Novel micro-doppler signature extraction method of ballistic midcourse target
LEI Teng1,2, LIU Jinmang1, LI Song1, HU Guoping1 1.Air and Missile Defense Institute, Air Force Engineering University, Xi’an 710051, China 2.Unit 95859 of PLA, China
The identification of ballistic midcourse targets is always the difficult point in anti-missile system, while a new approach to identify the warhead is provided by the micro-Doppler of ballistic target. According to the characteristics of precession ballistic targets, the mathematical model of pyramidal ballistic missile warhead is established. Applying RSPWVD time-frequency transform to extracting the micro-Doppler signal, RSPWVD is seen as the best compared with WVD and SPWVD through simulation figures. Furthermore, an innovative method based on micro-Doppler time-frequency image to extract precession period is proposed. The results of simulation suggest that the innovative method has high precision and good performance of anti-noise.