Multi-scale compressive processing for inverse scattering within the contrast source formulation

In this paper, an effective microwave imaging method based on the Compressive Processing (CP) paradigm combined with an Iterative Multi-Scaling (IMS) approach within the contrast source formulation is presented. For each step of the IMS procedure, a customized relevance vector machine (RVM) is employed to retrieve the unknowns contrast source coefficients of a suitable sparsification basis and driven to search for the solution within a restricted domain defined according to the information progressively acquired on the scatterer features.