未知相位信道下Turbo码编码DPSK信号的联合迭代解调解码

吴晓富;凌 聪;吕 晶

电子学报 ›› 2002, Vol. 30 ›› Issue (1) : 97-101.

PDF(215 KB)
PDF(215 KB)
电子学报 ›› 2002, Vol. 30 ›› Issue (1) : 97-101.
论文

未知相位信道下Turbo码编码DPSK信号的联合迭代解调解码

  • 吴晓富1,2, 凌 聪1, 吕 晶1
作者信息 +

Iterative Joint Demodulation and Decoding of Turbo Coded DPSK Signals over Unknown Phase Channels

  • WU Xiao-fu1,2, LING Cong1, LU Jin1
Author information +
文章历史 +

摘要

本文提出了未知相位信道下Turbo码编码DPSK信号的联合迭代解调解码算法.推导了未知相位信道的最大后验概率(MAP)算法,推导表明该MAP算法同样可用前向、后向递推方程来有效实现.其次,采用等效信道的方法将未知相位信道的Turbo码解码问题化为AWGN信道下Turbo码的解码问题.最后,引进了联合迭代解调解码算法,可用于Turbo码的解调解码.模拟表明本文算法可有效用于未知相位信道Turbo码的解码.

Abstract

In this paper,iterative joint demodulation and decoding of coded DPSK(differental phase shift keying)signals over an AWGN channel with unknown phase is presented.Firstly,the symbol-by-symbol maximum a posteriori probability (MAP) algorithm for an unknown phase channel is derived and it is shown that the MAP algorithm can be implemented efficiently using forward and backward recursions through the trellis.Secondly,the equivalent channel model approach is adopted and highlighted for subsequent systems to further process the channel MAP's output.Finally,the principle of iterative joint demodulation and decoding is introduced.The efficiency of the proposed algorithm is approved by many simulations.

关键词

未知相位信道 / Turbo码 / 最大后验概率算法

Key words

iterative decoding / MAP algorithm / differential phase shift keying / unknown phase channels / Turbo codes

引用本文

导出引用
吴晓富;凌 聪;吕 晶. 未知相位信道下Turbo码编码DPSK信号的联合迭代解调解码[J]. 电子学报, 2002, 30(1): 97-101.
WU Xiao-fu;LING Cong;LU Jin. Iterative Joint Demodulation and Decoding of Turbo Coded DPSK Signals over Unknown Phase Channels[J]. Acta Electronica Sinica, 2002, 30(1): 97-101.
中图分类号: TN919   
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