大气信道对空-地光通信的影响分析

Analysis of Effects of Atmospheric Channel on Space-to-Ground Optic Communication

大气随机信道对激光传输性能的影响是制约空-地激光通信的重要因素之一,因此开展对大气信道的研究对实现空-地激光通信具有非常重要的意义。对激光在大气中传输特性的研究,有助于了解激光通过大气信道传输时所产生变化的特征、规律和在空-地激光通信系统设计中寻找到合理的解决方案并很好地修正、补偿其对通信链路的影响。本文对激光在大气信道中的基本传输特性及大气随机信道对激光通信的影响进行了研究,同时提出了一些相应的解决途径。

One of the important factors which affect spacetoground optical communications is that the atmospheric channel has random characteristics.Atmospheric turbulence corrupts both the amplitude and phase of an propagating optical field and causes degradations in the performance of atmospheric links. Atmospheric attenuation effect absorbs the laser energy when laser beam propagates in spacetoground links.In this paper,it is not only described and researched of the laser property while it transmits through atmosphere but also offered some methods to solve some key problems that will occurred when laser transmits through atmosphere.All this can help us to understand spacetoground optical communications thoroughly and make the system design perfectly.