Configuring precoders and combiners is a major

challenge to deploy practical multiple-input multiple-output

(MIMO) millimeter wave (mmWave) communication systems

with large antenna arrays. Most prior work addresses the problem

focusing on a total transmit power constraint. In practical

transmitters, however, power amplifiers must operate within their

linear range, so that a power constraint applies to each one

of the input signals to these devices. Therefore, precoder and

combiner designs should incorporate per-antenna or per-radio

frequency (RF) chain transmit power constraints. We focus on

such problem for frequency-selective channels with multicarrier

modulation, and assuming hybrid analog/digital architectures

based on fully connected analog blocks implemented with finite resolution

phase shifters. We first derive an all-digital solution

which aims to maximize spectral efficiency. Then, we develop

hybrid precoders and combiners by approximately matching

the corresponding all-digital matrices while still enforcing the

power constraints. Numerical results show that the proposed

all-digital design performs close to the upper bound given

by the standard waterfilling-based solution with a total power

constraint. Additionally, the hybrid designs exhibit a moderate

loss even when low-resolution phase shifters are considered.

ER -
TY - CONF
T1 - Homomorphic SVM Inference for Fraud Detection
T2 - VI Jornadas Nacionales de Investigación en Ciberseguridad (JNIC)
Y1 - 2021
A1 - Adrián Vázquez-Saavedra
A1 - Gonzalo Jiménez-Balsa
A1 - Jaime Loureiro-Acuña
A1 - Manuel Fernández-Veiga
A1 - Alberto Pedrouzo-Ulloa
JF - VI Jornadas Nacionales de Investigación en Ciberseguridad (JNIC)
PB - Ediciones de la Universidad de Castilla-La Mancha
U1 - JNIC 2021 Best Short Paper Award

ER - TY - JOUR T1 - A Hybrid Beamforming Design for Massive MIMO LEO Satellite Communications JF - Frontiers in Space Technologies Y1 - 2021 A1 - Joan Palacios A1 - Nuria González-Prelcic A1 - Carlos Mosquera A1 - Takayuki Shimizu A1 - Chang-Heng Wang VL - 2 UR - https://www.frontiersin.org/articles/10.3389/frspt.2021.696464/full ER - TY - THES T1 - Homomorphic Lattice Cryptosystems for Secure Signal Processing Y1 - 2019 A1 - Alberto Pedrouzo-Ulloa PB - University of Vigo CY - Vigo ER - TY - JOUR T1 - Hybrid MIMO Architectures for Millimeter Wave Communications: Phase Shifters or Switches? JF - IEEE Access Y1 - 2016 A1 - Mendez-Rial, Roi A1 - Rusu, Cristian A1 - Nuria González-Prelcic A1 - Alkhateeb, A. A1 - Heath Jr, Robert W. VL - 4 UR - http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7370753 ER - TY - CONF T1 - Hybrid precoders and combiners for mmWave MIMO systems with per-antenna power constraints T2 - IEEE Global Telecommunications Conf. (GLOBECOM) Y1 - 2016 A1 - R. López-Valcarce A1 - Nuria González-Prelcic A1 - Cristian Rusu A1 - R. W. Heath, Jr KW - compass KW - mmWave AB -This paper considers the design of hybrid precoders

and combiners for mmWave MIMO systems with per-antenna

power constraints and the additional limitations introduced by

the phase-shifting network in the analog processing stage. Previous

hybrid designs were obtained using a total power constraint,

but in practical implementations per-antenna constraints are

more realistic, specially at mmWave, given the large number of

power amplifiers used in the transmit array. Assuming perfect

channel knowledge, we obtain first an approximation to the alldigital

solution for the precoder and the combiner given the

per-antenna constraints. Then, we develop a new method for the

design of the hybrid precoder and combiner which attempts to

match such all-digital approximation. Simulation results show

the effectiveness of the proposed approach, which performs close

to the all-digital solution.

