摘要
针对卫星光通信系统的无信标光捕获中信号光束散角小、捕获难度大的问题,提出在光通信终端的捕获、跟踪和瞄准子系统中采用超前瞄准镜作为扫描执行机构进行扫描捕获。对捕获过程中的各个因素进行了理论建模,特别对步进扫描和连续扫描两种捕获模式分别进行了分析,并对不确定区域进行了优化设计以减小捕获时间。
In beaconless acquisition of satellite optical communication, beam divergence angle of communication laser is small and it is hard to acquire the optical communication terminal. Therefore, the point ahead fine steering mirror in pointing, acquisition and tracking subsystem is used to scan the field of uncertainty to acquire the optical communication terminal. Firstly, a variety of factors which affect acquisition are modeled theoretically. Especially, two acquisition mode, including parallel processing acquisition mode and serial processing acquisition mode, are analyzed separately, and the field of uncertainty is optimized to reduce acquisition time.
出处
《光通信技术》
北大核心
2015年第6期53-56,共4页
Optical Communication Technology
关键词
星间光通信
无信标光捕获
扫描
捕获时间
inter-satellite optical communications, beacon-less acquisition, scan, acquisition time
