低能见度下紫外光非直视传输模型研究

为了克服紫外光通信中单散射模型在低能见度下的适用局限性，基于一阶多次散射理论，对Luegtten非直视单散射信道模型进行修正。在原模型的建模基础上，修正模型考虑了大气分子的瑞利散射和气溶胶的米氏散射，并且引入了多次散射的影响，运用Matlab对修正模型进行了仿真。结果表明，在低能见度下修正模型比原模型在信道模拟上有较大改进，数据与试验结果吻合得更好；由于一阶多次散射理论适用于多次散射小于单次散射但又不能忽略的情况，修正模型与实际情况存在一定的差距。这对低能见度下的紫外光通信试验提供了参考数据。

Study on Ultraviolet NLOS Propagation Model in Low Visibility

In order to overcome the applicable limitation of single-scattering propagation model in UV communication in low visibility, non-line-of-sight (NLOS) single-scattering propagation model proposed by Luegtten was improved based on 1st order multi-scattering theory. In the amended model, the Rayleigh scattering of atmosphere molecule and the Mie scattering of aerosol were involved, the effect of multi-scattering was taken into account and it was simulated with Matlab. The results show that compared with former model, the amended one accords with experiment results better in low visibility, and that due to the applicable limitation of 1st order multi-scattering theory, the amended model differs from actual fact to a certain extent. It could provide reference for UV communication experiments in low visibility.