Anti-jamming techniques for multichannel SAR imaging

Abstract

An airborne broadband jammer present in the mainbeam of a Synthetic Aperture Radar (SAR) can potentially destroy a large region of the SAR image. In addition to this, multipath reflections from the ground, known as hotclutter or terrain scattered interference will add a non-stationary interference component to the image. The goal of interference suppression for SAR is to successfully suppress these interferences while not significantly effecting the image quality by blurring, reducing the resolution or raising the sidelobe level. This paper provides an analysis of the degradation from hot-clutter, the limited restoration that slow-time Space Time Adaptive Processing (STAP) can provide and how fast-time STAP can improve the final image.