Research On Dual-station Cooperative Anti-jamming Technology

This paper studies the cooperative anti-jamming technology of bistatic-radar,and analyzes the methods of using the ground radar and missile borne radar to counter th e active jamming in the process of missile tracking.The main work of this paper is as follows:he typical active jamming is modeled and simulated.The mathematical models and jamming working principles of different jamming types are analyzed,and various active jamming are simulated with MATLAB.According to the trajectory of missile and target,the radar signal processing process is simulated in detail,including echo pulse pressure processing,MTD,CFAR,single pulse angle measurement and fuzzy processing.Finally,space registration and time registration processing are carried out for the detection data of ground radar and missile borne radar.Then,the countermeasure methods of active jamming are studied,and the methods of anti deception jamming by waveform agility and anti suppression jamming by pseudo-random phase and linear frequency combined are analyzed.The simulation results show that the above methods have good jamming suppression effect.The anti-jamming method based on the synergy of bistatic radar is studied.When there is only one radar encountering stand-off jamming,a method of distinguishing stand-off jamming and self-defense jamming by angle difference is proposed.This method classifies jamming types by calculating Mahalanobis distance between angle information of bistatic radars.Simulation results verify the effectiveness of this method.A method of calculating waveform similarity is proposed to distinguish noise jamming and deception jamming.In this method,jamming signal error angle(JSEA)distribution of echo jamming signal of ground radar and missile borne radar under different jamming is calculated,and then it is distinguished according to the actual calculation results.In this paper,the JSEA is simulated in detail,and the interference judgment method is given.In this paper,a method of cross location and self-defense interference suppression is proposed by using the information of angle measurement of two stations.The location calculation method is deduced in detail,and the positioning accuracy is simulated and analyzed.