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.
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)