JF - IEEE Global Telecommunications Conf. (GLOBECOM)
ER -
TY - CONF
T1 - How to Implement Doubly-Stochastic Matrices for Consensus-Based Distributed Algorithms
T2 - IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM)
Y1 - 2014
A1 - S. Valcárcel-Macua
A1 - C. Moreno-León
A1 - J. S. Romero
A1 - Silvana Silva Pereira
A1 - Javier Zazo
A1 - Alba Pagès-Zamora
A1 - R. López-Valcarce
A1 - S. Zazo
KW - compass
KW - dynacs
KW - wsn
AB - Doubly-stochastic matrices are usually required by

consensus-based distributed algorithms. We propose a simple

and efficient protocol and present some guidelines for implementing

doubly-stochastic combination matrices even in noisy,

asynchronous and changing topology scenarios. The proposed

ideas are validated with the deployment of a wireless sensor

network, in which nodes run a distributed algorithm for robust

estimation in the presence of nodes with faulty sensors.

JF - IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM)
CY - A Coruña, Spain
ER -
TY - CONF
T1 - Hybrid Space-Ground Processing for High-Capacity Multi-beam Satellite Systems
T2 - IEEE GLOBECOM
Y1 - 2011
A1 - Arnau, Jesus
A1 - Michael Bergmann
A1 - Enzo Alberto Candreva
A1 - Giovanni Emanuele Corazza
A1 - Riccardo {De Gaudenzi}
A1 - Bertrand Devillers
A1 - Wilfried Gappmair
A1 - Francesco Lombardo
A1 - C. Mosquera
A1 - Ana Pérez-Neira
A1 - Ilaria Thibault
A1 - Alessandro Vanelli-Coralli
JF - IEEE GLOBECOM
CY - Houston, Texas, USA
N1 - Selected Areas in Communications Symposium - Satellite & Space Communications Track (GC'11 - SAC - SSC)
ER -
TY - JOUR
T1 - High-rate data-hiding robust to linear filtering for colored hosts
JF - EURASIP Journal on Information Security
Y1 - 2009
A1 - Scagliola, Michele
A1 - Fernando Pérez-González
A1 - Guccione, Pietro
KW - data-hiding
KW - rational dither modulation
KW - watermarking
ER -
TY - CONF
T1 - High-rate quantization data hiding robust to arbitrary linear filtering attacks
T2 - Security, Steganography, and Watermarking of Multimedia Contents
Y1 - 2006
A1 - Fernando Pérez-González
A1 - C. Mosquera
A1 - Marcos Álvarez-Díaz
A1 - Reginald Lagendijk
ED - Edward J. Delp
ED - Ping W. Wong
KW - data-hiding
KW - watermarking
JF - Security, Steganography, and Watermarking of Multimedia Contents
T3 - Proc. of SPIE
PB - SPIE
CY - San Jose, California, USA
VL - 5306
ER -
TY - CONF
T1 - Hexagonal Quantizers are not Optimal for 2-D Data Hiding
T2 - Security and Watermarking of Multimedia Contents
Y1 - 2003
A1 - Félix Balado
A1 - Fernando Pérez-González
ED - Ping W. Wong
ED - Edward J. Delp
KW - data-hiding
KW - watermarking
JF - Security and Watermarking of Multimedia Contents
T3 - Proc. of SPIE
CY - Santa Clara, USA
VL - 5020
ER -
TY - JOUR
T1 - Hyperstable adaptive IIR algorithms with polyphase structures: analysis and design
JF - IEEE Transactions on Signal Processing
Y1 - 1999
A1 - R. López-Valcarce
A1 - C. Mosquera
A1 - Fernando Pérez-González
KW - adaptive IIR filters
KW - system identification
VL - 47
ER -
TY - CONF
T1 - Hyperstable polyphase adaptive IIR filters
T2 - IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
Y1 - 1999
A1 - C. Mosquera
A1 - Fernando Pérez-González
A1 - R. López-Valcarce
KW - adaptive IIR filters
KW - system identification
JF - IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
CY - Phoenix, AZ, USA
VL - 4
ER -