Super-resolution ISAR imaging via 2D unitary ESPRIT

A novel method employing two-dimensional (2D) unitary ESPRIT and a spatial smoothing technique is proposed for super-resolution ISAR imaging. The spatial smoothing technique is employed to resolve the contradiction that 2D unitary ESPRIT requests multiple snapshots; however, in radar imaging applications only one snapshot of the radar data are available. Experimental results are presented to verify the high resolution and feasibility of the proposed imaging algorithm in ISAR imaging.