中国激光, 2011, 38 (5): 0505005, 网络出版: 2012-09-06   

大气激光通信中稳定跟踪器件及算法研究

Study on Stabilizational Tracking Technology for Atmospheric Laser Communication System
作者单位
长春理工大学电子信息工程学院, 吉林 长春 130022
摘要
在大气激光通信中捕获对准跟踪(APT)是通信成功的前提。对空间激光通信中的捕获对准跟踪系统常用的两种光束定位探测器件CCD和四象限光电探测器(QD)的特性进行了深入分析,研究了影响大气激光通信跟踪系统性能的5种大气湍流效应,分别讨论了光束漂移、光强起伏、光斑弥散、到达角起伏及光束扩展的原理及对应仿真结果。结合大气湍流和探测器,针对质心跟踪算法和形心跟踪算法进行深入分析,得到并实验验证了在大气条件下形心算法的跟踪误差小于质心误差的结论。
Abstract
Acquisition pointing tracking (APT) is the precondition for communications in atmospheric laser communication system. CCD and quadrant detector (QD) which used in APT are deeply studied for their characteristics, and five kinds of turbulence effects such as beam wander, intensity fluctuations, dispersed spot, angle of arrival fluctuation and beam spreading for tracking precision and their mathematical models are discussed. Then, simulation results of turbulence effects under various conditions are analyzed. Both theoretical analysis and experimental results show that tracking error of shape center capturing algorithms is less than that of centroid localization algorithm which combines five kinds of turbulence effects.
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刘云清, 姜会林, 佟首峰. 大气激光通信中稳定跟踪器件及算法研究[J]. 中国激光, 2011, 38(5): 0505005. Liu Yunqing, Jiang Huilin, Tong Shoufeng. Study on Stabilizational Tracking Technology for Atmospheric Laser Communication System[J]. Chinese Journal of Lasers, 2011, 38(5): 0505005.

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