AWGN信道基于高阶调制的LDPC码译码算法研究  

A Study of Decoding Algorithm for LDPC Codes Based on High Order Modulation over AWGN Channel

作　　者：钟竞东[1] 梁钊[1] 

机构地区：[1]五邑大学信息学院,广东江门529020

出　　处：《五邑大学学报（自然科学版）》2006年第2期28-32,共5页Journal of Wuyi University(Natural Science Edition)

基　　金：广东省自然科学基金项目(0411761);江门市科技计划项目[江科(2005)206]

摘　　要：介绍了AWGN信道基于高阶调制的软解调算法,研究了LDPC码的和-积译码算法原理,并对高阶调制的和-积算法及其简化算法进行了研究与性能仿真.仿真结果表明采用高阶调制的λ-min和-积简化算法译码在降低了译码复杂度的同时可实现高速率数据的可靠传输.In this paper, first, the high order soft demodulation algorithms based on AWGN were introduced. Then the basic encoding and decoding principles of LDPC codes were studied, and the sum-product algorithms with its reduced complexity algorithms were presented based on high order soft demodulation. Simulation result shows that the coded-modulation algorithms can work reliably in high speed digital communication.

关 键 词：QAM调制 LDPC码 Gray影射 和-积算法 二部图 λ-min算法 

分 类 号：TN911.21[电子电信—通信与信息系统] TN911.22[电子电信—信息与通信工程]