光通信研究Issue(2)：40-45,6.DOI:10.13756/j.gtxyj.2025.240054
可见光通信中多级PLDPC与迭代译码设计
Design of Multilevel PLDPC and Iterative Decoding in Visible Light Communications
摘要
Abstract
[Objective]In order to effectively improve the transmission rate of Visible Light Communication(VLC)system and reduce the Bit Error Rate(BER)of the communication system,a multilevel Protograph Low-density Parity-check Codes(PLD-PC)and iterative decoding design scheme is proposed.[Methods]First,the multilevel PLDPC code and modulation constella-tion structure in the VLC system based on Color Shift Keying(CSK)are thoroughly investigated,and a multilevel PLDPC-CSK transmission scheme is designed.Secondly,based on the perceived color constraints,the method of transmitting consecutive sym-bol sequences is introduced,and the CSK mapping scheme that minimizes the number of symbol sequences at the minimum Eu-clidean distance is proposed.Finally,a multi-level iterative soft decoding scheme is designed based on the multi-level PLD-PC-CSK transmission system.[Results]The simulation results show that at the data rates of R=2 and 3 bits/symbol,the multi-level PLDPC-CSK design scheme for symbol sequences proposed in this paper has a performance gain of about 1.8 and 4.5 dB,respectively,compared with the standard and other same-rate CSK constellation structures.[Conclusion]In summary,the BER performance of the design scheme of the paper is significantly better than that of the comparison scheme,which improves the reli-ability of data transmission and optimizes the system performance of VLC.关键词
可见光通信/原模图低密度奇偶校验码/符号序列/多级迭代软译码Key words
VLC/PLDPC/symbol sequence/multilevel iterative soft decoding分类
电子信息工程引用本文复制引用
李宗艳,雷小茜,高寒,李世银..可见光通信中多级PLDPC与迭代译码设计[J].光通信研究,2025,(2):40-45,6.基金项目
国家自然科学基金资助项目(61976169) （61976169）
广西无线宽带通信与信号处理重点实验室资助项目(GXKL06230204) （GXKL06230204）
