ISAR imaging based on two-dimensional GTD scattering model

In this paper, we briefly outline two scattering models, which can describe the inverse synthetic aperture radar (ISAR) return signal. The first one is a point scatterer model, whereas the second one is based on the geometrical theory of diffraction (GTD). The stepped frequency (SF) modulation case is treated for a two-dimensional ISAR geometry. Well-known ISAR imaging algorithms are applied to the synthetic ISAR data generated by both models. We also clarify the applicability of these algorithms for the case of the GTD-based model. Based on the obtained ISAR images, useful conclusions are drawn with respect to the radar scattering physics.