一种改进的奇偶校验比特辅助极化码译码  

An Improved Parity Check Bit Aided Polarization Code Decoding

作　　者：邱明仁 马秀荣[1] 单云龙[1] 沈园园 QIU Ming-ren;MA Xiu-rong;SHAN Yun-long;SHEN Yuan-yuan(School of Electrical and Electronic Engineering,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学集成电路科学与工程学院,天津300384

出　　处：《计算机仿真》2023年第11期165-169,323,共6页Computer Simulation

基　　金：基于导频的高速光通信系统IQ不平衡估计与补偿研究(2017ZD15)。

摘　　要：极化码奇偶校验比特辅助的串行抵消列表(PC-SCL)译码算法利用奇偶校验比特检测出错误路径并剪枝提升性能,但未分析译码过程中发生奇、偶数个错误的频率不均问题。极化码交替加权奇偶校验比特辅助的串行抵消列表(AWPC-SCL)译码算法中每个校验比特由对应检验段内的信息比特交替加权编码得到,虽然解决了奇、偶数个错误频率不均的问题,但未分析校验比特放置的位置对译码性能的影响。通过结合极化码生成矩阵最小汉明重量行索引和蒙特卡罗仿真结果,规定了校验比特的编码方式和放置位置的选取规则,提出了一种改进的交替加权奇偶检验比特辅助串行抵消列表(IAWPC-SCL)译码算法。仿真结果表明,与AWPC-SCL译码算法相比,IAWPC-SCL译码算法在误帧率为10^(-4)时,译码性能大约提升了0.3dB。The polar code parity-check bit-assisted serial cancellation list(PC-SCL)decoding algorithm uses parity-check bits to detect erroneous paths and prune to improve performance,but does not analyze the odd and even errors occurring during the decoding process.In the polar code alternately weighted parity check bit-assisted serial cancellation list(AWPC-SCL)decoding algorithm,each check bit is obtained by alternately weighted coding of the information bits in the corresponding check segment.Although the uneven frequency of odd and even errors has been addressed,the impact of the placement of parity bits on decoding performance has not been analyzed.By combining the minimum Hamming weight row index of the polar code generator matrix and the Monte Carlo simulation results,this paper specifies the coding method and placement rules of the parity bits,and proposes an improved alternately weighted parity check bit-assisted serialization cancellation list(IAWPC-SCL)decoding algorithm.The simulation results show that,compared with the AWPC-SCL decoding algorithm,the IAWPC-SCL decoding algorithm improves the decoding performance by about 0.3dB when the frame error rate is 10^(-4).

关 键 词：极化码 串行抵消列表 奇偶校验 汉明权重 蒙特卡罗 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]