利用纠错编码的同频调制混合信号单通道盲分离

涂世龙; 陈越新; 郑辉

doi:10.3724/SP.J.1146.2008.01051

利用纠错编码的同频调制混合信号单通道盲分离

doi: 10.3724/SP.J.1146.2008.01051

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出版历程
- 收稿日期: 2008-08-28
- 修回日期: 2009-06-08
- 刊出日期: 2009-09-19

Exploiting Error-control Codes in Single-channel Blind Separation of Co-frequency Modulated Signals

摘要

摘要: 该文建立了同频调制编码混合信号的基本模型，提出了基于M-PSP的利用编码信息的单通道盲分离算法，重点研究了状态格图的构建、分支度量的计算和信道响应的跟踪。仿真结果表明，利用编码的单通道盲分离算法可以获得比不利用编码更好的性能，对于1/2码率的卷积编码BPSK信号，在误码率为10-4时，信噪比改善可达到2dB左右。
- 信号处理; 盲分离; 单通道; 纠错编码; M-PSP
Abstract: A basic model is established for mixtures of two co-frequency modulated signals with error-control codes, then an M-PSP based algorithm is proposed to exploit the error-control codes in its single-channel blind separation, with special emphasis on the construction of state trellis, the evaluation of branch metric and the tracking of channel responses. Simulation results show that the proposed algorithm is superior to the algorithms which bypass the error-control codes. For BPSK signals with rate-1/2 convolutional codes, a gain of about 2 dB in signal-noise ratio can be obtained at a bit error rate of 10-4.

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