Ground Moving Target Indication of Multi-Channel SAR Based on Joint CSI-Relax Method.

For synthetic aperture radar (SAR) images, there are many defocused moving targets with azimuthal deviation. Ground moving target indication (GMTI) is developing rapidly to detect moving target for traffic surveillance and military vehicle tracking. In this paper, multi-channel SAR-GMTI technology is studied and a moving target detection method based on clutter suppression interference (CSI) and relaxation-based cyclic (RELAX) is proposed to detect moving target efficiently and accurately, the time of which is only 0.22% of the time by global RELAX. Combined with multi-channel signals, CSI is performed to detect targets of interest. Then, RELAX is applied to further reduce false alarm and estimate radial velocity for geolocation. Experimental SAR data processing results show that the method is effective for moving target detection and parameter estimation.