CRC-PAC码的自适应移位修剪列表译码算法  

Adaptive List Decoding of CRC-PAC with Shifted-Pruning

作　　者：楼俊豪 黄志亮[1] 张莜燕 周水红[1] LOU Junhao;HUANG Zhiliang;ZHANG Youyan;ZHOU Shuihong(School of Computer Science and Technology,Zhejiang Normal University,Jinhua 321004,China)

机构地区：[1]浙江师范大学计算机科学与技术学院,浙江金华321004

出　　处：《无线电通信技术》2025年第1期155-160,共6页Radio Communications Technology

摘　　要：极化调整卷积(Polarization-Adjusted Convolutional,PAC)码的列表译码算法显示出优异的性能,但是仍然存在两个缺陷:①PAC码不具备错误检测能力不利于实际应用;②列表译码算法路径度量的大量累加导致正确译码路径被删除。针对这两个问题,在短PAC码上级联循环冗余校验(Cyclic Redundancy Check,CRC)码使其获得检错能力,结合移位修剪列表(Shifted-Pruning List,SPL)译码算法解决列表译码潜在的正确路径被删除的问题,并结合自适应列表方案,进一步降低CRC-PAC码的误码率。仿真结果表明,与传统的CRC辅助列表译码相比,所提出的自适应移位修剪列表(Adaptive Shifted-Pruning List,ASPL)译码可以实现更好的性能。The successive cancellation list decoding algorithm of Polarization-Adjusted Convolutional(PAC)code shows excellent performance but lacks error detection capability,which is not conducive to practical applications.To solve this problem,an algorithm combining Shifted-Pruning List(SPL)decoding and adaptive list scheme is proposed on the basis of short PAC code concatenated Cyclic Redundancy Check(CRC)code.The CRC-PAC code obtained by concatenating cyclic redundancy check code is equipped with error detection capability.The problem of deleting potentially correct paths for list decoding is addressed by a shift-pruning operation.This is combined with an adaptive list scheme to further reduce the BER of CRC-PAC codes.Simulation results show that the proposed Adaptive Shifted-Pruning List(ASPL)decoding can achieve better performance compared to the traditional CRC aided successive cancellation list decoding.

关 键 词：极化调整卷积码 极化码 循环冗余校验辅助 列表译码 移位修剪 

分 类 号：TN911.2[电子电信—通信与信息系统]