自由空间激光通信系统的粗跟踪特性分析  

Analysis of rough tracking characteristics of free space laser communication system

作　　者：李文娟 陈艳 LI Wenjuan;CHEN Yan(College of Mobile Telecommunications,Chongqing University of Posts and Telecommunication,Chongqing 401520,China)

机构地区：[1]重庆邮电大学移通学院,重庆401520

出　　处：《激光杂志》2020年第5期158-162,共5页Laser Journal

基　　金：国家科技基金项目(No.5000365245)。

摘　　要：针对传统自由空间激光通信系统硬件设计信号控制幅度调整范围小,串口通信单一化,导致粗跟踪精准度、存在干扰的问题。提出自由空间激光通信系统的粗跟踪特性分析。将线阵CCD作为跟踪控制系统的传感器设计了系统的主控采集模块,利用发送接收模块中的光驱动电路和光电检测电路实现信息的接收和发送,设计了滤波器模块滤除通信过程中存在的噪声。在软件设计中将Windows CE控制系统应用到主控计算机中,通过事件驱动方式和多线程同步技术同时处理多个通信串口中存在的数据,利用指向算法完成对准操作,实现自由空间激光系统的跟踪控制系统的设计。实验结果表明,所提方法设计的系统对尺度变化的目标跟踪效果良好,具有较强抗干扰效果。Aiming at the hardware design of traditional free space laser communication system,the control range is small and the serial communication is single,which leads to low accuracy and interference of rough tracking and the problems.The rough tracking characteristics of free space laser communication system are analyzed.The linear CCD is used as sensor of tracking control system to design the main control acquisition module.The optical drive circuit and photoelectric detection circuit in sending and receiving module are used to receive and transmit chaotic confidential information.The filter module is designed to filter the noise existing in communication process.In the software design,the Windows CE control system is applied to main control computer,the data existing in multiple communication serial ports are processed simultaneously by event-driven mode and multi-thread synchronization technology,and the alignment operation is completed by using pointing algorithm to realize the design of tracking control system of the free space laser system.The experimental results show that the system designed by the method has good target tracking effect on the scale change,and has a strong anti-interference effect.

关 键 词：自由空间 激光通信 粗跟踪特性 

分 类 号：TN929.1[电子电信—通信与信息系统]