湍流环境下组阵收发的深空激光通信系统性能  

Performance of deep space laser communication system with array transceiver in turbulent environment

作　　者：李晓龙 蔡岳丰 闫宝罗 李昌瑾 刘海锋[1,2] 林炜 刘波[1,2] 吴继旋 LI Xiaolong;CAI Yuefeng;YAN Baoluo;LI Changjin;LIU Haifeng;LIN Wei;LIU Bo;WU Jixuan(Institute of Modern Optics,Nankai University,Tianjin 300350,China;Southern Marine Science and Engineering Guangdong Laboratory,Zhuhai Guangdong 519000,China;College of Electronic and Information Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]南开大学现代光学研究所,天津300350 [2]南方海洋科学与工程广东省实验室,广东珠海519000 [3]天津工业大学电子与信息工程学院,天津300387

出　　处：《光通信技术》2020年第10期20-23,共4页Optical Communication Technology

基　　金：国家重点研发计划项目(2018YFB1802302)资助;国家自然科学基金(NSFC 11904180)资助;天津市高层次创新创业团队项目资助;南开大学自制实验教学仪器设备项目资助。

摘　　要：为了探究大气湍流对深空激光通信的影响,从理论上讨论了Gamma-Gamma分布的大气信道模型和抑制大气湍流的手段。建立了基于组阵收发的深空激光通信系统模型,对不同湍流条件下的系统误码率进行仿真。仿真结果表明:在信噪比为20 dB时,弱湍流环境的下行链路通信误码率比强湍流低4个数量级;大气湍流强度增强时,系统的通信误码率增大;在同等湍流强度下,大气湍流对于上行链路通信性能的影响比下行链路更大。In order to explore the effect of atmospheric turbulence on deep-space laser communication,the Gamma-Gamma distributed atmospheric channel model and means to suppress atmospheric turbulence are theoretically discussed.A deep space laser system model based on array transceiver is introduced,and the system's bit error rate under different turbulence conditions is simulated.The results show that when the signal-to-noise ratio is 20 dB,the downlink communication bit error rate under weak turbulence is 4 orders of magnitude lower than that under strong turbulence.When the intensity of atmospheric turbulence increases,the bit error rate of the system increases.At the same turbulence intensity,the influence of atmospheric turbulence on uplink communication performance is greater than that on downlink.

关 键 词：深空环境 空间激光通信 大气湍流 组阵收发 误码率 

分 类 号：TN929.12[电子电信—通信与信息系统]