Outside Source Target Positioning Method Based On Gps Exploratory Study

In modern warfare,radar plays a very important role.With the development of modern science and technology,the appearance of stealth aircraft,cruise missiles, anti-radiation missiles,electromagnetic interference threats active radars more and more.Modern radar must have a low intercept,anti-jamming and powerful detection capability to adapt to the complex electromagnetic environment of battlefield in modern warfare.Traditional radar is not easy to detect stealth targets and vulnerable to be attacked by anti-radiation weapons.Therefore,it becomes increasingly important to improve the anti-stealth and viability capabilities.Passive radar system positions and tracks air targets by measuring the direction angle and time difference of arrival of third-party radiation signal and the echo signal reflected by the target.In this dissertation,several major external radiation source localization algorithms have been studied,the contents are as follows:(1) This dissertation analyzes the positioning models of measured cross algorithm in two-dimensional plane and three-dimensional space,and simulates these algorithm by Matlab.Finally,the author analyzes a variety of factors that affect the positioning accuracy.(2) We analyze spatial orientation model and positioning accuracy of measured TDOA location algorithm,then we propose the factors that affect the positioning accuracy.At the end of this chapter,run Matlab to simulate the impact of various factors on the positioning accuracy.(3) The author analyzes the joint measurement of direction and time difference of arrival algorithm based on the GPS signal, and studies the positioning model of the algorithm and analyze the positioning accuracy.It simulates two factors which have impact on the positioning accuracy through Matlab.(4) At the end of this dissertation,the author comparatively analyzes the three kinds of positioning algorithms and summarizes the development trends of the passive radar.