Novel Approach for ISAR Cross-Range Scaling of Maneuvering Target

Cross-range scaling is very important for the inverse synthetic aperture radar (ISAR) imaging of non-cooperative target, and it is useful for the target feature extraction and recognition. In this paper, a novel approach for the ISAR cross-range scaling of maneuvering target is proposed. It assumes that the target has a non-uniform rotation, and the initial rotation velocity and rotation acceleration can be estimated. Through the rotational correlation of the instantaneous ISAR images sequence generated by the range-instantaneous-Doppler (RID) method, an approximate linear relationship between the time and the rotation velocity can be obtained to estimate the rotational parameters. The experimental results demonstrate the effectiveness of the novel algorithm proposed in this paper.