Received value flipping based sphere decoding algorithm for polar codes  

作　　者：Rui Wang Haiqiang Chen Yan Chen Yuanbo Liu Xiangcheng Li Youming Sun Qingnian Li 

机构地区：[1]School of Computer and Electronic Information,Guangxi University,Nanning 530004,China [2]Guangxi Key Laboratory of Multimedia Communications and Network Technology,Guangxi University,Nanning 530004,China [3]College of Information Engineering,Nanning University,Nanning 530004,China

出　　处：《Intelligent and Converged Networks》2024年第4期370-379,共10页智能与融合网络(英文)

基　　金：supported by the National Natural Science Foundation of China(Nos.61961004,62261003,and 62361003);the Key Research and Development Program of Guangxi(No.GuiKeAB22080048);the Counterpart Aid Project for Discipline Construction from Guangxi University(No.2023N04).

摘　　要：Polar codes are considered as one of the most competitive channel coding schemes for the future wireless communication system.To improve the performance of polar codes with short code-length for control channels,a sphere decoding algorithm based on received value flipping is proposed in this paper.When a codeword fails the cyclic redundancy check,the algorithm flips the received value with low reliability and forms a new received sequence.Then,this new sequence is sent to the decoder for another decoding attempt.In addition,we also compare the performance of different flipping sets and evaluate the influence of the associated flipping set sizes.Simulation results show that,the proposed algorithm can achieve performance improvement over additive white Gaussian noise channel with acceptable complexity.For the(64,16)polar code,the proposed algorithm can achieve about 0.23 dB 10-3performance gain at frame error rate=,compared to the conventional sphere decoding algorithm.Finally,we also verify the applicability of the proposed algorithm over Rayleigh fading channel and observe similar results.

关 键 词：polar codes sphere decoding bit flipping row weight polarization weight 

分 类 号：TN9[电子电信—信息与通信工程]