Sub-aperture method for the wide-bandwidth wide-angle inverse synthetic aperture radar imaging

摘要

In this paper, a method for obtaining focused inverse synthetic aperture radar (ISAR) images of targets based on the radar backscattering measurements taken over wide bands and wide angles [1]. The proposed method divides wide angle and wide frequency band into small aperture bands in the spatial frequency or Fourier domain. This set-up makes it possible to use fast calculation of ISAR images for every sub-aperture data set as in the case of standard ISAR case of small-bandwidth and small-angle. The details of the method are presented and numerical examples are given for the validation the method. The electromagnetic scattering estimation from the target is calculated via a hybrid simulator that uses both the physical optics [1ߝ3] and the shooting u00026; bouncing ray concepts [4].