IEEE802.16e标准下LDPC码译码性能分析  

Analysis of LDPC Decode Performance under IEEE802. 16e Standard

作　　者：张亚林 蔚保国 范广伟 

机构地区：[1]河北省卫星导航技术与装备工程技术研究中心,河北石家庄050081

出　　处：《无线电工程》2013年第11期8-10,32,共4页Radio Engineering

基　　金：国家高技术研究发展计划("863"计划)资助项目(2011BAH05B02)

摘　　要：LDPC码是一种逼近香农极限的线性分组码。对IEEE802.16e标准下LDPC码校验矩阵的构造及硬判决算法、BP算法、Log-BP算法和Min-Sum算法原理进行了简单介绍。基于Matlab仿真对不同码长译码性能及不同方法译码性能进行分析比较,结果显示随着码长的增加LDPC译码性能变好,讨论的几种译码算法中硬判决译码性能较差,Min-Sum译码好于硬判决译码,但稍差于BP译码和Log-BP译码,BP译码和Log-BP译码性能较好且基本一致。LDPC is a kind of linear group code,near Shannon limit performance. The paper introduces the method of constructing check matrix and the principle of hard decision,BP,Log-BP and Min-Sum. It also analyses the performance of LDPC with different lengths and different decode methods based on Matlab simulation. The result indicates that the decode performance becomes better as the code length increases,and among the decoding algorithms discussed in the paper,the performance of Min-Sum is better than that of hard decision,while the performance of BP is the best as that of Log-BP.

关 键 词：IEEE802 16e标准 LDPC码校验矩阵 硬判决译码算法 BP算法 

分 类 号：TN91[电子电信—通信与信息系统]