Enhanced, high resolution radar imaging based on robust regularization

We propose an enhanced image reconstruction method for spotlight-mode synthetic aperture radar (SAR). Our approach involves extension of feature preserving regularization techniques developed in other applications to the complex-valued SAR imaging problem. Compared to conventional image formation schemes, our approach offers increased resolvability of point-scatterers, enhancement of object shapes, reduced sidelobes and reduced speckle. We present the effectiveness of the proposed method on synthetic and real SAR scenes.