一种基于信道差异的极化码打孔算法  

A puncturing algorithm of polar code based on channel difference

作　　者：李世宝[1] 高迅 董振威 刘建航[2] LI Shi-bao;GAO Xun;DONG Zhen-wei;LIU Jian-hang(College of Oceanography and Space Informatics,China University of Petroleum(East China),Qingdao 266580,Shandong Province,China;College of Computer Science and Tech College of Computer Science and Technology,China University of Petroleum(East China),Qingdao 266580,Shandong Province,China)

机构地区：[1]中国石油大学(华东)海洋与空间信息学院,山东青岛266580 [2]中国石油大学(华东)计算机科学与技术学院,山东青岛266580

出　　处：《信息技术》2021年第6期12-15,21,共5页Information Technology

基　　金：国家自然科学基金(61972417);中央高校基本科研业务费专项资金资助项目(18CX02134A,19CX05003A-4);山东省研究生导师指导能力提升项目(SDYY18025)。

摘　　要：现有不重构的打孔算法未考虑打孔造成的信道初始值的差异性。针对这一问题,分析打孔比特造成的信道初始值差异性,提出一种基于信道差异的极化码打孔算法。首先分析打孔概率和信道初始值期望,以及无能力比特与打孔比特的映射关系,最终提出打孔算法。实验结果显示,所提算法可获得打孔算法性能的明显提升。The difference of channel initial value caused by puncturing is not considered in the existing algorithms without refactoring.In order to solve this problem,this paper analyzes the difference between the initial value of the channels caused by the puncturing bit and proposes a puncturing algorithm of polar code based on channel difference.Firstly,the puncturing probability and the expectation of the initial channel value are analyzed,and then the mapping relationship between the incapable bit and the puncturing bit is analyzed.Finally,the new puncturing algorithm is proposed.Experiment results show that the proposed algorithm can improve puncturing performance significantly.

关 键 词：极化码 打孔 信道极化 高斯近似 

分 类 号：TN911.22[电子电信—通信与信息系统]