不均匀大气烟雾信道的空地光通信性能及上下行链路差异分析  

Performance Evaluation and Uplink/Downlink Differences of Air-Ground Optical Communications in Non-Uniform Atmospheric Smoke Channels

作　　者：王金博 高士明[2,3] 刘智[4] 宋鸿飞[1] 董科研[1] Wang Jinbo;Gao Shiming;Liu Zhi;Song Hongfei;Dong Keyan(School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022,Jilin,China;Centre for Optical and Electromagnetic Research,State Key Laboratory of Extreme Photonics and Instrumentation,Zhejiang University,Hangzhou 310058,Zhejiang,China;Ningbo Innovation Center,Zhejiang University,Ningbo 315100,Zhejiang,China;National and Local Joint Engineering Research Center of Space Optoelectronic Technology,Changchun University of Science and Technology,Changchun 130022,Jilin,China)

机构地区：[1]长春理工大学光电工程学院,吉林长春130022 [2]浙江大学极端光学技术与仪器全国重点实验室光及电磁波研究中心,浙江杭州310058 [3]浙江大学宁波科创中心(宁波校区),浙江宁波315100 [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,吉林长春130022

出　　处：《激光与光电子学进展》2024年第23期125-131,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(U2141231,62375239);浙江省自然科学基金(LDT23F04015F05);国家自然科学基金青年基金(62105042)。

摘　　要：针对伴有烟雾的不均匀大气环境,建立了空地光通信的综合信道模型,并采用离散化的分层高度模型分析了上行链路与下行链路通信之间的差异。实验结果表明,高度分层达到六层以后可获得稳定的仿真性能。在不均匀大气烟雾环境下,光信号穿过近地面烟雾会使通信质量明显降低,并且下行链路受到的影响比上行链路更大。整体来说,上行链路的性能优于下行链路。接收孔径的增大对上行链路的性能改善比下行链路更为显著,接收孔径每增大0.1 m,误码率降低一个数量级。而对于下行链路,接收孔径的增大反而会降低链路的通信性能。天顶角的增大会使得上行和下行链路的通信性能均降低。该研究结果可以为空地激光通信提供理论参考。A comprehensive channel model for air ground optical communication is established for an uneven atmospheric environment with smoke and fog,and a discrete layered height model is used to analyze the differences between uplink and downlink communication.Experimental results indicate that a stable simulation can be achieved after reaching six layers of high layering.In an uneven atmospheric smoke and fog environment,optical signs passing through smoke near the ground can significantly reduce communication quality,in which the effect on the downlink is greater than that on the uplink.In general,the performance of the uplink is superior to that of the downlink.An increase in the receiving aperture affects the performance improvement of the uplink more significantly than that of the downlink.As the receiving diameter increases by 0.1 m,the bit error rate decreases by an order of magnitude.Increasing the receiving aperture degrades the communication performance of the downlink.Meanwhile,increasing the zenith angle deteriorates the communication performance of both the uplink and downlink.The results of this study can provide theoretical reference for air ground laser communication.

关 键 词：不均匀大气 烟雾 空地光通信 上行和下行链路 

分 类 号：TN929.12[电子电信—通信与信息系统]