一种基于校验矩阵的非系统卷积码识别方法  

Method of Recognition for Nonsystematic Convolutional Code Based on Parity Matrix

作　　者：眭惠巧[1] 赵一菲 李亮辉[1] 温子欣 SUI Huiqiao;ZHAO Yifei;LI Lianghui;WEN Zixin(The 54th Research Institute of CETC,Shijiazhuang 050081,China;School of Artificial Intelligence,Hebei University of Technology,Tianjin 300401,China;School of Integrated Circuit Science and Engineering,Tianjin University of Technology,Tianjin 300000,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]河北工业大学人工智能与数据科学学院,天津300401 [3]天津理工大学集成电路科学与工程学院,天津300000

出　　处：《无线电通信技术》2022年第3期555-558,共4页Radio Communications Technology

基　　金：中央引导地方科技发展资金项目(206Z0701G)。

摘　　要：信道编码识别是通信侦察中的关键技术,针对非系统卷积码现有识别方法存在运算量大、效率低、工程实现难等问题,提出了一种基于校验矩阵的信道编码识别方法,通过建立常用非系统卷积码基本校验矩阵集,将通信侦察系统解调后数据与基本校验矩阵相乘获取校验通过率统计值,再根据匹配阈值确定待侦察系统的编码方式。采用的方法具有运算量小、易于工程实现的优点,理论推导和仿真试验均验证了新方法的有效性,解调误码率为3‰的情况下编码识别正确率优于90%。Recognition of Channel code is one key technique in communication reconnaissance.Present methods of recognition for Nonsystematic convolutional code are limited by complex calculation and low efficiency,making it difficult to realize.A method of recognition for nonsystematic convolutional code based on parity matrix is presented in this paper.In this method,the set of basic parity matrix is constructed first.Then the verification pass rate is obtained by multiplying the data stream output of reconnaissance receiver with the basic parity matrix.Finally the convolutional code type is obtained by comparing verification pass rate with selected threshold value.The method is validated in theory and by simulation.Simulation result shows that 90%accuracy rate of recognition can be obtained with data steam of 3‰bit error rate.

关 键 词：通信侦察 非系统卷积码 校验矩阵 卷积码识别 

分 类 号：TN911.22[电子电信—通信与信息系统]