深空激光通信终端主要参数的分析与研究  

Research on Main Parameters of Deep Space Laser Communication Terminal

作　　者：陈功轩 张伟[1,2] 叶晖 刘阳[1] 王海鹏[2] CHEN Gongxuan;ZHANG Wei;YE Hui;LIU Yang;WANG Haipeng(Shanghai Institute of Satellite Engineering,Shanghai 201100,China;Deep Space Exploration Laboratory,Hefei 230000,China)

机构地区：[1]上海卫星工程研究所,上海201100 [2]深空探测实验室,合肥230000

出　　处：《遥测遥控》2024年第4期66-74,共9页Journal of Telemetry,Tracking and Command

摘　　要：针对深空激光通信的应用环境和特性,分析了通信链路中的关键性能指标,考虑了距离光斑扩散衰减、指向控制精度衰减、大气衰减、太阳辐射、探测器暗电流噪声等因素后,确定了通信速率和通信误码率的具体计算方法。对通信链路进行建模,分析了各个参数的计算方法;通过公式推导分析了发射端望远镜口径(激光束散角)与指向控制精度对最大通信距离的影响,以数值仿真进行佐证并进一步分析了发射端望远镜口径(激光束散角)与指向控制精度的约束关系,提出了深空激光通信参数设计的方法。在此基础上进一步计算了现有激光通信能力在地月空间、地火空间场景下的激光链路性能。According to the application environment of deep space laser communication,this paper analyzes the key performance indicators in the communication link.After taking into account factors such as distance spot diffusion attenuation,pointing control accuracy attenuation,atmospheric attenuation,solar radiation,detector dark current noise etc.,this paper determines the specific calculation method of communication rate and communication bit error rate.Through formula derivation,the impact of the transmitter telescope diameter(laser beam divergence angle)and pointing control accuracy on the maximum communication distance is analyzed,and numerical simulation is used to support and further analyze the constraint relationships between transmitter telescope diameter(laser beam divergence angle)and pointing control accuracy and proposed design methods for the design of deep space laser communication links.The performance of laser links in the scenarios of earth-moon space and earth-Mars space under the existing laser communication capabilities is further calculated.

关 键 词：深空激光通信 激光束散角 指向控制精度 链路性能 

分 类 号：TN927[电子电信—通信与信息系统]