光通信研究Issue(3)：11-17,7.DOI:10.13756/j.gtxyj.2024.230122
基于SLIPT的水下自供电光通信系统设计
Design of Underwater Optical Communication System based on Simultaneous Light-wave Information and Power Transmission
摘要
Abstract
[Objective]Replenishing the power supply system of an underwater communication system is usually very expensive and impractical.The underwater Simultaneous Light-wave Information and Power Transmission(SLIPT)communication sys-tems based on solar cells are powerful solutions.However,the communication bandwidth of the silicon solar cell receiver is very limited,and it is easy to have the phenomenon of deep fading of the Signal-to-Noise Ratio(SNR)due to the underwater light at-tenuation effect.[Methods]For these problems,this manuscript employs a negative-biased solar cell light receiver scheme that in-creases the-3 dB bandwidth of silicon solar cells from 420 kHz to 768 kHz.Aiming at the deep fading of SNR caused by various degradation effects in the water environment,a Discrete Fourier Transfor(DFT)extended Orthogonal Frequency Division Multi-plexing(OFDM)modulation scheme with a low peak-average power ratio is adopted to offset the deep fading phenomenon in the system.[Results]The performance of DFT Spread OFDM(DFT-S-OFDM)and OFDM modulation systems in water environ-ments with different turbidity(absorption and scattering characteristics)is compared.It is shown that the DFT-S-OFDM modu-lation and demodulation system is more robust.[Conclusion]Finally,experiments have shown that the total battery power effi-ciency of the energy harvesting system can be increased by 1.87 times under continuous illumination of white LEDs for 3 h,realiz-ing synchronized energy harvesting in the communication process.关键词
水下无线光通信/同步光波信息和功率传输/光伏负偏压/离散傅里叶变换扩展正交频分复用Key words
underwater wireless optical communication/SLIPT/photovoltaic negative bias/DFT-S-OFDM分类
物理学引用本文复制引用
张丽娟,夏艳,赵茜,李丹丹..基于SLIPT的水下自供电光通信系统设计[J].光通信研究,2024,(3):11-17,7.基金项目
广州华商学院青年学术基金资助项目(2021HSQS52) （2021HSQS52）
