飞行物体对微波链路遮挡效应的角谱法分析(邀请)

Angular spectrum analysis of the diffraction effect of microwave links by flying objects(Invited)

利用包括低轨卫星星座及同步轨道卫星等无线通信空中平台所发出的微波信号,提出一种基于飞行物体对微波的遮挡效应进行飞行物体监测的方法。如何定量分析遮挡效应是这种新方法需要解决的一个关键问题。由于微波衍射和光衍射本质上是相同的,提出利用光学分析的方法来解决这一问题。通过将整个微波链路系统用一个简化的光学系统来描述,用角谱法计算并分析了飞行物体相对于微波传播路线的移动速度、飞行物体高度等参数对接收机接收的微波强度的影响,为进一步研究这种新的监测方法奠定了基础。

Based on the obstruction effect of flying objects to microwave communication links of sky or space borne platforms,e.g.low earth orbit satellites or geosynchronous orbit satellite,a framework of detection,identification and tracking of flying objects is proposed with the opportunistic use of the microwave signals from the platforms.As microwave signals and optical signals have the same diffraction principle,a simplified optical model is proposed and optical analysis is applied to quantitatively characterize the obstruction effect,which is a key issue in the proposed method.In particular,with angular spectrum analysis,the impact of various parameters including the speed and the height of the flying objects on the microwave intensity at the ground receiver is analysed,paving the way for further research into the proposed detection,identification and tracking method for flying objects.