Baseband Doppler Centroid Estimation for Ground Moving Target with Multichannel SAR

In multichannel synthetic aperture radar (SAR) Ground Moving Target Indication (GMTI) systems, Doppler centroid (DC) is an essential parameter for spectral reconstruction and image focusing. However, conventional DC estimator for stationary scene faces many problems in moving target with multichannel SAR, such as low sampling rate and channels selection. To estimate the baseband DC of moving target, a modified CDE method for multichannel SAR GMTI system is proposed in this paper. Simulation results demonstrate the effectiveness of this method.