特殊低密度校验码在瑞利信道下的性能分析  

Performance Analysis of a Special Low-Density Parity Check Codes on Rayleigh Fading Channel

作　　者：董楠 DONG Nan(China Huayi Broadcasting Corporation Television Center,Fuzhou,350001,China)

机构地区：[1]中国华艺广播公司电视中心,福州350001

出　　处：《网络新媒体技术》2018年第4期41-44,F0003,共5页Network New Media Technology

摘　　要：低密度校验(LDPC)码是一种性能很好的信道纠错码。文中首先介绍了一种在加性高斯白噪声信道下具有低误码平层的非规则低密度校验码的构造方法,给出了瑞利衰落信道模型,并导出在该信道下修正的BP译码算法,进而用MATLAB工具对该码在瑞利衰落信道下的性能进行仿真,并对仿真结果进行了分析。Low-Density Parity Check（ LDPC） Codes are a type of channel codes of good performance. In this paper,firstly,a type of irregular LDPC of low error floor on AWGN channel is introduced,secondly,Rayleigh fading channel model is given out and modified BP algorithms on this channel is deduced,finally,simulations on this type of codes on Rayleigh fading channel are made,and simulation results are analyzed.

关 键 词：低密度校验码 密度演化法 误码平层 置信传播 

分 类 号：TN911.22[电子电信—通信与信息系统]