软信息辅助硬判决译码在自由空间光通信中的应用

雷艺; 陈斌; 周红平; 郭凯; 郭忠义

doi:10.12263/DZXB.20210220

您当前的位置：

首页 >

文章列表页 >

软信息辅助硬判决译码在自由空间光通信中的应用

无线光通信及其组网技术 | 更新时间：2025-12-08

- 软信息辅助硬判决译码在自由空间光通信中的应用
- A Soft-Aided Hard-Decision Decoder for Free-Space Optical Communications
- 电子学报 2021年49卷第10期页码：1945-1951
- 作者机构：
  
  合肥工业大学计算机与信息学院，安徽合肥 230009
- 作者简介：
  
  [ "雷艺（通信作者）女，1990年生，重庆忠县人.合肥工业大学计算机与信息学院讲师.主要研究方向为光通信、信道编码等. E-mail:leiyi@hfut.edu.cn" ]
  [ "陈斌男，1989年生，安徽合肥人.合肥工业大学计算机与信息学院讲师.主要研究方向为新型编码调制技术." ]
- 基金信息：
  
  国家自然科学基金(62001151);安徽省自然科学基金(2008085QF282)
- DOI：10.12263/DZXB.20210220
  中图分类号： TN92;
- 收稿：2021-02-04，
  
  修回：2021-05-19，
  
  纸质出版：2021-10-25
- 稿件说明：
移动端阅览
雷艺,陈斌,周红平等.软信息辅助硬判决译码在自由空间光通信中的应用[J].电子学报,2021,49(10):1945-1951.

LEI Yi,CHEN Bin,ZHOU Hong-ping,et al.A Soft-Aided Hard-Decision Decoder for Free-Space Optical Communications[J].ACTA ELECTRONICA SINICA,2021,49(10):1945-1951.
雷艺,陈斌,周红平等.软信息辅助硬判决译码在自由空间光通信中的应用[J].电子学报,2021,49(10):1945-1951. DOI： 10.12263/DZXB.20210220.

LEI Yi,CHEN Bin,ZHOU Hong-ping,et al.A Soft-Aided Hard-Decision Decoder for Free-Space Optical Communications[J].ACTA ELECTRONICA SINICA,2021,49(10):1945-1951. DOI： 10.12263/DZXB.20210220.

摘要

由于在性能和复杂度之间的良好折中，软信息辅助硬判决译码近年来受到了光通信领域的高度关注，其中包括了软信息辅助比特标记（Soft-Aided Bit-Marking

SABM）算法.为了易于硬件实现，本文基于阶梯码（Staircase Code

SCC）提出了一种改进型SABM算法（improved SABM

iSABM），称为iSABM-SCC.iSABM-SCC利用信道软信息，通过两个可信度阈值将硬判决输出比特标记为三种可信度等级，用以辅助硬判决译码识别译码错误和扩展纠错能力，达到提升阶梯码性能的目的.在受大气湍流影响的自由空间光通信中的仿真表明，iSABM-SCC性能显著优于标准SCC和RS码.以强湍流信道为例，码率为0.75的iSABM-SCC在4-PAM调制下较标准SCC产生的性能增益可达4.37 dB，在8-PAM调制下较RS码产生的性能增益可达11.06 dB.

Abstract

Due to a good trade-off between performance and complexity

a new class of decoding schemes

called soft-aided hard-decision (SA-HD) decoders

has become particularly interesting to optical communication fields in recent years. Soft-aided bit-marking (SABM) algorithm is one of the popular ones. To be friendly for hardware implementation

this paper proposes an improved SABM (iSABM) algorithm for staircase codes (SCCs)

which we call iSABM-SCC. With the help of channel soft information

iSABM-SCC marks bits into three types according to their reliabilities using two thresholds. The marked information is then used to assist the staircase decoder to prevent miscorrections and to extend the error-correcting capability

thus improving the performance of SCCs. The simulation results for free-space optical communications show that the proposed iSABM-SCC scheme achieves higher performance gains over standard SCC (S-SCC) and RS code in turbulence channels. For instance

iSABM-SCC with code rate of 0.75 has been shown to yield up to 4.37 dB performance gain when compared to S-SCC for 4-PAM and up to 11.06 dB performance gain when compared to RS code for 8-PAM in a strong turbulence channel.

