光通信系统中LDPC码构造方法的研究进展  

Research progress on the LDPC codes construction method in optical communication systems

作　　者：袁建国[1] 汪哲[1] 孙雪敏 郭乔[1] 胡潇月 吴英冬 

机构地区：[1]重庆邮电大学光电信息感测与传输技术重庆市重点实验室,重庆400065

出　　处：《激光杂志》2017年第11期1-7,共7页Laser Journal

基　　金：国家自然科学基金项目(61472464);重庆市基础与前沿研究计划项目(cstc2015jcyjA0554);2016年重庆邮电大学大学生科研训练计划项目(A2016-61)

摘　　要：随着光通信系统的迅速发展,低密度奇偶校验(Low-Density Parity-Check,LDPC)码因其纠错能力强、构造方法灵活、译码复杂度低等优点而成为光通信系统中的研究与应用热点。由于LDPC码纠错性能主要取决于其校验矩阵的构造,因而文章针对适用于光通信系统中LDPC码的校验矩阵构造方法展开了综述性研究。文章从LDPC码的概念、校验矩阵及其Tanner图表达方式、影响LDPC码性能的因素以及LDPC码的随机构造方法和结构化构造方法等方面,综述了光通信系统中LDPC码构造方法的研究进展。分析总结了目前适用于光通信系统中LDPC码构造方法研究中亟待解决的关键问题,为今后深入开展相关研究提供理论指导。With the rapid development of optical communication system,low density parity check（ LDPC） codes with some advantages such as the better error correction performance,the flexible construction method and the low decoding complexity become the research and application hotspot. Because the error correction performance of LDPC codes is mainly determined by the construction of the parity check matrix,the article summarily studies the parity check matrix construction method of the LDPC codes which suits the optical communication system. The research progress is overviewed in the aspects such as the concept of the LDPC code,the parity check matrix and the expressions of the Tanner graph,the factors that affect the the LDPC code performance,as well as the random construction method and the structured construction method of LDPC codes. Furthermore,the key problems to be solved are also investigated in the construction method. It plays a very important theoretical guidance role in the related research.

关 键 词：低密度奇偶校验码 校验矩阵 随机构造 结构化构造 光通信系统 

分 类 号：TN249[电子电信—物理电子学]