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The Research on Doppler-only Imaging Algorithm of the Mid-course Missile Object |
Ding Xiao-feng; Wei Xi-zhang; Hu Jie-min; Li Xiang |
School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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Abstract The midcourse missile imaging method is the key technology for the missile-defense system. Conventional ISAR imaging methods require a uniform function to compensate the phase of the echo. The function is difficult to acquire in the wideband case, so the ISAR imaging result is always smeared. This paper provides a new signal processing algorithm called time-frequency trunk line extraction method. By enhancing the amplitude of the time-frequency doppler which extracted from the narrowband radar return signal, the method improves the doppler imaging resolution effectively. The simulation results and anechoic chamber data of the representative cone-shaped object show that the imaging of the missile target can be obtained from the narrowband radar doppler information using this method.
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Received: 04 December 2008
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