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Browsing by Author "González Salvador, Alberto"

Now showing items 1-20 of 54

A GPU implementation of an iterative receiver for energy saving MIMO ID-BICM systems

Ramiro Sánchez, Carla; Simarro Haro, Mª de los Angeles; Martínez Zaldívar, Francisco José; Vidal Maciá, Antonio Manuel; Gonzalez, Alberto (Springer Verlag, 2014-11)

Iterative detection and decoding in communication systems with multiple transmitter and receiver antennas suffer from a significant increase in the computational cost and energy consumption. Nowadays, application of specific ...
A limited feedback scheme based on spatially correlated channels for coordinated multipoint systems

Domene Oltra, Fernando; Piñero, Gema; Botella Mascarell, Carmen; Gonzalez, Alberto (SpringerOpen, 2012)

High spectral efficiency can be achieved in the downlink of multi-antenna coordinated multi-point systems provided that the multiuser interference is appropriately managed at the transmitter side. For this sake, downlink ...
Active noise control over adaptive distributed networks

Ferrer Contreras, Miguel; Diego Antón, María de; Piñero Sipán, María Gemma; González Salvador, Alberto (Elsevier, 2015-02)

This paper presents the implementation of Active Noise Control (ANC) systems over a network of distributed acoustic nodes. For this purpose we define a general acoustic node consisting of one or several microphones and one ...
Adaptive signal processing for multichannel sound using high performance computing

Lorente Giner, Jorge (2015-12-02)

[EN] The field of audio signal processing has undergone a major development in recent years. Both the consumer and professional marketplaces continue to show growth in audio applications such as immersive audio schemes ...
Adaptive step ODE algorithms for the 3D simulation of electric heart activity with graphics processing units

García Mollá, Víctor Manuel; Liberos Mascarell, Alejandro; Vidal Maciá, Antonio Manuel; Guillem Sánchez, María Salud; Millet Roig, José; González Salvador, Alberto; Martínez Zaldívar, Francisco José; Climent, Andreu M. (Elsevier, 2014-02)

In this paper we studied the implementation and performance of adaptive step methods for large systems of ordinary differential equations systems in graphics processing units, focusing on the simulation of three-dimensional ...
An affine projection algorithm with variable step-size and projection order

Gonzalez, Alberto; Ferrer Contreras, Miguel; Diego Antón, María de; Piñero Sipán, María Gemma (Elsevier, 2012-07)

It is known that the performance of adaptive algorithms is constrained by their computational cost. Thus, affine projection adaptive algorithms achieve higher convergence speed when the projection order increases, which ...
An efficient fixed-complexity sphere decoder with quantized soft outputs

Roger Varea, Sandra; Gonzalez, Alberto; Almenar Terré, Vicenç; Matz, Gerald (Institute of Electrical and Electronics Engineers (IEEE), 2012-11)

In practical multiple-input multiple-output bit-interleaved-coded-modulation (MIMO-BICM) systems, demodulators have to deliver finite word-length (quantized) log-likelihood-ratios (LLRs). In this letter, we propose an ...
An efficient GPU implementation of fixed-complexity sphere decoders for MIMO wireless systems

Roger Varea, Sandra; Ramiro Sánchez, Carla; González Salvador, Alberto; Almenar Terré, Vicenç; Vidal Maciá, Antonio Manuel (IOS Press, 2012)

The use of many-core processors such as general purpose Graphic Processing Units (GPUs) has recently become attractive for the efficient implementation of signal processing algorithms for communication systems. This is due ...
Assessment of historic structures based on GPR, ultrasound, and impact-echo data fusion

Safont Armero, Gonzalo; Salazar Afanador, Addisson; Vergara Domínguez, Luís; Vidal Maciá, Antonio Manuel; Gonzalez, Alberto (Trans Tech Publications, 2013)

[EN] This paper presents a method for assessment of historic structures based on the fusion of data from ground-penetrating radar (GPR), ultrasound, and impact-echo testing. The method consists of the following ...
Blockwise Frequency Domain Active Noise Controller Over Distributed Networks

