一种抑制LDPC码环路影响的软件方法  

A Software Method for Restricting the Influence of LDPC Codes' Loops

作　　者：野晓东[1] 马林华[1] 王卫民[1] 于瑞[1] 

机构地区：[1]空军工程大学工程学院,西安710038

出　　处：《电光与控制》2009年第9期83-85,88,共4页Electronics Optics & Control

摘　　要：对低密度奇偶校验码(LDPC)在AWGN(Additive White Gaussian Noise)信道下的译码算法进行了深入研究,分析了在译码过程中出现突发错误的原因,指出出现这种错误是由于在校验矩阵中存在环路,提出了一种抑制突发错误的软件方法。在该方法中,只需对LDPC码的译码程序进行适当控制,就可有效抑制由于环路影响而出现的突发错误,进一步提高了LDPC码的译码性能和译码程序的稳定性,扩大了LDPC码的应用空间。The decoding algorithm of Low-Density Parity-Check Codes （LDPC） codes over Additive White Gaussian Noise （AWGN） channel is studied. The reason for emerging of incidental errors in decoding process is analyzed, which lies in that there are loops in the parity-check matrix. Then a software method is proposed for restricting the incidental error. In the method, the incidental errors caused by the loops can be restricted effectively on only by properly controlling the decoding program of LDPC. By this method, the decoding performance of LDPC codes and decoding program stabilization are improved greatly, which may make LDPC codes find wider application.

关 键 词：低密度奇偶校验码 环路 突发错误 

分 类 号：V243.1[航空宇航科学与技术—飞行器设计] TN911.22[电子电信—通信与信息系统]