@conference {1072, title = {Exploiting PRNU and Linear Patterns in Forensic Camera Attribution under Complex Lens Distortion Correction}, booktitle = {ICASSP 2023 - 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)}, year = {2023}, pages = {1-5}, keywords = {Acoustic distortion, Camera Attribution, Camera Source Identification, cameras, forensics, GPU, Graphics processing units, interpolation, PRNU, Radial Distortion Correction, Reliability, Software}, doi = {10.1109/ICASSP49357.2023.10096605}, url = {https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=10096605}, author = {Montibeller, Andrea and Fernando P{\'e}rez-Gonz{\'a}lez} } @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 {1008, title = {Editorial: Signal Processing for Beyond 5G Non-Terrestrial Networks}, journal = {Frontiers in Space Technologies}, volume = {2}, year = {2021}, issn = {2673-5075}, doi = {10.3389/frspt.2021.780171}, url = {https://www.frontiersin.org/articles/10.3389/frspt.2021.780171/full}, author = {Carlos Mosquera and Pantelis-Daniel Arapoglou} } @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 = {
The energy-aware design of fully analog precoders and combiners is investigated in this paper. To that aim, we consider a millimeter-wave short-packet communication scenario where power consumption and hardware complexity constitute relevant factors. User terminals employ a single channel encoder and, at hardware level, they implement analog architectures that combine phase shifters and switches. Additionally, transmitting terminals also leverage a power control system. An energy efficiency figure of merit is considered, and its optimization subject to finite packet-length constraints is tackled cyclically over disconnected feasible sets. Numerical results are reported
firstly, to illustrate the advantages of the proposed short-packet fully analog design, secondly, to compare its performance to that of on-off beamforming, and finally, to discuss the optimality of the proposed optimization algorithm.
}, keywords = {mmWave, rodin}, author = {Jordi Borr{\`a}s and Francesc Molina and R. L{\'o}pez-Valcarce and Josep Sala} } @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 {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 {860, title = {Estimating millimeter wave channels using out-of-band measurements}, booktitle = {Information Theory and Applications Workshop (ITA}, year = {2016}, month = {January, 2016}, keywords = {compass, mmWave}, author = {Anum Ali and Nuria Gonz{\'a}lez-Prelcic and R.W. Heath Jr.} } @mastersthesis {798, title = {Estimation, Detection, and Learning for Dynamic Spectrum Access}, volume = {Ph.D.}, year = {2015}, month = {05/2015}, school = {University of Vigo}, type = {Ph.D. Thesis}, address = {Vigo, Spain}, keywords = {cognitive radio, compass, dynacs, wsn}, author = {Daniel Romero} } @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 {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 {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 {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} } @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 {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 {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} } @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} } @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} } @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} }