan R. Hern{\'a}ndez and Fernando P{\'e}rez-Gonz{\'a}lez and Jos{\'e} M. Rodr{\'\i}guez} } @conference {Mosquera98b, title = {Filtered error adaptive IIR algorithms and their application to active noise control}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {1998}, keywords = {adaptive, IIR, SPR}, author = {C. Mosquera and J.A. G{\'o}mez and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {Prelcic98a, title = {A Flexible Structure for Wavelet Packet-based Subband Adaptive Equalization}, booktitle = {IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis}, year = {1998}, month = {October}, pages = {377{\textendash}380}, address = {Pittsburgh, USA}, author = {Nuria Gonz{\'a}lez-Prelcic and Fernando P{\'e}rez-Gonz{\'a}lez and A.B. Mosquera-Gonz{\'a}lez} } @conference {uvigo:theimpact, title = {The Impact of Channel Coding on the Performance of Spatial Watermarking for Copyright Protection}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, volume = {5}, year = {1998}, month = {May}, pages = {2973{\textendash}2976}, address = {Seattle, Washington, USA}, keywords = {data-hiding, watermarking}, author = {Juan R. Hern{\'a}ndez and Fernando P{\'e}rez-Gonz{\'a}lez and Jos{\'e} M. Rodr{\'\i}guez} } @conference {uvigo:improvingdctdomain, title = {Improving DCT-Domain Watermark Extraction Using Generalized Gaussian Models}, booktitle = {COST $\#$254 Int. Workshop on Intelligent Communications and Multimedia Terminals}, year = {1998}, month = {November}, pages = {23{\textendash}26}, address = {Ljubljana, Slovenia}, keywords = {data-hiding, watermarking}, author = {Juan R. Hern{\'a}ndez and Fernando P{\'e}rez-Gonz{\'a}lez and Mart{\'\i}n Amado} } @article {uvigo:performance, title = {Performance Analysis of a 2D-Multipulse Amplitude Modulation Scheme for Data Hiding and Watermarking of Still Images}, journal = {IEEE Journal on Selected Areas in Communications}, volume = {16}, number = {4}, year = {1998}, month = {May}, pages = {510{\textendash}524}, keywords = {data-hiding, watermarking}, author = {Juan R. Hern{\'a}ndez and Fernando P{\'e}rez-Gonz{\'a}lez and Jos{\'e} M. Rodr{\'\i}guez and Gustavo Nieto} } @mastersthesis {Mosquera98, title = {Relaxation of the SPR condition with applications to the convergence of adaptive recursive algorithms}, year = {1998}, school = {University of Vigo, Spain}, type = {phd}, author = {C. Mosquera} } @inbook {Mosquera_Perez98d, title = {The Simultaneous Strict Positive Real Problem: Similarities with the Simultaneous Stability Problem and Applications in Adaptive Recursive Algorithms}, booktitle = {Mathematics in Signal Processing}, year = {1998}, pages = {139-148}, publisher = {Oxford University Press}, organization = {Oxford University Press}, keywords = {robust, SPR}, author = {C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {J.G. McWhirter and I.K. Proudler} } @conference {uvigo:conditions, title = {Stability conditions for the time-varying linear predictor}, booktitle = {IEEE Conference on Decision and Control (CDC)}, year = {1998}, month = {December}, pages = {1840{\textendash}1845}, address = {Tampa, FL, USA}, keywords = {nonstationary processes, prediction error filters, stability}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta and Minyue Fu and Roberto Tempo} } @article {uvigo:allpole, title = {On the stability of equation-error estimates of all-pole systems}, journal = {IEEE Signal Processing Letters}, volume = {5}, number = {10}, year = {1998}, month = {October}, pages = {268{\textendash}270}, keywords = {adaptive IIR filters, system identification}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} } @conference {Mosquera98c, title = {On the strengthened robust SPR problem for discrete-time systems}, booktitle = {American Control Conference}, year = {1998}, author = {C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {Prelcic98b, title = {Testing