Accurate beacon positioning method for satellite-to-ground optical communication.
Accurate beacon positioning method for satellite-to-ground optical communication.
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DOI：
10.1364/oe.25.030996
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发表时间：
2017-12
期刊：
影响因子：
3.8
通讯作者：
Qiang Wang;Ling Tong;Siyuan Yu;L. Tan;Jing Ma
中科院分区：
文献类型：
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作者：
Qiang Wang;Ling Tong;Siyuan Yu;L. Tan;Jing Ma
在卫星激光通信系统中，准确定位信标是建立稳定激光通信链路的关键。在星地光通信中，影响信标捕获的主要因素是背景噪声和大气湍流。本文考虑星地光通信中背景噪声和大气湍流对信标的影响，提出了一种新的信标定位算法，该算法以图像数据曲线拟合得到的相关系数作为权重。通过远程激光通信实验（11.16 km），验证了该方法的可行性。仿真和实验结果表明，该算法能准确地获得信标质心的位置。此外，对于大气湍流造成的光斑畸变，新算法的定位精度比传统的灰度质心算法提高50%。这种新方法将有利于星地光通信系统的设计。
In satellite laser communication systems, accurate positioning of the beacon is essential for establishing a steady laser communication link. For satellite-to-ground optical communication, the main influencing factors on the acquisition of the beacon are background noise and atmospheric turbulence. In this paper, we consider the influence of background noise and atmospheric turbulence on the beacon in satellite-to-ground optical communication, and propose a new locating algorithm for the beacon, which takes the correlation coefficient obtained by curve fitting for image data as weights. By performing a long distance laser communication experiment (11.16 km), we verified the feasibility of this method. Both simulation and experiment showed that the new algorithm can accurately obtain the position of the centroid of beacon. Furthermore, for the distortion of the light spot through atmospheric turbulence, the locating accuracy of the new algorithm was 50% higher than that of the conventional gray centroid algorithm. This new approach will be beneficial for the design of satellite-to ground optical communication systems.