Pulse Doppler Radar Seeker Modeling And Simulation

In the modern war, weapon system has been more and more threatened by electronic jamming. Therefore evaluation of weapon system must take its counter-jamming performance into account. Traditional simulation methods of air defense missile weapon system mainly focus on the simulation of control system and guide system, and do not deal with signal receiving and signal processing. So it is urgent to investigate the simulation method of signal level in order to properly evaluate the weapon system by the way of computer simulation. In the paper, a coherent video signal simulation is applied to model and simulate a pulse Doppler radar seeker.The paper includes four sections followed here:The first section studies the modeling of signals of pulse Doppler radar seeker, and establishes a radar signal simulation model, including radar emitting signal model, receiving signal model, receiving echo signal model, clutter model, noise model, sum channel directional pattern of antenna model, difference channel directional pattern of antenna model, sheltering model, RCS model, glint noise model, etc.The second section studies signal processing of pulse Doppler radar seeker, and establishes radar signal processing mathematical model and data processing mathematical model for simulation, including windowing, Doppler filtering, envelope demodulation, PDI, CFAR, centering, velocity tracking, angle tracking, a -b filtering, etc.The third section studies the modeling of modified proportion guiding, and establishes guiding model, then dynamic simulation results is provided.The fourth section studies the modeling of broad band blocking jamming and coherent jamming, and analyses the principal of coherent jamming and the factors of influencing the jamming effect is provided. The performance of pulse Doppler radar seeker is simulated when certain jamming methods is exerted.A pulse Doppler radar seeker simulation system is established, by using the simulation system the performance of pulse Doppler radar seeker is evaluated when jammed.