a Flexible Time-Frequency Mapping for High Frequencies in TARCO (Tonal Adaptive Resolution COdec)}, booktitle = {Audio Engineering Society Convention (AES Convention)}, year = {1998}, note = {Preprint 4676 (P9-6)}, month = {May}, address = {Amsterdam, The Netherlands}, author = {Alejandro Casal and Carlos Serantes and Nuria Gonz{\'a}lez-Prelcic and Antonio S. Pena} } @conference {uvigo:throwing, title = {Throwing More Light on Image Watermarks}, booktitle = {International Workshop on Information Hiding (IH)}, series = {Lecture Notes in Computer Science}, volume = {1525}, year = {1998}, month = {April}, pages = {191{\textendash}207}, publisher = {Springer-Verlag}, organization = {Springer-Verlag}, address = {Portland, Oregon, USA}, keywords = {data-hiding, watermarking}, author = {Juan R. Hern{\'a}ndez and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {MosqueraPerez97b, title = {An Algorithm for Interpolation with Positive Rational Functions on the Imaginary Axis}, journal = {Automatica}, volume = {33}, year = {1997}, pages = {2277-2280}, keywords = {interpolation, SPR}, author = {C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} } @inbook {Mosquera_Perez97a, title = {Analysis and Synthesis Tools for Robust SPRness}, booktitle = {Intelligent methods in signal processing and communications}, year = {1997}, pages = {147-171}, publisher = {Birkhauser}, organization = {Birkhauser}, keywords = {robust, SPR}, author = {C. Mosquera and Juan R. Hern{\'a}ndez and Fernando P{\'e}rez-Gonz{\'a}lez}, editor = {A. Figueiras and D. Docampo and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {uvigo:datahiding, title = {Data Hiding for Copyright Protection of Still Images}, booktitle = {Emerging Techniques for Communication Terminals}, year = {1997}, month = {July}, pages = {285{\textendash}289}, publisher = {ENSEEIHT}, organization = {ENSEEIHT}, address = {Tolouse, France}, keywords = {data-hiding, watermarking}, author = {Juan R. Hern{\'a}ndez and Fernando P{\'e}rez-Gonz{\'a}lez and Jos{\'e} M. Rodr{\'\i}guez} } @conference {Prelcic97b, title = {A Fast Noise-Scaling Algorithm for Uniform Quantization in Audio Coding Schemes}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {1997}, month = {May}, address = {Munich, Germany}, author = {Carlos Serantes and Antonio S. Pena and Nuria Gonz{\'a}lez-Prelcic} } @conference {Prelcic97a, title = {A Flexible Tiling of the Time Axis for Adaptive Wavelet Packet Audio Decompositions}, booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {1997}, month = {May}, address = {Munich, Germany}, author = {Nuria Gonz{\'a}lez-Prelcic and Antonio S. Pena and Carlos Serantes} } @conference {Prelcic97c, title = {New Improvements in ARCO}, booktitle = {Audio Engineering Society Convention (AES Convention)}, year = {1997}, note = {Preprint 4419 (C-6)}, month = {March}, address = {Munich, Germany}, author = {Antonio S. Pena and Nuria Gonz{\'a}lez-Prelcic and Carlos Serantes} } @article {uvigo:newresults, title = {New results and theoretical analysis of the Master-Slave family of recursive identification algorithms}, journal = {Signal Processing}, volume = {58}, number = {1}, year = {1997}, month = {April}, pages = {79-94}, keywords = {adaptive IIR filters, lattice filters, system identification}, author = {R. L{\'o}pez-Valcarce and Fernando P{\'e}rez-Gonz{\'a}lez} } @conference {uvigo:stable, title = {Stable estimates in equation error identification}, booktitle = {IEEE Conference on Decision and Control (CDC)}, volume = {2}, year = {1997}, month = {December}, pages = {1678{\textendash}1679}, address = {San Diego, CA, USA}, keywords = {adaptive IIR filters, system identification}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} } @conference {Prelcic96a, title = {An Adaptive Tree Search Algorithm with Application to Multiresolution-based Perceptive Audio Coding}, booktitle = {IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis}, year = {1996}, month = {June}, pages = {117{\textendash}120}, address = {Paris, France}, author = {Nuria Gonz{\'a}lez-Prelcic and Antonio S. Pena} } @conference {Prelcic96c, title = {ARCO (Adaptive Resolution COdec): A Hybrid Approach to Perceptual Audio Coding}, booktitle = {Audio Engineering Society Convention (AES Convention)}, year = {1996}, note = {Preprint 4178}, month = {May}, address = {Copenhagen, Denmark}, author = {Antonio S. Pena and Carlos Serantes and Nuria Gonz{\'a}lez-Prelcic} } @conference {Perez_Mosquera96, title = {Characterization and Algebraic Solution to the Extreme-Point Robust SPR Problem}, booktitle = {IFAC World Congress}, year = {1996}, pages = {391-396}, address = {San Francisco, CA, USA}, keywords = {robust, SPR}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and C. Mosquera} } @article {uvigo:document, title = {A comparison of system architectures for intelligent document understanding}, journal = {Signal Processing: Image Communication}, volume = {9}, number = {1}, year = {1996}, month = {November}, pages = {1-19}, author = {G. S. D. Farrow and C. S. Xydeas and J.P. Oakley and A. Khorabi and Nuria Gonz{\'a}lez-Prelcic} } @conference {Prelcic96b, title = {Considerations on the Performance of Filter Design Methods for Wavelet Packet Audio Decompositions}, booktitle = {Audio Engineering Society Convention (AES Convention)}, year = {1996}, note = {Preprint 4235}, month = {May}, address = {Copenhagen, Denmark}, author = {Nuria Gonz{\'a}lez-Prelcic and S. Gonz{\'a}lez-S{\'a}nchez and Antonio S. Pena} } @conference {uviwave2, title = {An Interactive Software for a Hypertext Course in Wavelets}, booktitle = {IEEE Digital Signal Processing Workshop (DSP)}, year = {1996}, month = {September}, address = {Loen, Norway}, author = {O.W. M{\'a}rquez and Nuria Gonz{\'a}lez-Prelcic} } @conference {uvigo:masterslave, title = {The Master-Slave family of system identification algorithms: theoretical results and new structures}, booktitle = {IFAC World Congress}, volume = {J}, year = {1996}, month = {June}, pages = {185{\textendash}190}, publisher = {IFAC}, organization = {IFAC}, address = {San Francisco, CA, USA}, keywords = {adaptive IIR filters, lattice filters, system identification}, author = {R. L{\'o}pez-Valcarce and Fernando P{\'e}rez-Gonz{\'a}lez} } @article {uvigo:speech-wavelets, title = {A multipulse-like wavelet-based speech coder}, journal = {Applied Signal Processing}, volume = {3}, year = {1996}, pages = {78-87}, author = {Nuria Gonz{\'a}lez-Prelcic and D. Docampo} } @conference {uviwave1, title = {Uvi_Wave, the Ultimate Toolbox for Wavelet Transforms and Filter Banks}, booktitle = {Baiona Workshop on Intelligent Methods in Signal Processing and Communication}, year = {1996}, month = {June}, address = {Baiona, Spain}, author = {Nuria Gonz{\'a}lez-Prelcic and O.W. M{\'a}rquez} } @conference {Perez_Mosquera95, title = {Algebraic LTI Filter Synthesis for Simultaneously Making a Convex Combination of Discrete-Time Plants SPR}, booktitle = {IEEE Conference on Decision and Control (CDC)}, year = {1995}, pages = {780-781}, address = {New Orleans, LA}, keywords = {robust, SPR}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and C. Mosquera} } @conference {Prelcic95, title = {A Multipulse-like Wavelet-based Speech Coder}, booktitle = {UK Symposium on Applications of Time-Frequency and Time-Scale Methods (TFTS)}, year = {1995}, month = {August}, address = {Warwick, UK}, author = {Nuria Gonz{\'a}lez-Prelcic and D. Docampo} } @conference {Prelcic94, title = {Application of singularity detection with wavelets for pitch estimation of speech signals}, booktitle = {European Signal Processing Conference (EUSIPCO)}, year = {1994}, month = {September}, address = {Edimburgh, UK}, author = {Nuria Gonz{\'a}lez-Prelcic and D. Docampo} }