星地光通信地面站空间分集技术研究  

Ground station's space diversity technology for satellite-to-ground optical communication

作　　者：姜晓峰[1] 赵尚弘[1] 李勇军[1] 侯睿[1] 王翔[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1期229-232,174,共5页Journal of Applied Optics

基　　金：全军军事学研究生课题(2010JY0820-492)

摘　　要：通过建立星地光链路模型对地面站空间分集技术中站址的选择、站址间距离以及地面站数量进行研究,结果表明:站址的合理选择可以提高星地链路的可用性;站址间的距离在保证各站天气不相关的同时不能过大,当站址间距离与卫星高度的比值达到1时,由链路天顶角增大带来的衰减高达10dB以上;单地面站的可用性越高,所需的地面站数也越少,当单站的可用性达到0.6时,只需3个地面站即可达到与射频链路相当的高可用性。The choice of station＇s address, interval and number of stations in ground station＇s space diversity technology is investigated by modeling optical link for satellite-to-ground optical communication. The result of research shows, reasonable choice of station＇s address can improve the availability of satellite-to-ground optical communication link; the interval of stations should ensure the weathers at different stations are uncorretated but not too long; the attenuation resulted from zenith angle is more than 10 dB when the ratio of interval and altitude of satellite is larger than 1; the necessary amount of stations is smaller if the availability of single ground station is higher; only 3 stations are needed with equivalent availability of microwave link when the availability of single station is 0. 6.

关 键 词：星地光通信 链路可用性 地面站空间分集 

分 类 号：TN929.1[电子电信—通信与信息系统]