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Open AccessArticle

On the Slow-Time k-Space and its Augmentation in Doppler Radar Tomography

1
Intelligence, Surveillance, and Space Division, Defence Science and Technology Group, Edinburgh, SA 5111, Australia
2
Faculty of Engineering Computer & Mathematical Sciences, School of Electrical and Electronic Engineering, The University of Adelaide, North Terrace Campus, Adelaide, SA 5005, Australia
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(2), 513; https://doi.org/10.3390/s20020513 (registering DOI)
Received: 16 November 2019 / Revised: 10 January 2020 / Accepted: 11 January 2020 / Published: 16 January 2020
(This article belongs to the Special Issue Recent Advancements in Radar Imaging and Sensing Technology)
Doppler Radar Tomography (DRT) relies on spatial diversity from rotational motion of a target rather than spectral diversity from wide bandwidth signals. The slow-time k-space is a novel form of the spatial frequency space generated by the relative rotational motion of a target at a single radar frequency, which can be exploited for high-resolution target imaging by a narrowband radar with Doppler tomographic signal processing. This paper builds on a previously published work and demonstrates, with real experimental data, a unique and interesting characteristic of the slow-time k-space: it can be augmented and significantly enhance imaging resolution by signal processing. High resolution can reveal finer details in the image, providing more information to identify unknown targets detected by the radar.
Keywords: slow-time k-space; spatial frequency; Doppler radar tomography; radar imaging; k-space augmentation; high-resolution narrowband radar slow-time k-space; spatial frequency; Doppler radar tomography; radar imaging; k-space augmentation; high-resolution narrowband radar
MDPI and ACS Style

Tran, H.-T.; Heading, E.; Ng, B. .-H. On the Slow-Time k-Space and its Augmentation in Doppler Radar Tomography. Sensors 2020, 20, 513.

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