A research of moving targets detection and imaging by SAR

The motivation for this work has come from the problem of providing high resolution images of moving targets by synthetic aperture radars (SAR). The paper investigates the application, of joint time-frequent distribution (TFD) for detection and estimation of target motion parameters. Three kinds of TFD-short time Fourier transform, wavelet transform and Wigner-Ville distributions (WVD) are discussed. The WVD is chosen because it presents some important feature concerning detection and estimation issues. Furthermore, the Hough transform is employed to suppress the disturbing crossterms resulting from the bilinear character of the WVD. The fast algorithm and the performance of the proposed approach are also studied. The simulation results show the effectiveness of the two algorithms