基于CHASE译码思想的PCMA信号盲分离算法  

Algorithm for blind separation of PCMA based on CHASE decoding

作　　者：杜健[1] 巩克现[1] 彭华[1] 

机构地区：[1]信息工程大学信息系统工程学院,河南郑州450002

出　　处：《通信学报》2015年第3期94-99,共6页Journal on Communications

基　　金：国家自然科学基金资助项目(61072046);国防基金资助项目(9140C860103120C8601);河南省基础与前沿计划基金资助项目(132300410049)~~

摘　　要：在软输出逐幸存路径处理(SOVA-PSP)算法的基础上,提出了基于CHASE译码思想的载波成对复用多址(PCMA)信号的盲分离算法。该算法对SOVA-PSP软输出的结果进行可靠性排序,对于排序中可靠性较低的混合符号进行信号重构,通过重构信号和接收信号之间的欧式距离对比纠正其中的错误结果。仿真结果表明,所提算法与SOVA-PSP算法相比,性能有2 dB左右的增益。On the basis of SOVA-PSP, a novel algorithm for blind separation of PCMA signal was presented based on CHASE decoding. The results of soft output of SOVA-PSP were sorted based on reliability in the algorithm, the mixed symbols that had low reliability in the sorted results were reconstructed. Compared the euclidian distance between recon- structed signal and received signal, the wrong results can be corrected. Simulation results show that compared with the SOVA-PSP algorithm, the novel algorithm can improve the ~ain of aho, t 2 dR

关 键 词：成对载波多址 逐幸存路径处理 CHASE译码 单通道盲分离 

分 类 号：TN911.7[电子电信—通信与信息系统]