The Slow-Time k-Space of Radar Tomography and Applications to High-Resolution Target Imaging

This paper introduces anew concept of slow-time spatial frequency space, also known as “slow-time k-space,” and redefines the associated cross-range bandwidth, which arises naturally from Doppler radar tomography. The slow-time k-space is the most suitable for narrowband radar imaging, and can be augmented for higher resolution imaging by appropriate signal processing. The respective relationships with the more traditional concepts of fast-time k-space and signal (or range) bandwidth are explained. We also discuss image resolution limits and demonstrate the concepts with simulated data examples.