Imaging of fast moving targets using undersampled SAR raw-data

In this paper we propose a novel methodology to estimate the true velocity of fast moving targets using a single synthetic aperture radar sensor without increasing the Pulse Repetition Frequency. The basic reasoning is that, although the returned echoes may be aliased in the azimuth direction, its phase is informative with respect to the moving target trajectory parameters. We will use this knowledge to retrieve the necessary information to achieve focused images of fast moving targets on their correct azimuth positions.