A MOVING TARGET RECONSTRUCTION APPROACH FOR THE MULTICHANNEL IN AZIMUTH HRWS SAR SYSTEM

Since the echo characteristics of moving targets are different from the stationary scene, the traditional reconstruction algorithm, i.e., the reconstruction filter algorithm, is not applicable. In this paper, a novel reconstruction approach of the moving target for a multichannel in azimuth high-resolution wide-swath (HRWS) synthetic aperture radar (SAR) system, modified from the traditional reconstruction filter algorithm, is proposed. The core of this method is to solve the problem of reconstruction filter mismatch by adapting the motion parameters of the moving target. Compared with the reconstruction filter algorithm, this method can not only achieve the accurate reconstruction of the stationary scene, but also reconstruct the spectrum of the moving target with nice performance. The simulated results of point targets are shown to confirm the effectiveness of the proposed method.