摘要
文章提出采用GPS(全球定位系统)坐标解算和蜂窝螺旋扫描来实现空间光通信ATP(捕获、跟踪和对准)系统初始捕获的方法。首先由通信两端的GPS坐标计算出光学天线的方位角和俯仰角,光学天线根据计算的角度值大致对准信标光的方向,从而缩小了信标光捕获的不确定区域。然后在不确定区域内执行蜂窝螺旋扫描,从而将信标光引入粗跟踪CCD(电荷耦合元件)的视场内,实现初始捕获。通过地面捕获实验验证了上述方法的有效性。
This paper proposes an initial beacon acquisition method for Free Space Optical（FSO） communications ATP systems on the basis of GPS coordinate calculation and cellular spiral scanning algorithm.It first calculates the azimuth angle and pitch angle of the optical antenna on the basis of the GPS coordinates of both terminals and the antenna rotates accordingly and points to the beacon light approximately so as to minimize the uncertain acquisition regions.Then it scans the regions and leads the beacon light into the coarse tracking Charge-coupled Device（CCD） field of view,realizing the initial acquisition.Ground beacon acquiring experiments verify the effectiveness of this method.
出处
《光通信研究》
北大核心
2012年第2期67-70,共4页
Study on Optical Communications
基金
湖北省教育厅科学技术研究项目(Q20092301)
湖北省自然科学基金资助项目(2009CDB343)
