Cross-range scaling of inverse synthetic aperture radar images with complex moving targets based on parameter estimation

Abstract

To solve the problem of ISAR imaging cross-range scaling of complex motion of target, this paper analyzes kinetic mechanism of complex motion of the target. The motion forms will produce different Doppler frequency if the target is different. For 2D rotation target, the proportion of azimuth angle and pitch angle keeps constant, and the synthetic rotation vector is polynomial function of time. This paper takes “Matching Fourier Transform Algorithm” as the processing method to estimate the motion parameters of target. Additionally, the simulated result indicates the effectiveness of algorithm. For 3D rotation target, the paper adopts “Target Observation Matrix Decomposition method” to obtain European calibrated viewing angle vector matrix, and further get azimuth angle as well as pitch angle sequences of the target. Moreover, LS method is used for parameter estimation and the result is effective.