摘要
天气对光散射传输影响分析具有很好的实践指导意义。目前均用单次散射模型研究非视线光传输信道特性,但该方法在天气条件差或者传输距离较远时误差很大。利用蒙特卡罗方法进行了基于多次散射的非视线光传输模拟,对多种天气条件下(晴、阴、雨和雾等)不同距离光散射传输进行仿真。结果表明,中远距离散射传输时,大气衰减起主导作用,信号传输质量由晴、阴、雨、雾依次降低;近距离散射传输时,受到大气衰减和散射的共同作用,天气对光散射传输的影响较小。因此,大气光散射传输技术可作为短距离条件下实现全天候通信的一种新方式。
It is important for designing and evaluating the UV communication system to study on the optical scattering propagation. At present, the single-scattering theory is always used to study the NLDS light propagation, but when it is used for complicated weather or long distance light propagation simulation, large error will occur. The NLOS light propagation simulation based on multiple scattering is described. The result of light propagation is simulated in .some kinds of weather （ clearness, overcast, rainfall, fog and so on）. The primary factor is the atmosphere attenuation and the signal reduced to a lower quality from clearness to fog in medium range. However, both atmosphere attenuation and atmosphere scattering have an effect on the propagation when it is short range, but the effect varied from weather is available. Therefore, the atmosphere light scattering propagation can be used as a new technique of all-weather short-range eommunication links.
出处
《光学技术》
CAS
CSCD
北大核心
2009年第1期56-59,共4页
Optical Technique
基金
国家自然科学基金资助项目(60607013)
关键词
信息光学
非视线传输
多次散射
天气
全天候
information optics
non-line-of-sight propagation
multiple scattering
weather
all-weather
