基于增益反馈控制的水下移动光通信技术研究  

Research on Underwater Mobile Optical Communication Technology based on Gain Feedback Control

作　　者：刘杰徽 马麟[1] 朱森荣 何祖源 LIU Jie-hui;MA Lin;ZHU Sen-rong;HE Zu-yuan(State Key Laboratory of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University,Shanghai 200240,China;Chongqing Qianwei Technologies Group Co.,Ltd.,Chongqing 401121,China)

机构地区：[1]上海交通大学,区域光纤通信网与新型光通信系统国家重点实验室,上海200240 [2]重庆前卫科技集团有限公司,重庆401121

出　　处：《光通信研究》2023年第4期68-72,共5页Study on Optical Communications

基　　金：国家自然科学基金资助项目(62275150)。

摘　　要：在水下移动可见光通信系统中,当传输距离改变时,因水具有较大固有吸收,接收光功率会发生显著变化。文章提出了一种基于增益反馈控制(GFC)的水下移动可见光通信技术,拓展了通信距离和视场角(FOV)的动态范围。在移动速度为0.13 m/s条件下,实现了通信距离0.9~5.2 m任意可调速率5.0 Mbit/s、像素为800×600且帧率(FPS)不为零的实时双工视频传输。与没有使用GFC方法的系统相比,其通信距离和FOV的动态范围分别增长了5.3和2.8倍。为了进一步验证该系统的性能,文章还测试了不同移动速度下系统的平均闪烁指数、数据传输中断概率及误码率(BER)。在通信距离的动态范围内,随着移动速度增大,平均闪烁指数及BER相应增大,但即使移动速度达到系统可实现的最大速度0.83 m/s时,通信仍未中断,说明该系统具有良好的鲁棒性,在水下移动可见光通信领域具有良好的应用前景。In underwater mobile visible light communication systems,the received optical power varies significantly when the transmission distance changes due to the large intrinsic absorption of water.This paper proposes an underwater mobile visible light communication technology based on Gain Feedback Control(GFC),which expands the dynamic range of both communication distance and Field of View(FOV).At a moving speed of 0.13 m/s,we achieved real-time duplex video transmission with adjustable communication distances between 0.9~5.2 m,data rates of 5.0 Mbit/s,video pixels of 800×600,and Frames Per Second(FPS)greater than zero.Compared with the system without GFC,the dynamic range of communication distance and receiving FOV angle has expanded to 5.3 and 2.8 times,respectively.In order to further verify the performance of the system,we measured the average scintillation index,data transmission outage probability,and Bit Error Rate(BER)of the system at different moving speeds.Within the dynamic range of communication distance,as the moving speed increases,the average scintillation index and BER correspondingly increase.However,even when the moving speed reaches 0.83 m/s,which is the maximum speed of the system,communication remains uninterrupted.Our results indicate that the system has good robustness and has good potential underwater mobile communication applications.

关 键 词：可见光通信 移动通信 视频通信 动态范围 

分 类 号：TN929[电子电信—通信与信息系统]