Open Access

Factor-Graph-Based Soft Self-Iterative Equalizer for Multipath Channels

EURASIP Journal on Wireless Communications and Networking20052005:687651

https://doi.org/10.1155/WCN.2005.187

Received: 30 April 2004

Published: 28 April 2005

Abstract

We consider factor-graph-based soft self-iterative equalization in wireless multipath channels. Since factor graphs are able to characterize multipath channels to per-path level, the corresponding soft self-iterative equalizer possesses reduced computational complexity in sparse multipath channels. The performance of the considered self-iterative equalizer is analyzed in both single-antenna and multiple-antenna multipath channels. When factor graphs of multipath channels have no cycles or mild cycle conditions, the considered self-iterative equalizer can converge to optimum performance after a few iterations; but it may suffer local convergence in channels with severe cycle conditions.

Keywords

factor graph equalizer iterative processing multipath fading MIMO

Authors’ Affiliations

(1)
Silicon Laboratories, Inc.
(2)
NEC Laboratories America, Inc.
(3)
Department of Electrical Engineering, Columbia University

Copyright

© Lu et al. 2005

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.