自由空间光通信APT系统信标探测技术  

Beacon Detection Technology of APT System in Free Space Optical Communications

作　　者：单风华[1] 佟首峰[1] 吕春雷[1] 

机构地区：[1]长春理工大学光电工程学院,长春130022

出　　处：《长春理工大学学报（自然科学版）》2013年第3期53-55,59,共4页Journal of Changchun University of Science and Technology(Natural Science Edition)

摘　　要：在介绍了自由空间光通信和APT系统的工作原理的基础上,侧重对APT粗、精信标探测单元的分辨率、灵敏度和帧频等性能进行详细分析。粗信标探测单元具有较大视场和较低帧频,重点研究CCD相机的各种噪声、背景光和光学系统对于接收单元信噪比和捕获概率的影响;精跟踪接收单元具有较小的视场、高的检测精度和高帧频特性,重点考虑高帧频CCD相机和高速实时图像处理的具体实现方法,最后对光通信APT信标探测单元常用的两种方法进行性能分析并对应用范围进行归纳和综合。In this paper the working principle of free-space optical communications and APT system are introduced,and the detailed analysis on performance of coarse（CBDU）and fine beacon detection units（FBDU）,such as resolution,sensitivity,and frame rate is focused on.The CBDU has a large field of view and a low frame rate.Effects of various kinds of noise,background light,optical system of the CCD camera on SNR and acquisition probability of the receiving unit are studied.FBDU has a small field of view,but a very high detection precision and excellent frame rate characteristics.Implementations of high frame rate CCD camera,high-speed and real-time image processing are mainly discussed.Finally,performance and application range of the two APT beacon detection units are summarized.

关 键 词：自由空间激光通信 捕获 对准和跟踪 复合轴 信标 电荷耦合器件 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]