极化码特定码型的快速译码  

Fast Decoding of Specific Patterns of Polar Codes

作　　者：钟储苓 程方[1] ZHONG Chuling;CHENG Fang(School of Communication and Information Engineering,Chongqing University of Postsand Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《电讯技术》2020年第12期1480-1484,共5页Telecommunication Engineering

基　　金：重庆市重点产业共性关键技术创新重大主题专项项目(cstc2017zdcy-zdzx003)。

摘　　要：在5G通信网络中,极化码作为一种高性能纠错码技术,应用于广播信道以及控制信道。针对极化码串行抵消(Successive Cancellation,SC)译码算法存在冗余运算、译码时延过高的问题,在传统的串行抵消译码算法基础上,提出了对三种不同码型的快速译码方法,避免了对子节点的遍历,消除了冗余。通过理论分析该特定码型的快速译码方法,在不改变译码的误码率的条件下,这三种特定码型的时钟消耗从t-3、t-3、2t-5减小为1、1、2,大大降低了译码时延。In 5G communication networks,polar code is used as coding schemes for broadcast channels and control channels.For the problems of the redundant cancellation and the excessively high decoding delay of the polar code successive cancellation(SC)decoding algorithm,three different node types and their fast decoding methods are proposed based on the traditional SC decoding algorithm,in which traversal of child nodes is avoided and redundancy is reduced.Through theoretical analysis,the clock consumption of three specific patterns is reduced from t-3,t-3,2t-5 to 1,1,2,respectively.The fast decoding method for a specific code pattern greatly reduces the decoding latency without changing the bit error rate of the decoding.

关 键 词：5G通信网络 极化码 串行抵消译码 最大似然 简化串行译码 

分 类 号：TN911.2[电子电信—通信与信息系统]