ISAR image reconstruction algorithm

Abstract

This paper deals with generalized ISAR geometry and image reconstruction technique. Three-dimensional (3-D) ISAR scenario is projected on two-dimensional (2-D) radar registration plane. The arbitrary movement of the object is decomposed into two components: radial displacement of the object’s geometric center and rotational movement around it. It is proven that the demodulated ISAR signal, reflected from the target during aperture synthesis, can be considered as 2-D Fourier transformation of the image function, corrected by an exponential term and as a consequence, the image function can be extracted by 2-D inverse Fourier transformation of the phase corrected ISAR signal. Numerical experiment validating aforementioned statements is performed.