An Algorithm for High-Resolution Multichannel SARGMTI Processing Using 3D STAP and Continuous Subaperture

For target detection in airborne high-resolution multichannel SAR-GMTI system, an algorithm using 3D STAP based on continuous multiple subaperture is proposed, and also a high precision positioning error compensation method is introduced. The preprocessing is carried out on the multichannel echo firstly, including range compression, motion compensation, then one channel data is selected to SAR imaging, and 3D STAP processing and target detection are performed on multichannel data. Finally, the plot and image results are superimposed into a SAR-GMTI map. Through real data processing, it has been proven that the proposed algorithm is effective and has a valid target detection capability and positioning accuracy.