无线光通信中雨滴末速度对散射光频谱的影响研究  

Research on the influence of the raindrop terminal velocity on the spectrum of scattered light in wireless optical communication

作　　者：徐林[1] 黄富良 解孟其 王鹏[3] 王琛[1] XU Lin;HUANG Fuliang;XIE Mengqi;WANG Peng;WANG Chen(The 34th Research Institute of CETC,Guilin Guangxi 541004,China;91388 Troops,Zhanjiang Guangdong,China;School of Electronic and Information Engineering,Xi'an Technological University,Xi'an 710021,China)

机构地区：[1]中国电子科技集团公司第三十四研究所,广西桂林541004 [2]91388部队,广东湛江 [3]西安工业大学电子信息工程学院,西安710021

出　　处：《光通信技术》2024年第6期6-10,共5页Optical Communication Technology

基　　金：陕西省教育厅科研自然专项(20JK0679)资助。

摘　　要：为了探究大气扰动对无线光通信(WOC)系统性能的影响,采用了Mie散射模型深入分析了雨中散射光的衰减情况。求解了雨滴末速度起伏的相关函数,随后应用维纳-辛钦定理计算出散射光的功率谱,并创造性地提出了将Marshall-Palmer分布与多种雨滴末速度模型相结合的方法,以此揭示雨滴末速度对散射光频谱的具体影响。仿真结果表明:在相同的雨滴末速度分布条件下,随着降雨率的增加,4种雨滴末速度模型的散射光频谱的衰减也随之增大,但频谱的形状基本保持不变;532 nm波长的信号光衰减约比1550 nm波长的信号光大1 dB。In order to explore the impact of atmospheric disturbances on the performance of wireless optical communication(WOC)systems,the Mie scattering model is used to deeply analyze the attenuation of scattered light in rain.First,the correlation function of the raindrop terminal velocity fluctuations is solved,and then the Wiener-Khinchin theorem is applied to calculate the power spectrum of the scattered light.A method combining Marshall-Palmer distribution with multiple raindrop terminal velocity models is creatively proposed to reveal the specific impact of raindrop terminal velocity on the received light intensity spectrum.The simulation results show that,under the same distribution of raindrop terminal velocity,as the rainfall rate increases,the attenuation of the scattered light spectrum of the four raindrop terminal velocity models also increases,but the shape of the spectrum remains basically unchanged,the attenuation of the beacon light with a wavelength of 532 nm is about 1 dB more than that of the signal light with a wavelength of 1550 nm.

关 键 词：无线光通信 米氏散射 雨滴谱 末速度 雨衰 

分 类 号：TN929.12[电子电信—通信与信息系统]