多维映射BICM-ID系统的SISO解映射算法

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Soft in soft out demapper for the BICM-ID system with multi-dimensional mappings

GONG Feng-kui;GE Jian-hua;WANG Yong

(State Key Lab. of Integrated Service Networks, Xidian Univ., Xi′an 710071， China)

Received:1900-01-01 Revised:1900-01-01 Online:2007-12-20 Published:2007-12-20

Abstract

Abstract: By modifying the probability function of the MAX-LOG-MAP algorithm of two-dimensional mappings, a soft in soft out demapper is derived for BICM-ID with multi-dimensional mapping. By combining with the tree-searching algorithm of multi-antenna systems, a simplified multi-dimensional tree-searching algorithm (MD-TS) is also proposed, whose computational complexity is decreased significantly by selecting the symbol vectors with high probability. The reduced complexity is in proportion to the list length. Computer simulations show that the asymptotic BER performance is improved compared with two-dimensional mappings and that the simplified MD-TS algorithm brings only about 02dB performance degradation.

Key words: bit-interleaved coded modulation with iterative decoding, multi-dimensional mapping, soft in soft out demapper, multi-dimensional tree-searching algorithm

CLC Number:

TN911

GONG Feng-kui;GE Jian-hua;WANG Yong. Soft in soft out demapper for the BICM-ID system with multi-dimensional mappings
[J].J4, 2007, 34(6): 895-899.

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Soft in soft out demapper for the BICM-ID system with multi-dimensional mappings

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