A new cross-range scaling method for ISAR based on the multiple dominant scatterers synthesis

This paper addresses the problem of cross-range scaling of inverse synthetic aperture radar (ISAR). It is the basis of obtaining the information about the target, such as the size and the shape. To accomplish the cross-range scaling, the rotating velocity (RV) of the target needs to be estimated first. In this paper, a new approach is presented for estimating the RV by analyzing the relation between the chirp rate of the cross-range signal and the range cell. A technique based on the multiple dominant scatterers synthesis is used to estimate the chirp rate. Finally, real data processing results are provided to verify the effectiveness of the proposed cross-range scaling method.