Abstract:

Imaging of precession targets with unsymmetrical appendixes is a key challenge for spatial targets imaging at present. The echo model of precession targets with unsymmetrical appendixes is established. Based on that, 4 microDoppler parameters needed for imaging are analyzed, and the corresponding parameters estimating method is given. With the parameters, a 3-D imaging method for precession targets is proposed based on 3-D complexvalued back projection. Firstly, the phase compensation factor is structured with the parameters. Then a 3-D search is done in timerange profile, and the targets 3-D image is got afterwards. Finally, simulations verify the effectiveness of the proposed method, and analyze the influence of parameters estimating error to the imaging result.