Factor-Graph-Based Soft Self-Iterative Equalizer for Multipath Channels
© Lu et al. 2005
Received: 30 April 2004
Published: 28 April 2005
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.
Keywordsfactor graph equalizer iterative processing multipath fading MIMO
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