摘要
基于概率分析理论,通过模仿光子在大气中发生散射时的随机迁移路径和方向,得到各阶散射路径损耗的理论表达式。通过模型仿真,得到不同阶次散射对总的接收信号能量的影响,给出了在指定发送、接收仰角等参数情况下预测的链路损耗值,并分别给出了接收信号中经历一阶、二阶、三阶散射的光子能量随通信距离的变化关系;通过蒙特卡罗仿真分析,发现在给定参数条件下,四阶及以上阶次散射对总的接收信号能量的贡献已十分微弱(相差10个量级以上),因此基本可以不考虑四阶及以上阶次散射对总的接收信号能量的影响。
The theoretic expressions of migrations of photons in free space. The loss in different scattering orders predicted path loss under different compared with relevant literature to validate preferences, high orders of scattering （higher are analysed by imitating random elevation angles are presented and it. It can be concluded from the simulation than four orders） contribute little to the total optical signal （at least 10 orders of magnitude smaller）, and thus the effects caused by the 4th scattering can be neglected. that under specific energy of received or higher orders of
出处
《激光与光电子学进展》
CSCD
北大核心
2011年第7期46-51,共6页
Laser & Optoelectronics Progress
基金
解放军理工大学预先研究基金(2009TX02)资助课题
关键词
大气光学
多次散射
相函数
路径损耗
atmospheric optics
multiple scattering
phase function
path loss
