基于极化码的广播信道传输性能分析  

Analysis of Broadcast Channel Transmission Performance Based on Polar Code

作　　者：刘志城 李树锋[2] 蔡铭宇 谭钰 Liu Zhicheng;Li Shufeng;Cai Mingyu;Tan Yu(Guangdong South New Media Co.,Ltd,Guangdong 510699,China;Communication University of China,Beijing 100024,China)

机构地区：[1]广东南方新媒体股份有限公司,广东510699 [2]中国传媒大学,北京100024

出　　处：《广播与电视技术》2021年第8期116-121,共6页Radio & TV Broadcast Engineering

基　　金：国家自然科学基金青年项目(61601414);中央高校基本科研业务费专项资金(CUC19B067)资助。

摘　　要：目前,数字广播电视的研究重点之一是传输高质量的信号。信道编码是保证信息可靠传输的关键技术,尤其是极化码在近些年受到了越来越多的关注。本文首先讨论了极化码的信道可靠性估计方法,并给出了一种基于蒙特卡洛模拟的极化码编码方法。其次研究了SC译码和CA-SCL译码算法。结果显示,CA-SCL算法比SC算法的译码性能有明显的提高,高斯近似算法大幅改善了极化码的编译码性能,而基于蒙特卡洛模拟的极化码在模拟次数较大时误码性能更优。Nowadays it is one of research focuses of digital broadcasting and TV to transmit high-quality signals.Channel coding is key technology to ensure reliable information transmission.Polar codes,in particular,have attracted more and more attention in recent years.In this paper,channel reliability estimation method of polar codes is discussed,and a polar coding method based on Monte-Carlo simulation is given.Moreover,SC decoding and CA-SCL decoding are investigated.Simulation results show that decoding performance of CA-SCL algorithm is better than that of SC algorithm.Gaussian approximation algorithm greatly improves encoding and decoding performance of polar codes.The performance of polar codes based on Monte-Carlo simulation is better when simulation times are large.

关 键 词：数字广播电视 极化码 蒙特卡洛模拟 SC算法 CA-SCL算法 

分 类 号：TN918.3[电子电信—通信与信息系统]