大气弱湍流下星地光链路衰落特性影响因素分析  

Influencing factors on fading characteristic of satellite-to-ground optical communication link in weak atmospheric turbulence

作　　者：姜晓峰[1] 赵尚弘[1] 侯睿[1] 王翔[1] 李勇军[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《应用光学》2012年第3期629-633,共5页Journal of Applied Optics

基　　金：全军军事学研究生课题(2010JY0820-492)

摘　　要：研究了弱湍流条件下星地光通信链路的衰落概率、平均衰落次数以及平均衰落时间3个重要参数的统计特性,并通过数值仿真分析了链路天顶角、光波长以及接收机海拔高度对链路衰落特性的影响。结果表明:减小天顶角和提高接收机探测灵敏度可以改善链路的衰落特性;1.55μm激光较0.85μm、1.06μm激光更适合于星地光通信;地面接收机应尽量建在2 000m以上的高海拔地区。The statistical characteristic of the three important factors which are fading probability,mean fading number and mean fading time of satellite-to-ground optical communication link subject to weak atmospheric turbulence is researched,and the influence of zenith angle,light wavelength and altitude of receiver on the satellite-to-ground laser link is analyzed by numeric simulation.The result of research shows either decreasing the zenith angle or increasing the detection sensitivity of receiver can improve the fading characteristic of laser link;the 1.55 μm laser is more suitable for satellite-to-ground optical communication than 0.85 μm and 1.06 μm;the receiver should be established in the region with altitude higher than 2 000 m.

关 键 词：大气弱湍流 星地光通信 衰落 天顶角 光波长 接收机海拔高度 

分 类 号：TN929.12[电子电信—通信与信息系统]