Two-Dimensional DOA Estimation via Shifted Sparse Arrays with Higher Degrees of Freedom

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dc.contributor.authorElbir, Ahmet Musab
dc.date.accessioned2020-04-30T23:46:50Z
dc.date.available2020-04-30T23:46:50Z
dc.date.issued2019
dc.departmentDÜ, Mühendislik Fakültesi, Elektrik-Elektronik Mühendisliği Bölümüen_US
dc.descriptionElbir, Ahmet M./0000-0003-4060-3781en_US
dc.descriptionWOS: 000500974200008en_US
dc.description.abstractSparse antenna arrays provide larger virtual arrays to estimate the direction of arrivals (DOAs) of more sources than the number of physical antennas in the array. While the degrees of freedom (DOF) can be increased by the special structure of the antenna array, a shift in the antenna positions can generate new lags in the difference co-array; hence, more sources can be resolved. In this paper, we propose shifted sparse array structures composed of two overlapping arrays shifted by one lag. It is shown that the shifting property fills the holes in the co-array, which yields larger virtual arrays. We derive stationary and moving array models where overlapping sparse arrays can be realized. The proposed shifting property is applied to coprime, nested and sparse linear arrays, and we show that the proposed technique guaranteed to increase the DOF. Using the proposed sparse array structures, we also propose a 2-D DOA estimation algorithm by utilizing the cross-covariance matrix of an L-shaped sparse array. The performance of the proposed approach is evaluated through numerical simulations, and we show that it can resolve more sources than the conventional sparse arrays with the same number of physical antennas, providing less computational complexity.en_US
dc.identifier.doi10.1007/s00034-019-01127-9en_US
dc.identifier.endpage5575en_US
dc.identifier.issn0278-081X
dc.identifier.issn1531-5878
dc.identifier.issue12en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage5549en_US
dc.identifier.urihttps://doi.org/10.1007/s00034-019-01127-9
dc.identifier.urihttps://hdl.handle.net/20.500.12684/5294
dc.identifier.volume38en_US
dc.identifier.wosWOS:000500974200008en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSpringer Birkhauseren_US
dc.relation.ispartofCircuits Systems And Signal Processingen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAntenna arraysen_US
dc.subjectSparse arraysen_US
dc.subjectDOA estimationen_US
dc.subjectCoprime arraysen_US
dc.subjectNested arraysen_US
dc.subjectArray shiftingen_US
dc.titleTwo-Dimensional DOA Estimation via Shifted Sparse Arrays with Higher Degrees of Freedomen_US
dc.typeArticleen_US

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