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Iterative parallel-trellis MAP equalizers with nonuniformly-spaced prefilters for sparse multipath channels
Proceedings IEEE 56th Vehicular Technology Conference
A maximum a posteriori (MAP) equalizer is derived in this paper by formulating the forward/backward recursion MAP algorithm (i.e. the BCJR algorithm) on a paralleltrellis representation that was previously proposed for equalizing sparse multipath channels. Several enhancements are suggested to further improve the performance and/or reduce the complexity of the resultant MAP equalizer. Results show that the paralleltrellis MAP equalizers utilizing 2-state trellises are the predominant structuresdoi:10.1109/vetecf.2002.1040610 fatcat:2i6tz77n6rdldptyxuyhsizami