摘要
将二维映射下的软输入软输出解映射MAX-LOG-MAP算法扩展到多维映射比特交织编码调制及迭代译码(BICM-ID)系统,并首次结合多天线系统下的列表球形译码,提出一种简化MD-LSD(multi-dimensional list sphere decoding)算法。新算法大幅降低了多维解映射的计算复杂度。仿真结果表明,列表长度满足一定范围时,采用简化MD-LSD算法解映射算法的性能损失可以忽略。
The soft in soft out MAX-LOG-MAP algorithm of conventional mappings was expanded to the BICM-ID system with multi-dimensional mappings. A multi-dimensional list sphere decoding (MD-LSD) algorithm was also proposed by using the list sphere decoding algorithm of multi-antenna systems. Compared with the MD-MAX-LOG-MAP algorithm, the computational complexity of MD-LSD was decreased significantly. Simulation results show that the performance degradation of the simplified MD-LSD algorithm can be ignored when the list length is in a certain range.
出处
《通信学报》
EI
CSCD
北大核心
2008年第2期111-115,共5页
Journal on Communications
基金
国家高技术研究发展计划("863"计划)基金资助项目(2006AA01Z270)
国家自然科学基金资助项目(60496316)
陕西省自然科学基金资助项目(2007F07)~~
关键词
BICM-ID
多维映射
软输入软输出解映射
多维列表球形译码
bit-interleaved coded modulation with iterative decoding
multi-dimensional mapping
soft in soft out demapper
multi-dimensional list sphere decoding