| Radar confrontation is an important branch of electronic information confrontation.Radar interference and radar anti-jamming are the relationship between spear and shield.The development of one party is bound to promote the development of the other party.Radar is often equipped with anti-aircraft missile radar seeker,and the missile's precision guidance has a very important significance.The pulse Doppler radar is a kind of total co herent system radar,through the radar and the relative motion between the target generated Doppler frequency to obtain the target speed information,according to the arrival time of the pulse to obtain the target distance information.It is used by a wide range of applications.The main work of this paper is to study how to effectively interfere with the pulse Doppler radar.In this paper,the interference of pulse Doppler radar is analyzed by simulation method,and a software simulation platform is constructed.It mainly consists of three modules: radar module,interference module and interference evaluation module,in which the radar module is completed the modeling and simulation of the pulse Doppler rada r;the interference module is generated various types of interference signals;the interference evaluation module is evaluated the interference effect of various interference signals.In this paper,The main work can be divided into the following three parts:1.Firstly,the application scenario of radar seeker is established,and the basic working principle of pulse Doppler radar and its performance under different PRF(pulse repetition frequency)are analyzed.Then,the radar is modeled and simulated in a modular way according to the radar signal processing flow.The model mainly includes radar signal generation module,transmitting module,spatial channel,receiving module and radar signal processing module.2.The classification of the radar jamming system and the radar active interference is sorted out.The mathematical modeling and simulation work of radio frequency noise interference and noise modulation interference in the jamming interference are carried out.The digital radio frequency storage technology is used to complete the deceptive interference Multi-fake target,distance traction,speed trailing,distance-speed joint drag mathematical modeling and simulation work.3.Based on the scene of airborne drag jamming,the pulse Doppler radar seeker is disturbed by pressing and deception.By analyzing the radar echo signal,it is subjected to pulse compression,MTI and MTD.The interference results of the various interfering signals on the radar seeker are verified by the simulation method. |
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