湍流环境中多口径发射空间激光通信系统误码率分析  

Bit error rate analysis of multiple apertures transmitting space laser communication system in turbulent environment

作　　者：郭振锋 刘波[1,2,3] 张昊 刘海锋 林炜[1,2,3] 姚远 陆泽辉[1,2] GUO Zhenfeng;LIU Bo;ZHANG Hao;LIU Haifeng;LIN Wei;YAO Yuan;LU Zehui(College of Electronic Information and Optical Engineering,Nankai University,Tianjin 300350,China;Institute of Modern Optics,Nankai University,Tianjin 300350,China;Southern Marine Science and Engineering Guangzhou Laboratory(Zhuhai),Zhuhai Guangdong 519000,China)

机构地区：[1]南开大学电子信息与光学工程学院,天津300350 [2]南开大学现代光学研究所,天津300350 [3]南方海洋科学与工程广东省实验室(珠海),广东珠海519000

出　　处：《光通信技术》2022年第4期11-16,共6页Optical Communication Technology

基　　金：国家自然科学基金重大科研仪器研制项目(2018YFB 1802302,61727815)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：为提高多口径发射的自由空间光通信系统性能,以“海洋高速通信网络关键技术研究与验证”项目为背景,提出了平均误码率(BER)的解析表达式。通信系统采用典型的强度调制直接探测(IMDD),工作在由指数威布尔(EW)分布模型描述的湍流环境中。分析了系统在不同信道参数下的孔径平均效应,以及不同发射口径数和通信速率对平均BER的影响。仿真结果表明:低通信速率下多口径发射系统具有良好的湍流抑制能力,高通信速率下不同发射口径的到达时间差会增加通信系统的误码概率。In order to improve the performance of free space optical communication system with multiple apertures transmitting,based on the"Research and verification of key technologies of marine high speed communication network"project,an analytical expression of bit error rate(BER)is proposed.The communication system uses intensity-modulation with direct-detection(IMDD)and works in a turbulent environment described by exponentiated Weibull(EW)distribution model.The aperture averaging effect under different channel parameters and the impacts on the average BER with different transmitting aperture numbers and communication rates are analyzed.The simulation results show that the multiple apertures transmitting system has good turbulence suppression ability at low communication rate.The difference of arrival time caused by different transmitting apertures will increase the bit error probability of the communication system at high communication rate.

关 键 词：自由空间光通信 大气湍流 多口径发射 指数威布尔分布模型 

分 类 号：TN914[电子电信—通信与信息系统]