雾环境下非视距散射光通信最佳链路分析  

Optimization of link analysis for non-line-of-sight atmospheric scattering communication in fog weather

作　　者：林勇[1] 徐智勇[1] 汪井源[1] 宋超[1] 王荣[1] 耿常锁[2] 

机构地区：[1]解放军理工大学通信工程学院光电与量子信息技术教研室 [2]中国人民解放军61932部队

出　　处：《红外与激光工程》2015年第2期705-710,共6页Infrared and Laser Engineering

基　　金：江苏省科技支撑计划(BE2011177);江苏省自然科学基金(BK2011114);江苏省自然科学基金(BK2012509);"区域光纤通信网与新型光通信系统国家重点实验室"开放基金(2013GZKF031304)

摘　　要：基于概率论和随机迁移理论,建立多次散射随机模型,采用蒙特卡洛方法仿真分析了辐射雾条件下,不同的通信距离条件时,近红外信号光在大气传输信道中传输的路径损耗与能见度之间的关系,指出在给定的通信距离以及给定的系统发送端发送仰角和发送光束束散角,接收端接收仰角和接收视场角等几何参数下,会存在一个能见度使得在这个能见度条件下信号光传输的损耗最小。在通信距离、能见度给定的情况下,针对大气散射通信几何构架中的各个参数的改变都会对非视距大气散射光通信链路路径损耗产生影响,通过模型仿真,提出辐射雾环境下最优化通信链路几何构架。仿真中采取808 nm波长的激光二极管(LD)作为光源。The theoretically multiple scattering model was based on probabilistic theory and stochastically migrating theory. The relationship between transmission loss and visibility was analyzed in different communication distance in radiation fog weather with Monte Carlo simulation. The results demonstrate that there is a visibility that can makes transmission loss lower when the communication range, the elevation angle, the transmitting beam-width divergence and the field-of-view（FOV） are determined.Various parameters of schematic diagram of the atmosphere laser scattering communication geometric framework can affect transmission loss of link for non-line-of-sight atmospheric scattering communication when the communication range and the visibility are determined and an optimized link for non-line-ofsight atmospheric scattering communication was put forward through the model simulation. Laser Diode（LD） with wavelength 808 nm was chosen as the source light of simulation.

关 键 词：大气光学 非视距链路 蒙特卡洛 路径损耗 能见度 

分 类 号：TN929.12[电子电信—通信与信息系统]