Iterative Detection for Interleave Division Multiple Access in Channels with Intersymbol Interference

Lihai LIU
Wai Kong LEUNG

IEICE TRANSACTIONS on Communications   Vol.E87-B    No.11    pp.3274-3280
Publication Date: 2004/11/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
CDMA,  ISI channels,  iterative decoding,  multiuser detection,  

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This paper is concerned with the signal processing aspects of the recently proposed interleave-division multiple-access (IDMA) scheme. We propose several low-cost detection algorithms to solve the problems of multiple-access, cross-antenna and intersymbol interference (ISI). The complexities (per user) of these algorithms are very low and increase either linearly or quadratically with the number of paths. It is shown that an IDMA system with a rate- 16-state convolutional code and a length-8 spreading sequence can support more than 100 users in a multipath fading channel with two receive antennas. This clearly indicates the great potential of IDMA systems.