基于超短波超视距外辐射源的目标定位实现分析

Analysis of Passive Radar Positioning Based on Ultrashort Wave Over-the-horizon Radiation Source

阐述了超短波超视距无源侦察系统的工作机理,分析了利用超视距辐射源信号形成视距或超视距目标定位的典型模式,探讨了定位系统工程实现的主要挑战和解决措施。文中推导了目标反射超视距辐射源能量的表达式,论述了辐射源特性和选用依据,并以无线电视和雷达为典型外辐射源分析了目标定位范围。仿真分析表明,利用超视距辐射源,可检测辐射源周边、辐射源与侦察系统视距交汇区域及周边的空中目标,从而有效扩展被动定位范围,形成超视距跟踪和预警能力。

In this paper,the principle of ultrashort wave over-the-horizon(OTH)passive reconnaissance system is described.The typical modes of using OTH radiation sources for target positioning within or over the horizon range are analyzed.The main challenges and solutions for target positioning system implementation are discussed.The expressions of the reflected energy of OTH radiation sources are derived.After introducing the characteristics of the radiation source and the basis for selection,the target positioning ranges are analyzed by taking radio-TV and radar as typical radiation sources.The simulation shows that the effective positioning range of using OTH radiation sources is around the radiation source,and in the area where the sights of the radiation source and the reconnaissance system meet.It can effectively expand the passive positioning range and form OTH tracking and early warning capabilities.