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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。
The impact of weather on the light scattering transmission has good practical significance. Single-scattering models are currently used to study the non-line-of-sight optical transmission channel characteristics, but the error is large when the weather conditions are poor or the transmission distance is far. Monte Carlo method is used to simulate the non-line-of-sight optical transmission based on multiple scattering and to simulate light scattering transmission under different weather conditions (clear, cloudy, rain and fog). The results show that the atmospheric attenuation plays a leading role in the long-distance and long-range scattering transmission, and the quality of the signal transmission decreases in turn from clear, cloudy, rain and fog. The effect of the weather on the light-scattering transmission is affected by the combination of atmospheric attenuation and scattering in the near-distance scattering transmission Smaller. Therefore, atmospheric light-scattering transmission technology can be used as a new way to realize all-weather communication under short distance conditions.