A novel algorithm to estimate moving target velocity for a spaceborne high resolution and wide swath (HRWS) synthetic aperture radar (SAR)/ground moving target indication (GMTI) system is presented. To retain the power of the moving target, one needs to know the velocity of the moving target before clutter suppression and spectrum reconstruction. According to the relationship between the velocity and cone angles, the estimation of velocity is transformed into the estimation of direction-of-arrival (DOA) of the received signal using the sparse DOA technique. If the clutter is ignorable, the algorithm is directly applied to the received signal. Otherwise a preprocessing based block matrix is performed. Simulated results confirm the effectiveness of the proposed algorithm.
['Taoli Yang', 'Yong Wang']
A novel algorithm to estimate moving target velocity for a spaceborne HRWS SAR/GMTI system