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

This paper introduces a new 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 narrow-band radar imaging, a...

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Bibliographic Details
Published in:IEEE transactions on aerospace and electronic systems 2018-12, Vol.54 (6), p.3047-3059
Main Authors: Tran, Hai-Tan, Melino, Rocco
Format: Article
Language:English
Subjects:
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Bandwidth
Bandwidths
Doppler radar
Doppler radar tomography (DRT)
high-resolution narrow-band radar
Image resolution
Imaging
inverse synthetic aperture radar (ISAR)
Medical imaging
Radar
Radar antennas
Radar imaging
Signal processing
Signal resolution
slow-time <inline-formula xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <tex-math notation="LaTeX"> k</tex-math> </inline-formula>-space
spatial diversity
spatial frequency space
Target recognition
tomographic imaging
Tomography
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Summary:This paper introduces a new 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 narrow-band 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.
ISSN:0018-9251
1557-9603
DOI:10.1109/TAES.2018.2840279