非直视紫外光通信单次散射传输模型研究

依据Lambert定律建立了非直视紫外光通信系统单次散射传输模型。模型表明:大气传输中的两次斜向传输引入的大气透射比衰减,大气散射衰减和距离平方反比衰减是导致接收光功率随距离增加迅速衰减的主要因素。为便于实际计算,对建立的散射传输模型做了合理的计算简化,经实验验证简化后的传输模型计算结果与实验结果吻合较好。利用简化后的传输模型可以方便有效地计算出非直视紫外光通信接收机在不同距离下的接收功率和路径传输损耗,进而可以迅速、有效地计算和评估已知参数的非直视紫外光通信系统的极限工作距离。

Study of single scatter model in NLOS UV communication

Based on Lambert law,a single scatter model about NLOS ultraviolet communication system of intensity modulate/direct detection was set up.According to the transmission model,atmospheric transmission attenuation,atmospheric scattering attenuation and inverse ration of square distance attenuation are the three main factors leading to the power attenuation with the distance increase.In order to put the model into in practice,the model was simplified.Tested by the experiment outdoors,the calculation based on the model accords with the data acquired from experiment quite well.The simplified model could calculate power received by the receiver in different distance and transmission loss efficiently,which gives effective way to budget and evaluate the transmission distance of NLOS ultraviolet communication systems in solar-blind.