基于指向误差与不同噪声的星地激光通信系统误码性能分析  

Bit error performance analysis of satellite-ground laser communication system based on pointing error and different noise

作　　者：尹幸 姚海峰 刘智[1,4] 常亦迪 董科研[4] 陶小可 YIN Xing;YAO Haifeng;LIU Zhi;CHANG Yidi;DONG Keyan;TAO Xiaoke(School of Electronic and Information Engineering,Changchun University of Science and Technology,Changchun 130022,China;School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China;Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;NUERC of Space and Optoelectronics Technology,Changchun University of Science and Technology,Changchun 130022,China;PLA No.32215 Troop)

机构地区：[1]长春理工大学电子信息工程学院,长春130022 [2]北京理工大学光电学院,北京100081 [3]中国科学院长春光学精密机械与物理研究所,长春130033 [4]长春理工大学空间光电技术国家地方联合工程研究中心,长春130022 [5]中国人民解放军32215部队

出　　处：《光通信技术》2023年第3期31-36,共6页Optical Communication Technology

基　　金：国家自然科学基金项目(批准号:U2141231)资助;国家自然基金项目(批准号:62105029)资助;博士后站前项目(批准号:2021TQ0035)资助;博士后面上项目(批准号:2021TM700415)资助;应用光学国家重点实验室开放基金项目(批准号:SKLA02022001A11)资助。

摘　　要：为了研究在大气湍流、指向误差以及各种噪声的共同影响下的星地激光通信系统平均误码率性能,采用Gamma-Gamma信道模型,建立了大气湍流与指向误差的组合衰减模型,并结合各种噪声推导出关于组合衰减模型的星地激光通信系统平均误码率的闭合表达式。研究结果表明,当卫星轨道高度为400 km、天顶角为45°、波长为1550 nm以及等效波束半径和指向误差位移标准差(抖动)的归一化比值为4时,总噪声、热噪声、背景噪声对应的平均误码率分别为1.519×10^(-7)、6.907×10^(-8)、1.357×10^(-8)。In order to study the average bit error rate performance of satellite-ground laser communication system under the combined influence of atmospheric turbulence,pointing error and various noises.In this paper,a combined attenuation model of atmospheric turbulence and pointing error is established using the Gamma-Gamma channel model,and a closed expression for the average bit error rate of the satellite-ground laser communication system with respect to the combined attenuation model is derived by combining various noises.The research results show that when the satellite orbit altitude is 400 km,zenith angle is 45°,wavelength is 1550 nm and the normalized ratio of equivalent beam and the pointing error displacement standard deviation(jitter)is 4,the average bit error rates corresponding to total noise,thermal noise and background noise are 1.519×10^(-7)、6.907×10^(-8)、1.357×10^(-8) respectively.

关 键 词：星地激光通信 指向误差 各种噪声 Gamma-Gamma信道 平均误码率 相干光通信 

分 类 号：TN929.12[电子电信—通信与信息系统]