Antoñanzas-Manuel, Christian; Ferrer Contreras, Miguel; Diego Antón, María de; Gonzalez, Alberto (MDPI, 2016-05)

This work presents a practical active noise control system composed of distributed and collaborative acoustic nodes. To this end, experimental tests have been carried out in a listening room with acoustic nodes equipped ...
Channel Quantization Based on the Statistical Characterization of Spatially Correlated Fading

Domene Oltra, Fernando; Piñero Sipán, María Gemma; Diego Antón, María de; Gonzalez, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2015-09)

Multiuser multiple-input-multiple-output (MUMIMO) techniques, such as scheduling and precoding, have shown to improve the spectral efficiency of wireless communication systems. However, these techniques require an accurate ...
Control Effort Strategies for Acoustically Coupled Distributed Acoustic Nodes

Antoñanzas-Manuel, Christian; Ferrer Contreras, Miguel; Diego Antón, María de; Gonzalez, Alberto (John Wiley & Sons, 05-12-2017)

[EN] This paper considers the effect of effort constraints on the behavior of an active noise control (ANC) system over a distributed network composed of acoustic nodes. A distributed implementation can be desirable in ...
Convex combination filtered-X algorithms for active noise control systems

Ferrer Contreras, Miguel; Gonzalez, Alberto; Diego Antón, María de; Piñero Sipán, María Gemma (Institute of Electrical and Electronics Engineers (IEEE), 2013-01)

Adaptive filtering schemes exhibit a compromise between convergence speed and steady-state mean square error. Trying to overcome this trade-off, convex combination of adaptive filters have been recently developed for system ...
Convex combination of nonlinear adaptive filters for active noise control

George, Nithin V.; Gonzalez, Alberto (Elsevier, 2014-02)

This paper proposes a nonlinear active noise control (ANC) system based on convex combination of a functional link artificial neural network (FLANN) and a Volterra filter. Simulation study reveals enhanced noise cancelation ...
Decodificacion óptima de secuencias - Algoritmo de Viterbi

Piñero Sipán, María Gemma; González Salvador, Alberto (2008-04-14)

Explicación del Algoritmo de Viterbi para la detección óptima de secuencias codificadas
Desarrollo y evaluación de ténicas de auido espacial

Mocholí Belenguer, Ferran (2015-02-04)

El objetivo de este trabajo será la creación de una herramienta gráfica con la cual se recree un sistema espacial de audio mediante la escucha con auriculares o altavoces. Esta inclusión de información espacial permitirá ...
Design and Implementation of Efficient Algorithms for Wireless MIMO Communication Systems

Roger Varea, Sandra (2012-07-16)

En la última década, uno de los avances tecnológicos más importantes que han hecho culminar la nueva generación de banda ancha inalámbrica es la comunicación mediante sistemas de múltiples entradas y múltiples salidas ...
Distributed Affine Projection Algorithm Over Acoustically Coupled Sensor Networks

Ferrer Contreras, Miguel; Gonzalez, Alberto; Diego Antón, María de; Piñero, Gemma (Institute of Electrical and Electronics Engineers, 2017)

[EN] In this paper, we present a distributed affine projection (AP) algorithm for an acoustic sensor network where the nodes are acoustically coupled. Every acoustic node is composed of a microphone, a processor, and an ...
Distributed and Collaborative Processing of Audio Signals: Algorithms, Tools and Applications

Antoñanzas Manuel, Christian (2020-09-30)

[ES] Esta tesis se enmarca en el campo de las Tecnologías de la Información y las Comunicaciones (TIC), especialmente en el área del procesado digital de la señal. En la actualidad, y debido al auge del Internet de los ...
Effi cient algorithms for iterative detection and decoding in Multiple-Input and Multiple-Output Communication Systems.

Simarro Haro, Mª de los Angeles (2017-09-01)

This thesis fits into the Multiple-Input Multiple-Output (MIMO) communication systems. Nowadays, these schemes are the most promising technology in the field of wireless communications. The use of this technology allows ...