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LDPC码在二进制对称信道下的性能分析

Analysis of LDPC code performance over binary symmetric channel
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摘要 低密度校验码(LDPC)是一类线性分组纠错码,和积传递算法是LDPC码迭代译码算法中的常用算法.在此基础上研究了二进制对称信道(BSC)下LDPC码的消息传递迭代译码算法,对其误码特性进行了仿真,并用密度进化方法仿真了校验节点、变量节点的概率密度在迭代过程中的收敛情况.结果表明在给定的信道门限下LDPC码具有良好的纠错性能. Low-Density Parity-Check code (LDPC) is a kind of linear block error-correcting codes.Sum-product algorithm is an iterative decoding algorithms commonly used in LDPC code decoding.This paper studies into the LDPC code message passing iterative decoding algorithm under the binary symmetric channel (BSC) and simulates the bit error probability,then simulates the convergence of check nodes' and variable nodes' probability density in the iterative process using the method of density evolution.The result show that under a given channel threshold,LDPC code has a good correction performance.
出处 《东北师大学报(自然科学版)》 CAS CSCD 北大核心 2010年第1期59-62,共4页 Journal of Northeast Normal University(Natural Science Edition)
基金 国家自然科学基金资助项目(60802060)
关键词 低密度校验码 密度进化 和积算法 low density parity check codes density evolution sum-product algorithm
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参考文献7

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