非视距大气散射光通信最优化链路分析与设计  

Optimization of Link Analysis and Design for Long-Range Non-Line-of-Sight Atmospheric Scattering Communication

作　　者：宋超[1] 徐智勇[1] 汪井源[1] 韦毅梅[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《中国激光》2012年第9期196-203,共8页Chinese Journal of Lasers

基　　金：解放军理工大学预先研究基金(2009TX02);江苏省科技支撑计划(BE2011177)资助课题

摘　　要：提出平均散射相函数,更为准确地反映了云滴粒子的角散射强度分布特性;基于概率论和随机迁移理论,以马尔可夫数据链的形式建立多次散射随机分析模型,借助蒙特卡罗仿真得到给定通信几何构架下的非视距大气光散射链路路径损耗特性;针对大气链路中有无云存在两种实际,从大气气溶胶散射和云散射两个方面分析非视距大气光散射链路的最优化通信构架设计;通过模型仿真结果与实地实验数据的对比验证了分析的合理性。结论与波长相关,实验及仿真均采用808nm波长的激光二极管(LD)作为光源。The average scattering phase function is proposed, to present the angular scattering properties of cloud droplets more accurately than Henyey-Greenstein （H-G） phase function, The theoretically multiple scattering model is founded in the form of Markov chains, which is based on probabilistic theory and stochastically migrating theory, The characteristics of path loss under given communication configurations are obtained by Monte Carlo simulation algorithm. The best communication configurations for non-light-of-sight （NLOS） atmospheric aerosols scattering and cloud-droplets scattering are analyzed, considering whether there are clouds suspending in the atmosphere. The rationality of analysis is validated by the consistency between experimental data and simulation results. The conclusions referred in this paper are wavelength-dependent, and laser diode （LD） with wavelength 808 nm is chosen as the source light of experiment and simulation.

关 键 词：大气光学 非视距链路 气溶胶散射 云散射 相函数 蒙特卡罗仿真 路径损耗 

分 类 号：TN929.12[电子电信—通信与信息系统]