天空背景光对空间激光通信系统的影响  

Influence of Sky Background Light on Space Laser Communication System

作　　者：范新坤[1,2] 张磊[1] 佟首峰[1] 宋延嵩[1] 江伦[1] 

机构地区：[1]长春理工大学空间光电技术研究所,吉林长春130022 [2]长春理工大学空地激光通信技术国防重点学科实验室,吉林长春130022

出　　处：《激光与光电子学进展》2017年第7期96-104,共9页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(91438204)

摘　　要：为了分析天空背景光对空间激光通信系统的影响情况,同时为通信链路总体方案的设计提供相应的参考数据,建立了天空背景光噪声模型并进行理论分析和仿真研究。仿真结果表明:天空背景光会引起粗、精跟踪单元所使用探测器的信噪比下降,导致跟踪精度降低,增加了通信系统的误码率。根据系统的性能指标,合理地选择通信波长,采用小口径、窄带宽的光学系统,并选择最优的天顶角和通信时段,可有效降低天空背景光对系统性能的影响,以满足通信链路的任务要求。In order to analyze the influence of sky background light on a space laser communication system and provide corresponding reference data for total design of communication links at the same time, a sky background light noise model is established and analyzed theoretically. Simulation results show that the sky background light causes the decrease of signal to noise ratio of the detector used in the coarse and fine tracking units, and then leads to the decrease of tracking precision and the increase of bit error rate of the communication system. According to the performance index of the system, the influence of sky background light on the system performance is effectively reduced to meet the requirements of the mission of the communication link when we choose the communication wavelength properly, use an optical system with minor-caliber and narrow bandwidth, and select the optimal zenith angle and communication time.

关 键 词：光通信 背景光 建模 仿真 信噪比 

分 类 号：TN929.1[电子电信—通信与信息系统]