A non-homogeneous STAP approach combined with RD-ATI technique

In this paper, a non-homogeneous Space-Time Adaptive Processing (STAP) approach is proposed. In the approach, Range-Doppler domain ATI (RD-ATI) technique is used as a Non-Homogeneous Detector (NHD) which provides prior knowledge of moving targets, then Power Select Training (PST) method is employed to restrain clutter power non-homogeneous, and Frequency Domain Substitution (FDS) method used to eliminate the discrete interference. The approach improves conventional STAP performance significantly and greatly reduces computational burden, which has a great practical value. The result of real data from a three-channel SAR/GMTI system shows efficiency of the approach.