Velocity Layover Solution in VSAR Image

In the velocity synthetic aperture radar (VSAR), multiple moving targets in image domain may be superposed in the same range-azimuth cell and, therefore, may not be easily distinguished from each other. This phenomenon is named "velocity layover" of multiple moving targets in this paper. A super-resolution spectrum estimation method, i.e., spatial projection processing, is used to solve this problem. It is shown that the superposed targets can be reconstructed in velocity images (V-images), and their motion parameters can be estimated respectively. Therefore, the superposed targets can be located respectively via the proposed method