Range migration correction for maneuvering target based on generalized keystone transform

This paper considers the range migration correction problem for realizing the coherent integration of a maneuvering target´s energy, involving range walk and range curvature within the coherent integration period. A range migration correction algorithm based on the generalized keystone transform (GKT) is proposed, where two GKT operations and fold factor phase term compensation are employed to remove the range walk and range curvature. Then the coherent integration is obtained via Fourier transform. Finally, simulations are provided to demonstrate the effectiveness and the results show that the proposed method outperforms existing approaches.