Open Access

Low-Complexity Iterative Receiver for Space-Time Coded Signals over Frequency Selective Channels

EURASIP Journal on Advances in Signal Processing20022002:949532

DOI: 10.1155/S1110865702203054

Received: 31 May 2001

Published: 30 May 2002

Abstract

We propose a low-complexity turbo-detector scheme for frequency selective multiple-input multiple-output channels. The detection part of the receiver is based on a List-type MAP equalizer which is a state-reduction algorithm of the MAP algorithm using per-survivor technique. This alternative achieves a good tradeoff between performance and complexity provided a small amount of the channel is neglected. In order to induce the good performance of this equalizer, we propose to use a whitened matched filter (WMF) which leads to a white-noise "minimum phase" channel model. Simulation results show that the use of the WMF yields significant improvement, particularly over severe channels. Thanks to the iterative turbo processing (detection and decoding are iterated several times), the performance loss due to the use of the suboptimum List-type equalizer is recovered.

Keywords

space-time coded MIMO channel equalization per-survivor processing multidimensional whitened matched filter turbo detection

Authors’ Affiliations

(1)
France Télécom R&D
(2)
Équipe de Traitement des Images et du Signal, ENSEA-Université de Cergy Pontoise
(3)
Sup'Com, Route de Raoued Km 3.5

Copyright

© Sellami et al. 2002