光通信研究Issue(3)：134-139,6.DOI:10.13756/j.gtxyj.2024.230058
自由空间光通信中极化码的应用研究
Research on Application of Polar Codes in Free Space Optical Communication
摘要
Abstract
[Objective]In Free Space Optical(FSO)communication,atmospheric turbulence can cause a decrease in communica-tion link performance.[Methods]In this paper,a polar coding channel coding scheme is proposed for this problem,and Monte Carlo algorithm is used to construct polar codes for Gamma-Gamma distribution atmospheric turbulence channels commonly used in FSO communication.By comparing the Block Error Rates(BER)of the proposed polar coding scheme,uncoded transmission,and Low Density Parity Check(LDPC)codes with similar code lengths under Gamma-Gamma distribution atmospheric turbu-lence channels.[Results]The simulation results show that when the Signal-to-Noise Ratio(SNR)is greater than 6.7 dB in weak turbulence,10.3 dB in moderate turbulence,and 11.5 dB in strong turbulence,the proposed polar coding scheme performs better than uncoded transmission.Compared with LDPC codes,under weak turbulence conditions,when the SNR is greater than 7.1 dB,the overall performance of the proposed polar coding scheme is better than that of LDPC codes.Under moderate turbulence condi-tions,when the SNR is greater than 10.6 dB,the overall performance of the proposed polar coding scheme is better than that of LDPC codes.Under strong turbulence conditions,when the SNR is greater than 12 dB,the overall performance of the proposed polar coding scheme is better than that of LDPC codes.In addition,it is found that when the code length is short,the code rate is low,and the decoding width is small,the proposed polar coding scheme has better performance.[Conclusion]The use of the pro-posed polar coding scheme effectively improves the atmospheric turbulence effect in FSO communication systems.Moreover,in the harsh atmospheric turbulence channel environment of moderate and high turbulence intensities,the proposed polar coding scheme exhibits more obvious advantages than LDPC codes.This indicates that polar codes have good development prospects in FSO communication.关键词
信道编码/自由空间光通信/极化码/Gamma-Gamma分布Key words
channel coding/FSO communication/polar codes/Gamma-Gamma distribution分类
信息技术与安全科学引用本文复制引用
邢莉娟,李卓,王卓..自由空间光通信中极化码的应用研究[J].光通信研究,2024,(3):134-139,6.基金项目
国家自然科学基金资助项目(61372072) （61372072）
111工程基金资助项目(B08038) （B08038）
