卷积LDPC码流水线译码器的改进方法  

A Method to Improve Pipeline Decoder of LDPC Convolutional Codes

作　　者：张涛[1] 曾明[2] 

机构地区：[1]重庆邮电大学重庆市移动通信重点实验室,重庆400065 [2]中国电子科技集团第53研究所,辽宁锦州121000

出　　处：《数字技术与应用》2013年第1期183-185,共3页Digital Technology & Application

基　　金：国家自然科学基金(60972053)

摘　　要：较高的译码复杂度和较长的初始译码时延是卷积LDPC码流水线译码器两个潜在的问题。本文提出一种通过在计算校验节点信息时引入乘积因子的方法降低各节点信息之间的相关性,从而提高译码效率,一定程度上降低了译码迭代次数。仿真结果表明,该译码算法缩短了译码器的初始时延,同时也降低了译码复杂度,从而使得译码器的性能得到改善。Potentially large storage requirements and long initial decoding delays are two practical issues related to the decoding of low-density parity- check（LDPC）convohitional codes using a continuous pipeline decoder architecture.In this paper,we propose a method to improve the efficiency of the decoder, which introduces a multiplicative factor in the calculation of the check node＇s propagation information to reduce the dependency between each node.to some extent,it reduces the iteration number of decoding.Simulation results show that the decoding algorithm not only shortens the initial delay of decoder but also reduces the decoding comolexitv_restdtin~ in the imnroved t^erformance of decoder.

关 键 词：卷积码 LDPC码 乘积因子 流水线译码器 

分 类 号：TN911[电子电信—通信与信息系统]