Luo Ying 1 , Zhang Qun 1 , Wang Guo-zheng 1 , Guan Hua 1 , Bai You-qing 1
01 December 2012
Micro-motion, Micro-Doppler, Orthogonal Matching Mursuit (OMP), Wideband radar
In order to extract the micro-motion signatures in condition of Migration Through Range Cells (MTRC) of micro-motional scatterers and azimuthal undersampling in wideband radar, a method based on the Orthogonal Matching Pursuit (OMP) decomposition of the complex image is proposed. By making use of the amplitude and phase information of “range-slow-time image”, a set of micro-Doppler signal atoms is constructed in the complex image space. The OMP algorithm in vector space is then extend to the complex image space to obtain the micro-motion parameters. Simulations demonstrate the proposed method can extract the micro-motion signatures when MTRC of micro-motional scatterers is occurred, and can also work well when the sampling rate is lower than the Nyquist sampling rate.
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