Imaging experiments with a 340-GHz FMCW radar and frequency-diverse holograms

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorPälli, Samu Villeen_US
dc.contributor.authorTamminen, Aleksien_US
dc.contributor.authorHiltunen, Paavoen_US
dc.contributor.authorRexhepi, Sazanen_US
dc.contributor.authorBonmann, Marleneen_US
dc.contributor.authorBryllert, Tomasen_US
dc.contributor.authorRobertson, Duncan A.en_US
dc.contributor.authorAla-Laurinaho, Juhaen_US
dc.contributor.authorStake, Janen_US
dc.contributor.authorTaylor, Zacharyen_US
dc.contributor.departmentDepartment of Electronics and Nanoengineeringen
dc.contributor.editorHedden, Abigail S.en_US
dc.contributor.editorMazzaro, Gregory J.en_US
dc.contributor.editorRaynal, Ann Marieen_US
dc.contributor.groupauthorZachary Taylor Groupen
dc.contributor.groupauthorVille Viikari Groupen
dc.contributor.organizationDepartment of Electronics and Nanoengineeringen_US
dc.contributor.organizationChalmers University of Technologyen_US
dc.contributor.organizationUniversity of St Andrewsen_US
dc.date.accessioned2023-10-04T06:08:01Z
dc.date.available2023-10-04T06:08:01Z
dc.date.issued2023en_US
dc.descriptionFunding Information: This work is supported by the Business Finland research to business project R2B-MilliScan. Aalto Design Factory is thanked for the manufacturing of the quasioptics. Mr. Markus Grönholm from Alshain Oy is thanked for manufacturing the hologram and radar software development. Publisher Copyright: © 2023 SPIE.
dc.description.abstractWe present recent developments of a standoff imaging system based on a frequency-diverse phase hologram and deep neural networks. The single-pixel imaging system operates in a monostatic configuration consisting of a 340-GHz FMCW radar and a frequency-diverse phase hologram to interrogate the radar down range direction with spatially varying, frequency-dependent field patterns. The measured back-reflected signal contains spatial reflectivity information from the target, and the fast chirp rate of the radar enables real-time imaging performance. Together with simultaneously acquired visible-light images, a deep neural network integrated into the submillimeter-wave data readout electronics can map the received signal onto a 2D image without mechanical or active electrical beam scanning. In experiments, we have collected submillimeter-wave and visible-light data of a moving target in the region of interest with a 60-Hz frame rate. The results suggest that the system can image the moving target with a resolution comparable to the theoretical diffraction limit. The minimal hardware complexity and good imaging performance of the demonstrated computational submillimeter-wave imaging system support its potential as a cost-effective and easily deployable solution for various imaging applications.en
dc.description.versionPeer revieweden
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationPälli, S V, Tamminen, A, Hiltunen, P, Rexhepi, S, Bonmann, M, Bryllert, T, Robertson, D A, Ala-Laurinaho, J, Stake, J & Taylor, Z 2023, Imaging experiments with a 340-GHz FMCW radar and frequency-diverse holograms . in A S Hedden, G J Mazzaro & A M Raynal (eds), Radar Sensor Technology XXVII ., 125350M, Proceedings of SPIE - The International Society for Optical Engineering, vol. 12535, SPIE, Radar Sensor Technology, Orlando, Florida, United States, 01/05/2023 . https://doi.org/10.1117/12.2663757en
dc.identifier.doi10.1117/12.2663757en_US
dc.identifier.isbn978-151066184-4
dc.identifier.issn0277-786X
dc.identifier.issn1996-756X
dc.identifier.otherPURE UUID: 0f16b6b0-7da1-4ae3-8f6a-20df89b53715en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/0f16b6b0-7da1-4ae3-8f6a-20df89b53715en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85171162208&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/122780640/Palli_et_al_Imaging_experiments_SPIE.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/123778
dc.identifier.urnURN:NBN:fi:aalto-202310046134
dc.language.isoenen
dc.relation.ispartofRadar Sensor Technologyen
dc.relation.ispartofseriesProceedings of SPIE - The International Society for Optical Engineeringen
dc.relation.ispartofseriesVolume 12535en
dc.rightsopenAccessen
dc.subject.keywordFMCW radaren_US
dc.subject.keywordHologramen_US
dc.subject.keywordimagingen_US
dc.subject.keywordneural networken_US
dc.subject.keywordsubmillimeter-waveen_US
dc.titleImaging experiments with a 340-GHz FMCW radar and frequency-diverse hologramsen
dc.typeA4 Artikkeli konferenssijulkaisussafi
dc.type.versionpublishedVersion
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