METHOD AND APPARATUS FOR DETECTION OF MOVING OBJECTS BY SAR IMAGES

摘要

A method for the detection of moving objects (3) by SAR images envisages the steps of: generating a pulse-repetition frequency signal (PRF) starting from a radar signal (RP); and generating a sequence of SAR images (IA, ISA) starting from the pulse-repetition frequency signal (PRF). In particular, SAR images with low azimuth resolution (ISA) are generated by of coherent integration of the pulse-repetition frequency signal (PRF) for a sub-aperture time (TSA) shorter than an aperture time (TA). In addition, the method envisages generating difference images (ID) through point-to-point difference between subsequent low azimuth resolution SAR images (ISA), and recognizing patterns (D) associated to moving objects (3) in the difference images (ID) .