Virtual array imaging radar azimuth resolution analysis

this paper, a virtual array technique is proposed for forward-looking imaging, where the virtual aperture is obtained on the multi-input/multi-output (MIMO) theory. The analytical expression of the azimuth resolution of the multi- input/double-output virtual array is derived, which establishes the bridge between the virtual aperture technique and synthetic aperture technique and offers a unified frame to process virtual aperture images and synthetic aperture images. The theoretic analysis on the virtual array imaging radar azimuth resolution has also been validated using real data results.