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Imaging of Micromotion Targets With Rotating Parts Based on Empirical-Mode Decomposition

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5 Author(s)
Xueru Bai ; Nat. Key Lab. for Radar Signal Process., Xidian Univ., Xian ; Mengdao Xing ; Feng Zhou ; Guangyue Lu
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For micromotion targets with rotating parts, the inverse synthetic-aperture-radar image of the main body may be shadowed by the micro-Doppler. To solve this problem, this paper proposes an imaging algorithm based on the complex-valued empirical-mode decomposition. First, the radar echoes are decomposed into a series of complex-valued intrinsic-mode functions (IMFs). Then, the IMFs from the rotating parts and those from the main body are separated according to the characteristics of their zero-crossings. Finally, the well-focused imaging of the main body via traditional imaging algorithm and the accurate parameter estimation of the rotating part can be obtained. Both the imaging results for the simulated and measured data are given to verify the validity of the proposed algorithm.

Published in:

Geoscience and Remote Sensing, IEEE Transactions on  (Volume:46 ,  Issue: 11 )

Date of Publication:

Nov. 2008

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