基于Sahu-Shanmugam和Fournier-Forand体积散射函数的水下激光传输特性分析  

Characteristic Analysis of Underwater Laser Propagation Based on Sahu-Shanmugam and Fournier-Forand Volume Scattering Functions

作　　者：李天松[1,2] 高翔 周晓燕 阳荣凯 Li Tiansong;Gao Xiang;Zhou Xiaoyan;Yang Rongkai(Institute of Information and Communication,Guilin Universit if of Electronic Technology,Guilin,Guangxi,541004,China;Guayigxi Key Laboratory of Precision Navigation Technology and Application,Guilin,Guangxi,541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004 [2]广西精密导航技术与应用重点实验室,广西桂林541004

出　　处：《激光与光电子学进展》2020年第3期58-66,共9页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61561014);广西精密导航技术与应用重点实验室基金(DH201709);桂林电子科技大学研究生科技创新项目(2018YJCX36)。

摘　　要：结合Sahu-Shanmugam和Fournier-Forand体积散射函数,使用蒙特卡罗方法建立水下激光传输信道模型,利用该模型分析了接收端的光束扩展特性。研究了三种典型水域下,接收视场角和接收面直径对光束功率密度的影响,以及不同接收距离下光束功率密度的分布特性。结果表明:随着水域散射系数的增大和传输距离的增加,会加剧光束分布扩展;随着接收面直径的增大,光束功率密度的变化趋势逐渐减小,光束功率密度幅值随着接收视场角的增大而增加;随着传输距离的增加,光束功率密度分布逐渐离散。这些结果为水下定位或水下接收机等设计提供参考。Combined with Sahu-Shanmugam and Fournier-Forand volume scattering functions,a simulated model of underwater laser transmission channel is built with Monte Carlo method,and the model is used to analyze the beam extension characteristics at the receiving end.The effects of received field of view and the diameter of receiver on the power density of the beam,and the distribution characteristics of beam power density under different receiving distances are studied under three typical waters.The results show:with the increase of scattering coefficient in the water area and the increase of transmission distance,the beam distribution expansion is intensified;with the increase of diameter of receiving surface,the variation trend of the beam power density decreases gradually,and the amplitude of the beam power density increases as the increasing receiving field angle;with the increase of transmission distance,the distribution of beam power density becomes more discrete.The results provide a reference for underwater positioning or underwater receiver design.

关 键 词：海洋光学 体积散射函数 蒙特卡罗法 海洋信道 光子统计 

分 类 号：TN929.1[电子电信—通信与信息系统]