GMTI based on a combination of DPCA and ATI

A novel algorithm is presented for SAR ground moving target indication (GMTI). This algorithm uses improved DPCA for a coarse indication and reformative ATI for a fine indication. First, a DPCA method is used to suppress the weak clutter, and it also involves the registration, compensation and subtraction of the image. Then, a finer ATI method is applied to detect the moving objects out of the pixels picked out by DPCA, and it involves the interferometry, and the suppression of the strong clutter. Facts prove that this algorithm can detect even the weak moving target well. In addition, this algorithm is automatic, that is, all thresholds are acquired from the signal. A series of test results from real field data of Institute of Electronics, Chinese Academy of Sciences shows the effectiveness of this algorithm.