On the basis of SOVA-PSP, a novel algorithm for blind separation of PCMA signalwaspresented 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 gain of about 2 dB.%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。
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