Turbo译码SOVA算法的研究与实现  

Research and implementation of Turbo decoding SOVA algorithm

作　　者：王丹飞 宋俊慷 夏慧宁 Wang Danfei;Song Junkang;Xia Huining(Beijing Aerospace Yuxing Technology Co.,Ltd.,Zhengzhou 450018,China;Guangxi Minzu Normal University,Chongzuo 532200,China)

机构地区：[1]北京航天驭星科技有限公司,河南郑州450018 [2]广西民族师范学院,广西崇左532200

出　　处：《电子技术应用》2024年第3期109-114,共6页Application of Electronic Technique

基　　金：2022年度广西高等教育本科教学改革工程项目(2022JGB388)。

摘　　要：针对低轨道卫星通信的应用需求,为了降低干扰,减小负荷,通常采用卷积码、Turbo码等信道编码的方法提升传输的可靠性能。Turbo码是一种具有接近香农极限定理的优异信道码,SOVA译码是Turbo码的一种译码方法。以CCSDS推荐的Turbo码为例,研究了网格图在SOVA译码过程中的功能和用法,并与Viterbi译码进行了对比,并基于网格图详细阐述了SOVA译码的原理和实现步骤,最后对SOVA译码的实现过程进行了仿真验证。该方法已实际应用于项目,经测试该方法实现简单,获得了良好的信道编码增益。For the application requirements of low-orbit satellite communication,in order to reduce interference and load,convolutional codes,Turbo codes and other channel coding methods are usually used to improve the reliability of transmission.Turbo code is an excellent channel code with close to Shannon's limit theorem.SOVA decoding is one of the decoding methods of Turbo codes.Taking Turbo code recommended by CCSDS as an example,this paper studies the function and usage of grid graph in the process of SOVA decoding,and compares it with Viterbi decoding.Based on the grid graph,the principle and implementation steps of SOVA decoding are described in detail.Finally,the implementation process of SOVA decoding is verified by simulation.The method has been applied to the project,and the good channel coding gain is obtained simply by testing.

关 键 词：CCSDS标准 SOVA译码 网格图 卫星通信 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]