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Phase Control in Interpolation for Backprojection of THz FMCW SAR Signals
Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.ORCID iD: 0000-0002-3928-6064
Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.ORCID iD: 0000-0003-3945-8951
Ruhr University Bochum, DEU.
Halmstad University.
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2022 (English)In: Proceedings International Radar Symposium, IEEE Computer Society, 2022, p. 10-15Conference paper, Published paper (Refereed)
Abstract [en]

The THz frequency spectrum opens a lot of applications in the imaging at sub-mm level. The increase of the operating frequency band for SAR imaging systems to the THz range has proportionally affected the amount of raw data to be stored and used for accurate image reconstruction. As a consequence, improvements in the existing SAR imaging algorithms to reduce the amount of data needed to achieve the appropriate quality of imaging is desired. This paper introduces the phase control procedure as an extension to the existing sinc interpolator for backprojecting complex-valued FMCW SAR data into a defined image plane. The proposed extension controls the phase of interpolated complex-valued SAR data parameters so that it includes appropriate information about the range distance between the SAR system and the given point of space. The extended algorithm is incorporated into the global backprojection algorithm and examined on the measurement data acquired via the 2pSENSE FMCW SAR system. The efficiency of the extended algorithm is evaluated through the comparison with the conventional nearest neighbor and sinc interpolation algorithms. © 2022 Warsaw University of Technology.

Place, publisher, year, edition, pages
IEEE Computer Society, 2022. p. 10-15
Series
Proceedings International Radar Symposium, ISSN 2155-5745, E-ISSN 2155-5753 ; 23
Keywords [en]
FMCW Backprojection, FMCW SAR, SAR data interpolation, THz, Frequency modulation, Interpolation, Phase control, Radar imaging, Synthetic aperture radar, Backprojections, Complex-valued, Data interpolation, Phase-Control, SAR data, SAR imaging, Image reconstruction
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-23830ISI: 000943326200002Scopus ID: 2-s2.0-85140440908ISBN: 9788395602054 (print)OAI: oai:DiVA.org:bth-23830DiVA, id: diva2:1708361
Conference
23rd International Radar Symposium, IRS 2022, Gdansk, 12 September 2022 through 14 September 2022
Funder
ELLIIT - The Linköping‐Lund Initiative on IT and Mobile CommunicationsAvailable from: 2022-11-03 Created: 2022-11-03 Last updated: 2023-04-04Bibliographically approved

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Ivanenko, YevhenVu, Viet ThuyPettersson, Mats

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