光通信技术2025，Vol.49Issue(5)：27-33,7.DOI:10.13921/j.cnki.issn1002-5561.2025.05.005
子载波间插SCFDM技术在LED-FSO系统中的应用研究
Research on the application of interleaved-subcarrier SCFDM technology in LED-FSO system
摘要
Abstract
Aiming at the issue that light-emitting diode(LED)-based free-space optical(FSO)communication system are sus-ceptible to the nonlinear current-voltage characteristics of devices and atmospheric turbulence interference,a transmission scheme incorporating interleaved subcarrier single-carrier frequency-division multiplexing(I-SCFDM)technology is proposed.The low peak-to-average power ratio(PAPR)characteristic of I-SCFDM signals is analyzed,and the performance differences among the I-SCFDM scheme,DC-biased optical orthogonal frequency-division multiplexing(DCO-OFDM)scheme,and local-ized SCFDM(L-SCFDM)scheme are compared.Simulation results show that under additive white Gaussian noise(AWGN)channels,the I-SCFDM scheme achieves significant signal-to-noise ratio(SNR)gain compared to traditional optical OFDM(O-OFDM)schemes.Under atmospheric turbulence channels,the I-SCFDM scheme combined with equal-gain combining(EGC)technology requires only the minimum diversity order to meet the 20 dB SNR threshold requirement,outperforming traditional O-OFDM schemes.关键词
自由空间光通信/发光二极管/正交频分复用/子载波间插-单载波频分复用Key words
free-space optical communication/light-emitting diode/orthogonal frequency division multiplexing/interleaved-subcarrier single-carrier frequency division multiplexing分类
信息技术与安全科学引用本文复制引用
杜子豪,敖学渊,陈俊杰,陈梓健,赵建,陈军帆..子载波间插SCFDM技术在LED-FSO系统中的应用研究[J].光通信技术,2025,49(5):27-33,7.基金项目
国家自然科学基金项目(U23A20282)资助 （U23A20282）
广东省"珠江人才计划"青年拔尖人才项目(2019QN01X165)资助 （2019QN01X165）
广东省自然科学基金项目(2024A1515010384)资助. （2024A1515010384）
