Synthetic Aperture Radar Ghost Image Cancellation Using Broadband Time Reversal Averaging Techniques

In this paper, we present a time reversal averaging scheme for removing ghost images which occur in synthetic aperture radar (SAR) target imaging in a rich scattering environment. In the highly cluttered environment, the ghost images due to secondary scattering significantly deteriorate the quality of conventional SAR image. The time reversal (TR) method enables focusing on the target, significantly enhancing signal-to-noise ratio. By averaging TR-SAR images produced using different probing angles, the target image is coherently enhanced and the ghost images due to secondary scattering are significantly reduced. The effectiveness of the scheme is demonstrated via both computer simulation analysis and experimental measurements.