一种基于Turbo迭代处理实现PCMA信号盲恢复算法

一种基于Turbo迭代处理实现PCMA信号盲恢复算法 A Blind Data Recovery of PCMA Signals Based on the Turbo Iterative Processing 张冬玲 ZHANG Dongling 1 first-author 张君 ZHANG Jun 1 李静 LI Jing 1 葛临东 GE Lindong 1 信息工程大学信息工程学院 信息工程大学信息工程学院 Information Engineering College,Information Engineering University Information Engineering College,Information Engineering University 针对非协作通信中同频线性调制混合的PCMA信号盲恢复问题,基于Turbo迭代处理算法思想,建立了PCMA基带接收系统模型,提出了一种联合解调和译码实现PCMA信号中各路源信号盲恢复算法.通过分析和推导,给出了一种混合信号解映射的方法.该算法不需要进行混合信号分离,而是直接从接收信号中估计出每路发送的信息序列,一步完成混合信号的分离、解调和译码.仿真结果表明,无论对于无码间干扰的AWGN信道还是ISI信道,算法都能得到较低的BER（Bit Error Rate,误码率）,算法对等功率混合信号和不等功率混合信号同样适用. This paper focuses on the blind separation and the data recovery of multiple co-frequency linear modulation PCMA signals which are the important and touchy issue in uncooperative communications.A novel method based on the Turbo iterative Processing algorithm is proposed,which combines demodulation with decoding and can recover multiple source signals from a PCMA signal,and a corresponding model of receiving system for PCMA signals is also established in this paper.Based on the theoretical analysis and the mathematical derivation an algorithm for demapping of mixed signals is provided.Theoretical analysis and simulation results show that the new algorithm can directly recover all the source signals in a PCMA signal without the need of separating the mixed signals.The algorithm is of the advantage of low computational complexity and low BER for ISI AWGN channels being suitable for different modulation types and also for the situations of equivalent as well as non-equivalent power mixed signals. 盲分离 单通道 成对载波多址（PCMA） 迭代译码 软解映射 软输入/软输出 blind separation single-channel PCMA iterative decode soft demapping algorithms soft-in soft-out（SISO） 10.14188/j.1671-8836.2011.05.003 TN911.2 国家自然科学基金资助项目（61072046） 2011-05-01 2021-04-01 5 57