An implementation of nonlinear multiuser detection in Rayleigh fading channel

Authors:
Wai Yie Leong;John Homer;Danilo P. Mandic
Affiliations:
School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, QLD, Australia and Communications and Signal Processing Group, Department of Electrical and Ele ...;School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, QLD, Australia;Communications and Signal Processing Group, Department of Electrical and Electronic Engineering, Imperial College London, London, UK
Venue:
EURASIP Journal on Wireless Communications and Networking
Year:
2006

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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.