Method and apparatusfor 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 (R P ); and generating a sequence of SAR images (I A , I SA ) starting from the pulse-repetition frequency signal (PRF). In particular, SAR images with low azimuth resolution (I SA ) are generated by of coherent integration of the pulse-repetition frequency signal (PRF) for a sub-aperture time (T SA ) shorter than an aperture time (T A ). In addition, the method envisages generating difference images (I D ) through point-to-point difference between subsequent low azimuth resolution SAR images (I SA ), and recognizing patterns (D) associated to moving objects (3) in the difference images (I D ) .