Open Access

An Implementation of Nonlinear Multiuser Detection in Rayleigh Fading Channel

EURASIP Journal on Wireless Communications and Networking20062006:045647

DOI: 10.1155/WCN/2006/45647

Received: 14 May 2005

Accepted: 6 February 2006

Published: 20 March 2006

Abstract

A blind nonlinear interference cancellation receiver for code-division multiple-access- (CDMA-) based communication systems operating over Rayleigh flat-fading channels is proposed. The receiver which assumes knowledge of the signature waveforms of all the users is implemented in an asynchronous CDMA environment. Unlike the conventional MMSE receiver, the proposed blind ICA multiuser detector is shown to be robust without training sequences and with only knowledge of the signature waveforms. It has achieved nearly the same performance of the conventional training-based MMSE receiver. Several comparisons and experiments are performed based on examining BER performance in AWGN and Rayleigh fading in order to verify the validity of the proposed blind ICA multiuser detector.

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Authors’ Affiliations

(1)
School of Information Technology and Electrical Engineering, The University of Queensland
(2)
Communications and Signal Processing Group, Department of Electrical and Electronic Engineering, Imperial College London

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Copyright

© Wai Yie Leong et al. 2006

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.