Abstract:

Automatic target recognition technology, which is based on the projection on the range subspace of synthetic aperture radar images, requires that the intersection between the range subspaces of the different targets should be minimal. However, to distinguish those targets with similar appearance and structure, the intersection between the corresponding range subspaces is big which results in performance of recognition degradation. By using the constraint between the projection subspace and the range subspace, an efficient method for constructing the projection subspace is proposed. The proposed method can enlarge the difference between the projections of the similar targets on the projection subspace and improve the performance of target recognition. Experimental results show that the projection subspace constructed by the proposed method increases the separablity between the different similar targets, and the recognition performance and efficiency are superior to other classical identification methods.