论文部分内容阅读
利用大气对光的散射作用可以实现非视线通信.在单次散射假定下,研究了非视线光散射通信系统的大气传输模型.利用该模型分析了光源发散角、接收视场和收发仰角等系统几何参数与接收散射光能量之间的关系;重点讨论了大气分子散射和气溶胶散射各自对接收散射光能量的贡献.结果表明当系统的收发仰角较大时,接收光能量主要来自大气分子散射;反之,气溶胶散射则成为接收光能量的主要部分.对于工作在日盲紫外光谱区的非视线通信系统,增加接收视场可以有效地增大系统的信噪比.发现在两种典型的收发仰角情况下,接收散射光能量随光源发散角的变化趋势是相反的,这说明光源发散角要根据实际的应用场合设计确定.
Non-line-of-sight communication can be achieved by the scattering of light in the atmosphere.According to the single scattering assumption, the atmospheric transmission model of non-line-of-sight light scattering communication system is studied.The system of the light source divergence angle, receiving field of view, The relationship between the geometrical parameters and the energy of the received scattered light is discussed.The contributions of atmospheric molecular scattering and aerosol scattering to the energy of the received scattered light are discussed respectively.The results show that the energy of the received light mainly comes from the scattering of the atmospheric molecule when the system has larger transmitting and receiving angles, On the contrary, aerosol scattering becomes the main part of the received light energy.For the non-line-of-sight communication systems operating in the solar-blind UV region, increasing the received field of view can effectively increase the signal to noise ratio of the system.It is found that in two typical transceivers Under the condition of elevation, the variation of the energy of the received scattered light with the divergence angle of the light source is the opposite, indicating that the divergence angle of the light source should be designed and determined according to the actual application.