Inverse Synthetic Aperture Radar Echo Decomposition of Ballistic Target Based on Chirplet
Jin Guang-hu① Gao Xun-zhang① Li Xiang① Chen Yong-guang②
①(School of Electronics Science and Engineering, National University of Defense Technology, Changsha 410073, China) ②(Unit 63880, PLA, Luoyang 471003, China)
Abstract：The radar echo separation of appendix part is the key for improving ISAR image of ballistic target. This paper establishes the echo model of ballistic target. And the Doppler difference of body and appendix part is analyzed. A new decomposition in slow-time domain is proposed. The body echo is decomposed into several LFM signal components. The echo of body and appendix is reconstructed. Explicit procedure is given. Simulation result shows that the ISAR image is much better compared to the image based on original data.
2010, Vol. 32 
