极化码的连续消除译码性能改进方法  

Methods for Enhancing Successive Cancellation Decoding of Polar Codes

作　　者：袁辽 倪卫明[1] 

机构地区：[1]复旦大学信息科学与工程学院,上海200433

出　　处：《微型电脑应用》2017年第11期42-45,共4页Microcomputer Applications

摘　　要：研究了极化码的连续消除译码性能改进方法。提出了两种改进算法,分别为双路径判决延迟译码和含阈值可变路径判决延迟译码。传统的连续消除译码算法为码树上贪婪算法,不能修正在当前节点之前的判决错误。利用判决延迟译码来为当前译码节点提供修正上一个节点判决错误的机会。提出的双路径和含阈值可变路径的判决延迟译码通过增加译码码树中的计算节点和增加存储空间来提升译码性能。仿真结果显示双路径判决延迟译码比较于传统的连续消除译码方式,对译码性能有1.1dB左右的增益,含阈值可变路径判决延迟译码有进一步的译码增益效果。In this paper,we study methods to enhance successive cancellation decoding of polar codes.We propose two improved algorithms：two-path decision delay decoding and variable path decision delay decoding with the threshold.Conventional successive cancellation decoding is greedy algorithm in code tree,it means that successive cancellation decoding can＇t correct errors from the former nodes.In this paper,the decision delay decoding is used to provide opportunity to correct previous error for the current node.The proposed two-path and variable path decision delay decoding can improve the decoding performance by increasing the computing nodes and increasing the storage space.The simulation results show that compared to successive cancellation decoding,the two-path decision delay decoding has 1.1 dB gain on decoding performance.In addition,variable path decision delay decoding has more gain.

关 键 词：极化码 连续消除译码 判决延迟译码 双路径判决延迟译码 

分 类 号：TN911.22[电子电信—通信与信息系统]