Detection of slow moving targets in SAR images using STAP processing with two-channel sigma-delta antenna

To obtain moving target detection in SAR images, strong signals from nonmoving objects (ground clutter) have to be removed. In the classical approach for single channel SAR data, simple FIR filtering or frequency-domain filtering is used. The disadvantage of this approach is significant weakening or masking of moving target echo (by either wide transition band or limited attenuation in stopband), which makes the detection possible only for targets that are strong and well separated in frequency domain. This can be overcome by STAP technique for multi channel SAR data. In this paper, the analysis of channel mismatch influence on slow moving target detection is performed for the case of two channel sigma-delta antenna