A multistage Weiner filter STAP algorithm for non-side-looking radar

Space-time adaptive processing (STAP) based techniques has gained popularity due to their ability to adaptively cancel the interference in the angle Doppler domain. The major contributor of interference in airborne radar is ground clutter. For side-looking airborne radar, the ground clutter is localized to the diagonal in the angle Doppler domain. However, for non-side-looking airborne radar, the clutter exhibits higher rank and takes the shape of an ellipse. Also, practical schemes derive spatial channels from sub-arrays for dimensionality reduction. This paper characterizes the sub-array based STAP algorithm performance of a multistage Wiener filter for non-side-looking active electronically scanned array based airborne radar.