动态扰动辅助的串行抵消双比特翻转Polar译码算法  

Decoding Algorithms for Polar Codes Based on Dynamic Perturbation-aided Successive Cancellation Flip with 2 Bits

作　　者：曾俏丽 陈海强[1,2] 周泉 刘远博 孙友明 黎相成[1,2] ZENG Qiaoli;CHEN Haiqiang;ZHOU Quan;LIU Yuanbo;SUN Youming;LI Xiangcheng(School of Computer,Electronics and Information,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Multimedia Communications and Network Technology,Nanning 530004,China)

机构地区：[1]广西大学计算机与电子信息学院,南宁530004 [2]广西多媒体通信与网络技术重点实验室,南宁530004

出　　处：《电讯技术》2024年第1期126-131,共6页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(62261003,61961004);广西重点研发计划(2021AB05081)。

摘　　要：针对串行抵消翻转译码算法(Successive Cancellation Flip,SCF)受限于单比特翻转而性能提升有限问题,提出了一种双比特翻转译码算法(Successive Cancellation Flip with 2 Bits,SCF2)。针对SCP算法扰动方差初始值固定的问题,设计了一种扰动方差可随码长和码率变化的改进SCP算法。在此基础上,结合翻转和扰动机制,提出了一种动态扰动辅助的串行抵消双比特翻转(Dynamic Perturbation-Aided SCF2,DPA-SCF2)译码算法,并对其译码复杂度和性能进行了分析。仿真结果显示,相比于列表长度为4的循环冗余校验辅助串行抵消列表(Cyclic Redundancy Check Aided Successive Cancellation List,CA-SCL)译码算法,所提算法最大可获得约0.5 dB的性能增益。To solve the performance limitation problem of the Successive Cancellation Flip(SCF)with single bit decoding algorithm,a Successive Cancellation Flip with 2 Bits(SCF2)decoding algorithm is proposed for polar code.Since the initial variance of the original Successive Cancellation Perturbation(SCP)algorithm is fixed,an improved SCP algorithm is presented based on a new designed perturbation variance strategy,in which the variance can vary with the code length and code rate.Furthermore,according to the flipping and permutation mechanism,a Dynamic Perturbation-aided SCF2(DPA-SCF2)decoding algorithm is presented and the decoding complexity and performance are analyzed.Simulation results show that,compared with the Cyclic Redundancy Check(CRC)aided Successive Cancellation List(CA-SCL)decoding algorithm,the proposed DPA-SCF2 algorithm can achieve performance gain about 0.5 dB.

关 键 词：Polar码 串行抵消翻转(SCF)译码 串行抵消扰动(SCP)译码 动态扰动 

分 类 号：TN911.22[电子电信—通信与信息系统]