Sparse Representation of Targets with Mixed Scattering Primitives

A combination of two scattering primitives - wedge diffraction primitives and isotropic point scatterers - is used to reconstruct far-field monostatic scattering patterns of several target geometries and addresses shortcomings of traditional approaches that only use a single type of primitive (e.g., approximations in analytic solutions, slow convergence). An l(1)-norm minimization technique is applied to determine a set of weights for the point scatterers. We show that combining these two types of primitives yields better reconstruction performance than when each primitive type is used individually.