市内建筑物间无线光通信粗跟踪模拟实验研究

Experiment study for coarse tracking simulation in free-space optical communication between buildings in cities

针对空间无线光通信中捕获、瞄准和跟踪(ATP)技术的粗跟踪系统对信标光斑实时准确跟踪需求,搭建了地面建筑建筑物间无线光通信粗跟踪二维模拟实验系统,分别进行了微弱机动和不同速度下的非机动模拟跟踪实验,采用简易有效的跟踪性能评价方法分析了实验结果。实验表明:非机动状态下的X轴跟踪误差随着模拟目标运动速度增大而增大,Y轴误差略小X轴,但对模拟目标运动呈无规律性;机动状态的跟踪误差略大于非机动状态;实验中多次出现的误差尖峰可能与粗大值有关。

In order to track the beacon facular accurately and in real time for coarse tracking system in free-space optical communication and make ready for further lake platform communication, an experiment system for coarse tracking system simulation in free-space optical communication between buildings is established. Further tracking simulations are done with no maneuvering in different speeds and with weak maneuverings,respectively. The experiment results are analyzed through a simple and effective e- valuation method. It is shown that the tracking error of X-axis increases with the increase of simulation speed,but has no order for Y-axis under no maneuvering simulation. The X-axis error is a little bigger than that of Y-axis with no maneuvering simulations and both errors for X- and Y-axis are a little smaller than those under weak maneuvering. Furthermore, the abnormal tracking error may be caused by the wild value.