电子学报 ›› 2018, Vol. 46 ›› Issue (6): 1454-1460.DOI: 10.3969/j.issn.0372-2112.2018.06.026

• 学术论文 • 上一篇    下一篇

基于软信息的分组交织和卷积码联合识别

陈泽亮, 巩克现, 彭华, 于沛东   

  1. 信息工程大学信息系统工程学院, 河南郑州 450002
  • 收稿日期:2017-02-27 修回日期:2017-07-03 出版日期:2018-06-25 发布日期:2018-06-25
  • 作者简介:陈泽亮,男,1992年4月出生于湖南岳阳.信息工程大学硕士生,主要研究方向为信道编码识别分析.E-mail:zelchen@163.com;巩克现,男,1976年8月出生于山东泰安.信息工程大学副教授、硕士生导师,主要研究方向为信道编码分析、通信信号处理等.E-mail:ggkx@163.com
  • 基金资助:
    国家自然科学基金(No.61401511)

Joint Blind Recognition of Packet Interleaver and Convolution Code Based on Soft Information

CHEN Ze-liang, GONG Ke-xian, PENG Hua, YU Pei-dong   

  1. Information Engineering University, Zhengzhou, Henan 450002, China
  • Received:2017-02-27 Revised:2017-07-03 Online:2018-06-25 Published:2018-06-25

摘要: 针对非合作数字通信系统中分组交织和卷积码的盲识别问题,提出了一种基于软信息的信道编码识别方法.该方法利用软信息建立了符合度的概念,首先利用采样序列的总符合度实现交织行数和卷积码校验向量的识别;然后通过每路采样序列平均符合度的变化规律实现交织起点行坐标的识别;最后根据解交织后数据的符合度实现交织列数和交织起点列坐标的识别.仿真结果表明,本文算法能在较高误码率下实现分组交织和卷积码的盲识别,与硬判决算法相比,达到较高正确率时,本文算法具有约5dB的信噪比增益.

关键词: 非合作数字通信系统, 分组交织, 卷积码, 盲识别, 软信息, 信道编码

Abstract: A blind recognition method of channel coding based on soft information was proposed for packet interleaver and convolution code in a non-cooperative digital communication system.The method builds conformity degree concept using the soft information.It identifies the row number of interleaving matrix and the parity-check vector of convolution code by using the total conformity degree of the sample sequence.And the row coordinate of starting point is identified by the change rule of average conformity degree of each sampling sequence.Finally,the column number of interleaving matrix and the column coordinate of starting point are recognized according to the conformity degree of de-interleaved data.Simulation results show that the proposed method provides an optimal performance in the noisy environment,and has 5dB SNR gain when achieving the relatively high accuracy compared with the recognition algorithm based on hard information.

Key words: non-cooperative digital communication system, packet interleaver, convolution code, blind recognition, soft information, channel coding

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