大气信道中空间光通信的性能预算  

Performance Budget of Space Optical Communication in Atmospheric Channel

作　　者：刘大畅 曾晶 孙石峰 谢寅亮 吴绍华 Liu Dachang;Zeng Jing;Sun Shifeng;Xie Yinliang;Wu Shaohua(Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China;Guangdong Southern Planning&Designing Institute of Telecom Co.,Ltd.,Shenzhen 518038,China)

机构地区：[1]哈尔滨工业大学(深圳),广东深圳518055 [2]广东南方电信规划咨询设计院有限公司,广东深圳518038 [3]广东南方电信规划咨询设计院有限公司咨询院,广东深圳518038 [4]哈尔滨工业大学(深圳)通信工程研究中心,广东深圳518055

出　　处：《邮电设计技术》2020年第10期63-67,共5页Designing Techniques of Posts and Telecommunications

摘　　要：针对应用于大气信道的空间光通信系统,首先介绍了5种常见传输光的类型及特性。然后根据推导的光束尺寸和相前曲率半径表达式,模拟了发射光束尺寸为2 cm的1550 nm激光束,在不同相干性状态下接收端光束传输扩散特性经3 km传输后的变化趋势。最后针对整体链路推导了链路余量和链路可靠性表达式,为空间光通信系统选择最佳光束类型、系统设计参数以及链路预算分析提供理论依据。Firstly,for space optical communication system applied in atmospheric channel,the types and characteristics of five kinds of common transmission light are introduced.Then according to the deduced expressions of beam size and phase front radius of curvature,the propagation and diffusion characteristics of 1550 nm laser beam with a beam size of 2 cm at the receiving end after 3 km transmission are simulated under different coherence conditions.Finally,the expressions of link margin and link reliability for whole communication link are derived.It provides a theoretical basis for selecting the best beam type,system design parameters and link budget analysis of space optical communication system.

关 键 词：空间光通信 大气信道 激光特性 链路预算 

分 类 号：TN929.5[电子电信—通信与信息系统]