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A Joint Optimization Criterion for Blind DS-CDMA Detection

EURASIP Journal on Advances in Signal Processing20062007:079248

https://doi.org/10.1155/2007/79248

Received: 30 September 2005

Accepted: 11 June 2006

Published: 7 September 2006

Abstract

This paper addresses the problem of the blind detection of a desired user in an asynchronous DS-CDMA communications system with multipath propagation channels. Starting from the inverse filter criterion introduced by Tugnait and Li in 2001, we propose to tackle the problem in the context of the blind signal extraction methods for ICA. In order to improve the performance of the detector, we present a criterion based on the joint optimization of several higher-order statistics of the outputs. An algorithm that optimizes the proposed criterion is described, and its improved performance and robustness with respect to the near-far problem are corroborated through simulations. Additionally, a simulation using measurements on a real software-radio platform at 5 GHz has also been performed.

Keywords

Communication SystemImprove PerformanceQuantum InformationOptimization CriterionPropagation Channel

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Authors’ Affiliations

(1)
Departamento de Teoría de la Señal y Comunicaciones, Escuela Técnica Superior de Ingenieros, Universidad de Sevilla, Sevilla, Spain

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Copyright

© I. Durán-Díaz and S. A. Cruces-Alvarez 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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