面向PC-Polar码的一种软输出PC-SCANF译码算法  

A Soft-output PC-SCAN F Decoding Algorithm for PC-Polar Code

作　　者：时诚 吴晓富[1] 蒋政颢 胡海峰[1] SHI Cheng;WU Xiaofu;JIANG Zhenghao;HU Haifeng(Nanjing University of Posts and Telecommunications,Nanjing Jiangsu 210003,China)

机构地区：[1]南京邮电大学,江苏南京210003

出　　处：《通信技术》2024年第12期1247-1253,共7页Communications Technology

基　　金：国家自然科学基金(62371245)。

摘　　要：针对奇偶校验极化(Parity-Check Polar,PC-Polar)码的软输出译码需求,基于PCPolar码中信息比特和奇偶校验比特之间的一般约束关系,给出了一种通用的奇偶校验软抵消(Parity-Check Soft Cancelation,PC-SCAN)译码算法。在此基础上,提出了一种基于信道接收样本翻转的奇偶校验软抵消翻转(Parity-Check Soft Cancelation Flip,PC-SCANF)译码算法,该译码算法通过奇偶校验关系的错误检测机制对信道接收样本中的低可靠位置进行翻转尝试,反复实施多次PC-SCAN译码,直至奇偶校验满足或者达到最大翻转次数。仿真结果表明,在(128,64)PC-Polar码及块错误率(Block Error Rate,BLER)=1e-5的条件下,所提出的PC-SCANF算法性能相比于PC-SCAN算法提升了0.6 dB。To address the soft-output decoding requirements of PC-Polar(Parity-Check Polar)codes,a general PC-SCAN(Parity-Check Soft Cancellation)decoding algorithm is proposed by leveraging any constraints between information bits and parity-check bits.On this basis,a PC-SCANF(Parity-Check Soft Cancelation Flip)decoding algorithm with selective sign-flipping of the received samples is proposed.The decoding algorithm attempts to do sign-flipping for the received samples at a number of unreliable positions within PC constraints,and repeatedly performs PC-SCAN decoding until all the PC constraints are satisfied or the maximum number of flips is achieved.Simulation results indicate that for a(128,64)PC-Polar codes under BLER(Block Error Rate)=1e-5,the proposed PC-SCANF algorithm achieves a 0.6 dB performance improvement compared to the PC-SCAN algorithm.

关 键 词：极化码 预编码极化码 软抵消算法 翻转算法 

分 类 号：TN91[电子电信—通信与信息系统]