关键词

Keywords

references

陈纯毅 , 杨华民 , 姜会林 , 等 . 大气信道部分相干光通信链路性能分析与优化 [J]. 电子学报 , 2009 , 37 ( 8 ): 1869 － 1872 .

Chen C Y , Yang H M , Jiang H L , et al . Performance analysis and optimization of partially coherent optical communication links through atmospheric channel [J]. Acta Electronica Sinica , 2009 , 37 ( 8 ): 1869 － 1872 . (in Chinese)

邵军虎 , 柯煕政 , 陈强 . 一种适用于大气弱湍流信道的极化纠错编码调制方案 [J]. 电子学报 , 2016 , 44 ( 8 ): 1831 － 1836 .

Shao J H , Ke X Z , Chen Q . A suitable polar coding modulation scheme for atmospheric weak turbulence channel [J]. Acta Electronica Sinica , 2016 , 44 ( 8 ): 1831 － 1836 . (in Chinese) .

Smith B P , Farhood A , Hunt A , et al . Staircase codes: FEC for 100 Gb/s OTN [J]. Journal of Lightwave Technology , 2012 , 30 ( 1 ): 110 － 117 .

G . 709 . 2/Y.1331.2, OTU4 long-reach interface [S].

G . 709 . 3/Y.1331.3, Flexible OTN long-reach interfaces [S].

Optical Internetworking Forum , Implementation agreement 400 ZR[OL], OIF-400 ZR- 01.0_reduced2.pdf (oiforum.com) 2020 ， 5 .

Hager C , Pfister H D . Miscorrection-free decoding of staircase codes [A]. Proceedings of the 2017 European Conference on Optical Communication [C]. Gothenburg, Sweden : IEEE , 2017 . 1 － 3 .

Holzbaur L , Bartz H , Wachter-Zeh A . Improved decoding and error floor analysis of staircase codes [J]. Designs Codes and Cryptography , 2018 , 87 : 647 － 664 .

Wijekoon V B , Viterbo E , Hong Y . LDPC-staircase codes for soft decision decoding [A]. Proceedings of the 2020 IEEE Wireless Communications and Networking Conference [C]. Seoul, Korea (South) : IEEE , 2020 . 1 － 6 .

Condo C , Bioglio V , Land I . Staircase construction with nonsystematic polar codes [A]. Proceedings of the 2020 Optical Fiber Communications Conference and Exhibition [C]. San Diego, CA, USA : IEEE , 2020 . 1 － 3 .

Sheikh A , Amat A G I , Liva G . Binary message passing decoding of product-like codes [J]. IEEE Transactions on Communications , 2019 , 67 ( 12 ): 8167 － 8178 .

Sheikh A , Amat A G I , Alvarado A . Novel high-throughput decoding algorithm for product and staircase codes based on error-and erasure decoding [J]. Journal of Lightwave Technology , 2021 , Early Access: 1－ 1 .

Amat A G I . Liva G, Steiner F. Coding for optical communications－can we approach the Shannon limit with low complexity [A]. Proceedings of the 45th European Conference on Optical Communication [C]. Dublin, Ireland : IET , 2019 . 1 － 4 .

Lei Y , Alvarado A , Chen B , et al . Decoding staircase codes with marked bits [A]. Proceedings of the 2018 IEEE 10th International Symposium on Turbo Codes & Iterative Information Processing [C]. Hong Kong, China : IEEE , 2018 . 1 － 5 .

Lei Y , Chen B , Liga G , et al . Improved decoding of staircase codes: The soft-aided bit-marking (SABM) algorithm [J]. IEEE Transactions on Communications , 2019 , 67 ( 12 ): 8220 － 8232 .

柯熙政 , 田晓超 . 二维相关K分布湍流信道的建模与仿真 [J]. 光学学报 , 2015 , 35 ( 4 ): 41 － 49 .

Ke X Z , Tian X C . Modeling and simulation of Bi-dimensional correlated K-distributed turbulent channel [J]. Acta Optica Sinica , 2015 , 35 ( 4 ): 41 － 49 . (in Chinese)

McEliece R J , Swanson L . On the decoder error probability for Reed-Solomon codes [J]. IEEE Transaction on Information Theory , 1986 , 32 ( 5 ): 701 － 703 .

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

一种基于OAM的FSO误码性能的理论分析方法

一种自由空间光通信中自适应光电阵列信号处理算法