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Listar Documents de Congressos por autor "Martí i Puig, Pere"

Mostrando ítems 1-18 de 18

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 ...
A fast OFDM-CDMA user demultiplexing architecture

Martí i Puig, Pere; Sala Álvarez, J. (IEEE, 2000)

A fast algorithm based on a butterfly structure is presented that demultiplexes the symbols of a particular type of MC-MA (Multi-Carrier Multiple-Access) modulation previously proposed for indoor radio communications ...
A recursive approach to Multiscalar Data Interpolation of sparsely sampled sea surface measurements at different spatial resolutions

Reig Bolaño, Ramon; García Ladona, Emili; Parisi Baradad, Vicenç; Martí i Puig, Pere (IEEE, 2008)

Abstract- In many oceanographic studies there is a need to reconstruct a signal from a set of sparse measurements. We propose an algorithm to iteratively approximate the intermediate values between irregularly sampled ...
Applications of Cumulants in Speech Processing

Zaiats, Vladimir; Solé-Casals, Jordi; Martí i Puig, Pere; Reig Bolaño, Ramon (Springer, 2010)

This paper analyzes applications of cumulant analysis in speech processing. The main focus is made on an integral representation for cUl1luJants using integrals involving cyclic products of kernels. These integrals serve ...
Coarse frequency estimation in ofdm packet oriented systems

Martí i Puig, Pere; Sala Álvarez, J. (Institute of Electrical and Electronic Engineers, IEEE, 2001)

In this paper we derive a fast blind coarse frequency offset estimator for OFDM systems in selective frequency channels. The estimator takes advantage of the strong structure of the OFDM signal. In packet oriented ...
Coding of Biosignals Using the Discrete Wavelet Decomposition

Reig Bolaño, Ramon; Martí i Puig, Pere; Solé-Casals, Jordi; Zaiats, Vladimir; Parisi Baradad, Vicenç (Springer, 2010)

Abstract. Wavelet derived codification techniques are widespread used in image codifiers. The wavelet based compression methods are adequate for representing transients. In this paper we explore the use of the discrete ...
Fine frequency offset estimation for OFDM signals in frequency selective channels

Martí i Puig, Pere; Sala Álvarez, J. (2015)
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 ...
Image Processing to Detect and Classify Situations and States of Elderly People

Reig Bolaño, Ramon; Martí i Puig, Pere; Bajo, Javier; Rodríguez, Sara; De Paz, Juan F.; Rubio, Manuel P. (Springer, 2011)

Abstract. Monitoring and tracking of elderly people using vision algorithms is an strategy gaining relevance to detect anomalous and potentially dangerous situations and react immediately. In general vision algorithms ...
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 ...
Market Stock Decisions Based on Morphological Filtering

Martí i Puig, Pere; Reig Bolaño, Ramon; Bajo, Javier; Rodríguez, Sara (Springer, 2010)

In this paper we use a nonlinear processing technique based on mathematical morphology to develop a simple day trading system that automatically decides the timing to commute the marked strategy in terms of sort/long ...
Mathematical Morphology Preprocessing to Mitigate AWGN Effects: Improving Pitch Tracking Performance in Hard Noise Conditions

Martí i Puig, Pere; Solé-Casals, Jordi; Reig Bolaño, Ramon; Zaiats, Vladimir (Springer, 2010)

Abstract. In this paper we show how a nonlinear preprocessing of speech signal -with high noise- based on morphological filters improves the performance of robust algorithms for pitch tracking (RAPT). This result happens ...
Parameterization of written signatures based on EFD

Martí i Puig, Pere; Danés Garolera, Jaume; Solé-Casals, Jordi (Springer, 2013)

In this work we propose a method to quantify written signatures from digitalized images based on the use of Elliptical Fourier Descriptors (EFD). As usually signatures are not represented as a closed contour, and being ...
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 ...
Score Function for Voice Activity Detection

Solé-Casals, Jordi; Martí i Puig, Pere; Reig Bolaño, Ramon; Zaiats, Vladimir (Springer, 2010)

In this paper we explore the use of non-linear transformations in order to improve the performance of an entropy based voice activity detector (VAD). The idea of using a non-linear transformation comes from some ...
Speech Enhancement: A Multivariate Empirical Mode Decomposition Approach

Solé-Casals, Jordi; Gallego Jutglà, Esteve; Martí i Puig, Pere; Travieso, Carlos M.; Alonso, Jesús B. (Springer, 2013)

Speech signals in real scenario ambient are usually mixed with some other signals, such as noise. This may interfere with posterior signal processing applied to the signals. In this work, a new technique of data denoising ...
Towards a low-complex breathing monitoring system based on acoustic signals

Martí i Puig, Pere; Solé-Casals, Jordi; Masferrer Caralt, Gerard; Gallego Jutglà, Esteve (Springer, 2013)

Monitoring the breathing is required in many applications of medical and health fields, but it can be used also in new game applications, for example. In this work, an automatic system for monitoring the breathing is ...
Two Families of Radix-2 FFT Algorithms With Ordered Input and Output Data

Martí i Puig, Pere (IEEE, 2009)

Two radix-2 families of fast Fourier transform (FFT) algorithms that have the property that both inputs and outputs are addressed in natural order are derived in this letter. The algorithms obtained have the same ...

Mostrando ítems 1-18 de 18

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Listar Documents de Congressos por autor "Martí i Puig, Pere"

Listar Documents de Congressos por autor "Martí i Puig, Pere"

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