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针对紫外光大气传输理论和非直视单散射模型,分析了大气信道对紫外光通信的影响,并在不同参数条件下,对大气信道所产生的时间延迟进行了定量仿真。仿真结果表明:时间延迟随通信距离的增加而迅速增大,通信距离增加1km,时间延迟增加约2倍;时间延迟随发射和接收仰角的增加而增加,且发射仰角对时间延迟的影响大于接收仰角;时间延迟随发射束散角和接收视场角的增加而减小。因此,为减小通信系统的时间延迟,在紫外光通信系统设计时,应尽量减小系统的发射仰角和接收仰角,增加系统的发射束散角和接收视场角。
According to the atmospheric transmission theory of ultraviolet light and the single-scattering model of non-direct-view, the influence of atmospheric channel on ultraviolet communication is analyzed, and the time delay of atmospheric channel is simulated under different parameters. The simulation results show that the time delay increases rapidly with the increase of communication distance, the communication distance increases by 1km, and the time delay increases by about 2 times. The time delay increases with the elevation of transmitting and receiving angles, and the elevation angle of elevation affects the time delay more than the receiving Elevation angle; the time delay decreases with the increase of beam angle and receiving angle of view. Therefore, in order to reduce the time delay of the communication system, it is necessary to minimize the launch elevation angle and the receiving elevation angle of the system in the design of the ultraviolet communication system, and increase the system launch beam angle and the reception field angle.