<div class="csl-bib-body">
<div class="csl-entry">Park, Y., Gerstoft, P., & Mecklenbräuker, C. (2024). Atom-constrained Gridless DOA Refinement with Wirtinger Gradients. <i>IEEE Open Journal of Signal Processing</i>, <i>5</i>, 1134–1146. https://doi.org/10.1109/OJSP.2024.3496815</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/207486
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dc.description.abstract
This paper proposes gridless sparse direction-of-arrival (DOA) refinement using gradient-based optimization. The objective function minimizes the fit between the sample covariance matrix (SCM) and a reconstructed covariance matrix. The latter is constrained to contain only a few atoms, but otherwise maximally matches the SCM. This reconstruction enables analytic derivatives with respect to DOA using Wirtinger gradients. The sensitivity of the solution to local minima is addressed by initializing near the true DOAs, where a user-input-free gridded sparse Bayesian learning is employed. Numerical results validate the effectiveness of the DOA refinement using analytic gradients, demonstrating its ability to reach the Cramer-Rao bound and achieve higher resolution compared to conventional gridless DOA estimation methods. The approach is validated by considering different numbers of DOAs, grid sizes, DOAs on/off the grid, fewer (even a single) snapshots, coherent arrivals, closely separated DOAs, and many DOAs.
en
dc.language.iso
en
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dc.publisher
IEEE
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dc.relation.ispartof
IEEE Open Journal of Signal Processing
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dc.subject
Atom-based signal recovery
en
dc.subject
direction of arrival (DOA) estimation
en
dc.subject
gridless estimation
en
dc.subject
covariance reconstruction
en
dc.subject
Wirtinger gradients
en
dc.title
Atom-constrained Gridless DOA Refinement with Wirtinger Gradients
en
dc.type
Article
en
dc.type
Artikel
de
dc.contributor.affiliation
University of California, San Diego, United States of America (the)
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dc.contributor.affiliation
University of California, San Diego, United States of America (the)
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dc.description.startpage
1134
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dc.description.endpage
1146
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dc.type.category
Original Research Article
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tuw.container.volume
5
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tuw.journal.peerreviewed
true
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tuw.peerreviewed
true
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wb.publication.intCoWork
International Co-publication
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tuw.researchTopic.id
I7
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tuw.researchTopic.name
Telecommunication
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tuw.researchTopic.value
100
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dcterms.isPartOf.title
IEEE Open Journal of Signal Processing
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tuw.publication.orgunit
E389 - Institute of Telecommunications
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tuw.publisher.doi
10.1109/OJSP.2024.3496815
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dc.date.onlinefirst
2024-11-11
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dc.identifier.eissn
2644-1322
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dc.description.numberOfPages
13
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tuw.author.orcid
0000-0001-6692-0262
-
tuw.author.orcid
0000-0002-0471-062X
-
tuw.author.orcid
0000-0001-9571-0379
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wb.sciencebranch
Elektrotechnik, Elektronik, Informationstechnik
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wb.sciencebranch.oefos
2020
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wb.sciencebranch.value
100
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item.openairetype
research article
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item.cerifentitytype
Publications
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item.grantfulltext
none
-
item.languageiso639-1
en
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item.openairecristype
http://purl.org/coar/resource_type/c_2df8fbb1
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item.fulltext
no Fulltext
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crisitem.author.dept
University of California, San Diego
-
crisitem.author.dept
E389 - Institute of Telecommunications
-
crisitem.author.orcid
0000-0001-6692-0262
-
crisitem.author.orcid
0000-0002-0471-062X
-
crisitem.author.orcid
0000-0001-9571-0379
-
crisitem.author.parentorg
E350 - Fakultät für Elektrotechnik und Informationstechnik