Fast Back-projection Algorithm for Synthetic Aperture Radar Imaging System with a Lightweight Unmanned Aircraft System
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Date
2018-11-01
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Abstract
The back-projection algorithm coherently combines backscatter or tomography data to produce images. It has been widely used in the medical imaging field and for synthetic aperture radar imaging. With back-projection, the imaging process can be very time-consuming; therefore, in this effort we have presented a fast back-projection algorithm that provides significant computational savings with only modest loss in image quality. This paper introduces the back-projection algorithm and two fast back-projection algorithms. In addition, this paper discusses an IQ balance method necessary in practice for calibration of hardware imperfections in a quadrature receiver.