恶劣环境下大气信道激光通信传输特性研究

针对大气激光通信在复杂环境下的衰减比较严重,已有的大气衰减模型存在计算误差大的问题,研究了激光大气传输效应,分析大气通信信道特性。根据雨雾共存环境特性,修正已有的大气衰减模型,给出适用于复杂环境下的大气衰减计算模型。利用大气衰减模型,仿真分析无线光通信系统的链路余量。结果表明,计算链路余量时,采用已有的计算模型误差较大,采用修正的计算模型误差较小。

Study on Transmission Characteristics of Atmospheric Channel Laser Communication in Severe Environment

As atmospheric laser communication is attenuated severely in complex environment, it is necessary to design a new atmospheric attenuation calculation model. This paper firstly studied the atmospheric transmission effect as well as the characteristics of atmospheric channel. Then, it amended the existing calculation model for the environment in which rain and fog coexisted. Finally, the model was used to calculate the link margin in wireless laser communication system. The results show that the amended model has less error in calculation than the exist one.