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Now showing items 21-40 of 173

Speaker recognition improvement using blind inversion of distortions

Faundez-Zanuy, Marcos; Solé-Casals, Jordi (2004)

In this paper we propose the inversion of nonlinear distortions in order to improve the recognition rates of a speaker recognizer system. We study the effect of saturations on the test signals, trying to take into ...
Implementation of a Channel Equalizer for OFDM Wireless LANs

Serra i Serra, Moisès; Martí i Puig, Pere; Carrabina, Jaume (IEEE, 2004)

This paper presents an implementation of a channel equalizer for a wireless OFDM according to the IEEE 802.11a and Hiperlan/2 standard. In order to implement the equalizer, algorithms of low computational complexity have ...
IFFTIFFT core architecture with an identical stage structure for wireless LAN communications

Serra i Serra, Moisès; Martí i Puig, Pere; Carrabina, Jaume (IEEE, 2004)

Abstrac(- This paper shows the design of the IFFT module corresponding to the baseband processing of an OFDM transmitter according to the IEEE802.11a-g and Hiperlan/2 standard. This module will be included in a future OFDM ...
Post-Nonlinear Mixtures and Beyond

Solé-Casals, Jordi; Jutten, Christian (TSI Press, 2004)

Although sources in general nonlinear mixturm arc not separable iising only statistical independence, a special and realistic case of nonlinear mixtnres, the post nonlinear (PNL) mixture is separable choosing a suited ...
Blind source separation for solid-state chemical Sensors Arrays

Bermejo, Sergio; Solé-Casals, Jordi (IEEE, 2004)

Electronic noses and tongues are two recent examples in chemical sensing that employ statistical array techniques in order to overcome the intrinsic limitations of current solid-state chemical sensors like ion-selective ...
A Robust Multiple Feature Approach To Endpoint Detection In Car Environment Based On Advanced Classifiers

Comas, C.; Monte-Moreno, Enric; Solé-Casals, Jordi (Springer, 2005)

In this paper we propose an endpoint detection system based on the use of several features extracted from each speech frame, followed by a robust classifier (i.e Adaboost and Bagging of decision trees, and a multilayer ...
Blind channel deconvolution of real world signals using source separation techniques

Solé-Casals, Jordi; Monte-Moreno, Enric (Springer, 2005)

In this paper we present a method for blind deconvolution of linear channels based on source separation techniques, for real word signals. This technique applied to blind deconvolution problems is based in exploiting ...
Video observations of crescentic sandbar formation and modelling implications

Coco, G.; Ruessink, B.G.; Van Enckevort, I.M.J.; Caballeria, Miquel; Falqués, Albert; Holman, R.A.; Plant, N.G.; Turner, I.L. (World Scientific, 2005)

The development of surf zonc crescentic sandbars has beeo analyzed using video observations al lhrce sites: Duck (USA), Gold Coast (Australia). and NoordwiJk (The Netherlands). Video observations indicate the developmenl ...
Rapid prototyping with the visual data environment of an OFDM WLAN system

Serra i Serra, Moisès; Martí i Puig, Pere; Carrabina, Jordi (SPIE, 2005)

In this paper a rapid prototyping design flow is presented and applied to a prototype of the base-band physical layer of a Hiperlan/2 WLAN transceiver. This physical layer is a high performance multi-rate system that contains ...
El agua: un espacio de sensaciones y emociones

Pla, Gil (Instituto de Ciencias del Deporte (Múrcia), 2005)

El presente trabajo pretende ahondar en la comprensión del medio acuático como medio de impresión sensorial y como medio de alta significación para el desarrollo del bebé. A partir de este objetivo fundamental, se reflexiona ...
El agua: un medio de intervención para el psicomotricista

Pla, Gil (2005)

A partir de algunas de las ya clásicas definiciones de la psicomotricidad, la comunicación constata que lo que define la intervención psicomotriz no es su espacio físico de desarrollo sino su acción, su enfoque y su ...
Stochastic heuristic dynamic assignment based on AIMSUN microscopic traffic simulator

Barceló, Jaume; Casas Vilaró, Jordi (US National Research Council, 2006)

The deployment of intelligent transportation systems must be assisted by suitable tools to conduct the feasibility studies required to test the designs and evaluate the expected impacts. Microscopic traffic simulation has ...
A Canonical Genetic Algorithm for Blind Inversion of Linear Channels

Rojas, Fernando; Solé-Casals, Jordi; Monte-Moreno, Enric; Puntonet, Carlos G.; Prieto, Alberto (Springer, 2006)

It is well known the relationship between source separation and blind deconvolution: If a filtered version of an unknown i.i.d. signal is observed, temporal independence between samples can be used to retrieve the original ...
A family of fast walsh hadamard algorithms with identical sparse matrix factorization

Martí i Puig, Pere (IEEE, 2006)

In this letter, we present a family of fast Walsh Hadamard transform algorithms that have an identical and iterative stage factorization. We show the transform factorization in terms of identical sparse matrices that ...
GSD. Un caso de estudio con aprendizaje combinado

Contreras, Ruth S. (Ruth Sofhía); Alpiste Penalba, Francesc; Eguía, José Luis; Torres Kompen, Ricardo (2006)

El Graduado Superior en Diseño (GSD) de la Universitat Politècnica de Catalunya, está basado en un modelo de aprendizaje combinado, en el cual las nuevas tecnologías representan una oportunidad para la enseñanza y ofrecen ...
La Interpretación del paisaje como instrumento de comunicación con la sociedad. Aportaciones de la semiótica y de los procesos de participación pública

San Eugenio Vela, Jordi de (2006)

La recién creada Ley del Paisaje de Catalunya responde, en primer lugar, a una nueva toma en consideración del paisaje como activo físico y cultural a preservar. El Observatorio del Paisaje de Catalunya es el ente encargado ...
El desarrollo psicomotriz en el medio acuático. Aportaciones desde la fenomenología

Pla, Gil; Ramírez, Eduard (Ramírez Banzo); Boluda Viñuales, Gemma (2007)

Esta comunicación presenta la síntesis de una más amplia investigación que tiene como objetivo comprender el potencial pedagógico del espacio acuático sobre los niños y las niñas en edades tempranas. Concretamente centra ...
EEG Windowed statitical wavelet deviation for estimation of muscular artifacts

Vialatte, François B.; Solé-Casals, Jordi; Cichocki, Andrej (IEEE, 2007)

Electroencephalographic (EEG) recordings are, most of the times, corrupted by spurious artifacts, which should be rejected or cleaned by the practitioner. As human scalp EEG screening is error-prone, automatic artifact ...
An Evolutionary Approach for Blind Inversion of Wiener Systems

Rojas, Fernando; Solé-Casals, Jordi; Puntonet, Carlos G. (2007)

The problem of blind inversion of Wiener systems can be considered as a special case of blind separation of post-nonlinear instantaneous mixtures. In this paper, we present an approach for nonlinear deconvolution of one ...
Estimación de funciones no lineales en mezclas post-no lineales

Solé-Casals, Jordi; Jutten, Christian (2007)

This paper proposes a new method for blindly inverting a nonlinear mapping which transforms a sum of random variables. This is the case of post-nonlinear (PNL) source separation mixtures. The importance of the method is ...

Now showing items 21-40 of 173

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