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    Active Tracking for Free-Space Optical Communication Systems
    2.
    发明申请
    Active Tracking for Free-Space Optical Communication Systems 审中-公开
    自由空间光通信系统的主动跟踪

    公开(公告)号：US20120308239A1

    公开(公告)日：2012-12-06

    申请号：US13486880

    申请日：2012-06-01

    申请人： Samir S. Sheth ,  Wayne E. Walters ,  John C. Wissel ,  Kelvin Hui Xu ,  Brian E. Royal ,  Kelly P. Hawkins

    发明人： Samir S. Sheth ,  Wayne E. Walters ,  John C. Wissel ,  Kelvin Hui Xu ,  Brian E. Royal ,  Kelly P. Hawkins

    IPC分类号： H04B10/10

    CPC分类号： H04B10/1125 ,  H04B10/118

    摘要： Systems and methods enabling nodes of a free-space optical communication system to maintain pointing alignment of their transmitted optical beams. A first node scans its optical antenna through a path centered on a target direction. The second node captures signal strength measurements during the scan, and sends those measurements to the first node. The first node separately measures signal strength of the optical signal being received from the second node. The two sources of information (locally measured and remotely measured) are used to compute angular errors. The first node uses the angular errors to adjust the target direction of its optical antenna. The second node may employ the same method (with roles reversed) to adjust its target direction. By cycling back and forth between to the two nodes, the target directions of the two nodes maintain alignment in spite of movements of the structures on which they are mounted.

    摘要翻译： 允许自由空间光通信系统的节点保持其发射光束的指向对准的系统和方法。 第一个节点通过以目标方向为中心的路径扫描其光学天线。 第二个节点捕获扫描期间的信号强度测量，并将这些测量值发送到第一个节点。 第一节点分别测量从第二节点接收的光信号的信号强度。 信息的两个来源（本地测量和远程测量）用于计算角度误差。 第一节点使用角度误差调整其光学天线的目标方向。 第二节点可以使用相同的方法（用角色颠倒）来调整其目标方向。 通过在两个节点之间来回循环，尽管它们被安装在其上的结构的移动，两个节点的目标方向保持对准。