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Subspace tracking for nested arrays

Fountoulakis Emmanouil

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URIhttp://purl.tuc.gr/dl/dias/6F4094F7-A1FD-45D3-8578-74CFD1B6FDBA-
Identifierhttps://doi.org/10.26233/heallink.tuc.66130-
Languageen-
Extent665,8 kilobytesel
TitleSubspace tracking for nested arraysen
TitleΠαρακολούθηση υποχώρου για ένθετες συστοιχίες κεραιών el
CreatorFountoulakis Emmanouilen
CreatorΦουντουλακης Εμμανουηλel
Contributor [Thesis Supervisor]Karystinos Georgiosen
Contributor [Thesis Supervisor]Καρυστινος Γεωργιοςel
Contributor [Committee Member]Bletsas Aggelosen
Contributor [Committee Member]Μπλετσας Αγγελοςel
Contributor [Committee Member]Digalakis Vasilisen
Contributor [Committee Member]Διγαλακης Βασιληςel
PublisherΠολυτεχνείο Κρήτηςel
PublisherTechnical University of Creteen
Academic UnitTechnical University of Crete::School of Electrical and Computer Engineeringen
Academic UnitΠολυτεχνείο Κρήτης::Σχολή Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστώνel
Content SummaryIn radar, sonar, and mobile communications, the estimation of the directions from which multi- ple signals arrive at a point is called the direction of arrival (DoA) estimation problem and, over the past decades, has been performed often through uniform linear arrays (ULAs) in conjunc- tion with high-resolution subspace-based algorithms. Such techniques, however, have limited capability of the number of directions they can estimate; if the ULA consists of N antenna elements, then high-resolution subspace-based algorithms can estimate the directions of up to N − 1 signals. To increase this number, a novel structure that consists of N antenna elements and enables the estimation of O (N^2 ) signal directions has been developed recently. It lies on specific nonuniform-array structures which are called nested arrays. In this thesis, we first overviewed the structure and properties of nested arrays and eval- uated their performance through computer simulations. We observed that the nested arrays with conventional subspace-based signal-processing algorithms can offer high performance but require high complexity, which makes them impractical for real-time applications. Then, we developed novel subspace tracking techniques for nested arrays that have lower complexity, are proven to converge to the optimal, subspace-based estimator, and are capable of tracking changes in the directions of the arriving signals (for example, when a source is moving with respect to the array receiver).en
Type of ItemΔιπλωματική Εργασίαel
Type of ItemDiploma Worken
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2016-07-25-
Date of Publication2016-
SubjectSignal processing en
Bibliographic CitationEmmanouil Fountoulakis, "Subspace tracking for nested arrays", Diploma Work, School of Electrical and Computer Engineering, Technical University of Crete, Chania, Greece, 2016en
Bibliographic CitationΕμμανουήλ Φουντουλάκης, "Παρακολούθηση υποχώρου για ένθετες συστοιχίες κεραιών", Διπλωματική Εργασία, Σχολή Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών, Πολυτεχνείο Κρήτης, Χανιά, Ελλάς, 2016el

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