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应用科学学报 ›› 2005, Vol. 23 ›› Issue (5): 457-460.

• 论文 • 上一篇    下一篇

基于迭代结构和MS估计的信源信道联合解码

周琳, 吴镇扬   

  1. 东南大学无线电工程系, 江苏南京 210096
  • 收稿日期:2004-05-30 修回日期:2004-08-27 出版日期:2005-09-30 发布日期:2005-09-30
  • 作者简介:周琳(1978-),女,江苏镇江人,博士生,E-mail:lin-joe@163.com;吴镇扬(1949-),男,江苏兴化人,教授,博导,E-mail:zhenyang@seu.edu.cn

Joint Source-Channel Decoding Based on Iterative Structure and MS Estimation

ZHOU Lin, WU Zhen-yang   

  1. Department of Radio Engineering, Southeast University, Nanjing 210096, China
  • Received:2004-05-30 Revised:2004-08-27 Online:2005-09-30 Published:2005-09-30

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摘要： 利用信源参数的非等概分布和时间相关性,以及软输入软输出信道解码提供的接收参数似然信息,提出了基于递归结构的联合信源信道解码算法.该算法由基于MS估计的软输入信源解码和基于迭代结构的维特比信道解码两部分组成.仿真实验表明对于具有时间相关性的高斯信源和加性高斯白噪声信道,与信源信道独立解码相比,联合算法得到的参数信噪比提高了近10 dB,有效提高了接收系统性能.

关键词: 递归结构, 联合信源信道解码, MS估计, 软输入信源解码, 迭代结构

Abstract: Using the non-uniform distribution and time domain correlation of source-encoded parameter and the soft-value provided by SISO channel decoder, a recursive joint source-channel decoding algorithm is proposed. The algorithm is composed of soft-bit source decoding based on MS estimation and Viterbi decoder based on iterative structure.Compared with separate source channel decoding, the joint algorithm has a gain in the parameter SNR of about 10 dB for colored Gaussian source and AWGN channel.

Key words: recursive structure, MS estimation, joint source-channel decoding, soft-bit source decoding, iterative structure

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