一种5G系统自适应快速SCL极化码译码算法  

Adaptive Fast Successive Cancellation List Decoding Algorithm of Polar Codes in 5G System

作　　者：汪晓雅 席兵[2] 高锦盟 邓炳光[1] WANG Xiaoya;XI Bing;GAO Jinmeng;DENG Bingguang(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;School of Photo-Electronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]重庆邮电大学光电工程学院,重庆400065

出　　处：《无线电工程》2022年第5期807-813,共7页Radio Engineering

基　　金：重庆市重大主题专项(cstc2019jscx-zdztzxX0002)。

摘　　要：针对5G系统控制信道的极化码译码性能问题,基于快速串行抵消列表(Fast Successive Cancellation List,FSCL)译码算法,提出了一种自适应快速串行抵消列表(Adaptive FSCL,AD-FSCL)译码算法。该算法能够降低译码复杂度,设置列表初始值,对极化码的4种特殊节点进行相应的快速译码,并且自适应地增加列表值,直到译码成功或列表值达到最大值时,算法结束。仿真结果表明,该算法能够降低译码复杂度且块误码率(Block Error Rate,BLER)性能几乎没有损失。To address the high decoding complexity of polar codes in 5G system control channel,an adaptive fast decoding algorithm based on Fast Successive Cancellation List(FSCL)decoding algorithm is proposed,which can reduce the decoding complexity.The algorithm sets the initial value of the list for fast decoding of four special nodes of polar codes,and adaptively increases the list value.The algorithm comes to an end when the decoding is successful or the list value reaches the maximum.The simulation result shows that the algorithm can reduce the decoding complexity,and has little loss of block error rate performance.

关 键 词：极化码 快速译码 自适应译码 串行抵消列表译码 

分 类 号：TN929.5[电子电信—通信与信息系统]