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Article: Uniform concentric circular arrays with frequency-invariant characteristics - Theory, design, adaptive beamforming and DOA estimation

TitleUniform concentric circular arrays with frequency-invariant characteristics - Theory, design, adaptive beamforming and DOA estimation
Authors
KeywordsArray processing
Beamspace
Broadband adaptive beamforming
Broadband direction-of-arrival (DOA) estimation
Design method
Frequency invariant (FI)
Uniform concentric circular array (UCCA)
Issue Date2007
PublisherIEEE.
Citation
Ieee Transactions On Signal Processing, 2007, v. 55 n. 1, p. 165-177 How to Cite?
AbstractThis paper proposes a new digital beamformer for uniform concentric circular arrays (UCCAs) having nearly frequency-invariant (FI) characteristics. The basic principle is to transform the received signals to the phase mode and remove the frequency dependency of the individual phase mode through the use of a digital beamforming or compensation network. As a result, the far-field pattern of the array, which is governed by a set of variable beamformer weights, is electronically steerable, and it is approximately invariant over a wider range of frequencies than conventional uniform circular arrays (UCAs). This also makes it possible to design the compensation network and the beamformer weights separately. The design of the compensation network is formulated as a second order cone programming (SOCP) problem and is solved optimally for minimax criterion. By employing the beamspace approach using the outputs of a set of fixed UCCA frequency-invariant beamformers (FIBs), a new beamspace MUSIC algorithm is proposed for estimating the direction-of-arrivals (DOAs) of broadband sources. Since the beampatterns of the UCCA-FIB is approximately invariant with frequency and is governed by a small set of weights, a very efficient adaptive beamformer using the minimum variance beamforming (MVB) approach can be developed. Simulation results using broadband Gaussian and multisinusoidal inputs show that the proposed adaptive UCCA-FIB is numerically better conditioned than the conventional broadband tapped-delay-line-based adaptive beamformers, due to the FI property and significantly fewer numbers of adaptive parameters. Consequently, a higher output signal-to-inference-plus-noise ratio over the conventional tapped-delay-line approach is observed. The usefulness of the proposed UCCA-FIB in broadband DOA estimation is also verified by computer simulation. © 2006 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/44804
ISSN
2015 Impact Factor: 2.624
2015 SCImago Journal Rankings: 2.004
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChan, SCen_HK
dc.contributor.authorChen, HHen_HK
dc.date.accessioned2007-10-30T06:10:35Z-
dc.date.available2007-10-30T06:10:35Z-
dc.date.issued2007en_HK
dc.identifier.citationIeee Transactions On Signal Processing, 2007, v. 55 n. 1, p. 165-177en_HK
dc.identifier.issn1053-587Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/44804-
dc.description.abstractThis paper proposes a new digital beamformer for uniform concentric circular arrays (UCCAs) having nearly frequency-invariant (FI) characteristics. The basic principle is to transform the received signals to the phase mode and remove the frequency dependency of the individual phase mode through the use of a digital beamforming or compensation network. As a result, the far-field pattern of the array, which is governed by a set of variable beamformer weights, is electronically steerable, and it is approximately invariant over a wider range of frequencies than conventional uniform circular arrays (UCAs). This also makes it possible to design the compensation network and the beamformer weights separately. The design of the compensation network is formulated as a second order cone programming (SOCP) problem and is solved optimally for minimax criterion. By employing the beamspace approach using the outputs of a set of fixed UCCA frequency-invariant beamformers (FIBs), a new beamspace MUSIC algorithm is proposed for estimating the direction-of-arrivals (DOAs) of broadband sources. Since the beampatterns of the UCCA-FIB is approximately invariant with frequency and is governed by a small set of weights, a very efficient adaptive beamformer using the minimum variance beamforming (MVB) approach can be developed. Simulation results using broadband Gaussian and multisinusoidal inputs show that the proposed adaptive UCCA-FIB is numerically better conditioned than the conventional broadband tapped-delay-line-based adaptive beamformers, due to the FI property and significantly fewer numbers of adaptive parameters. Consequently, a higher output signal-to-inference-plus-noise ratio over the conventional tapped-delay-line approach is observed. The usefulness of the proposed UCCA-FIB in broadband DOA estimation is also verified by computer simulation. © 2006 IEEE.en_HK
dc.format.extent849221 bytes-
dc.format.extent1834 bytes-
dc.format.extent27162 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherIEEE.en_HK
dc.relation.ispartofIEEE Transactions on Signal Processingen_HK
dc.rights©2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectArray processingen_HK
dc.subjectBeamspaceen_HK
dc.subjectBroadband adaptive beamformingen_HK
dc.subjectBroadband direction-of-arrival (DOA) estimationen_HK
dc.subjectDesign methoden_HK
dc.subjectFrequency invariant (FI)en_HK
dc.subjectUniform concentric circular array (UCCA)en_HK
dc.titleUniform concentric circular arrays with frequency-invariant characteristics - Theory, design, adaptive beamforming and DOA estimationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1053-587X&volume=55&issue=1&spage=165&epage=177&date=2007&atitle=Uniform+Concentric+Circular+Arrays+With+Frequency-Invariant+Characteristics—Theory,+Design,+Adaptive+Beamforming+and+DOA+Estimationen_HK
dc.identifier.emailChan, SC:scchan@eee.hku.hken_HK
dc.identifier.authorityChan, SC=rp00094en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1109/TSP.2006.882109en_HK
dc.identifier.scopuseid_2-s2.0-33947408739en_HK
dc.identifier.hkuros140410-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33947408739&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume55en_HK
dc.identifier.issue1en_HK
dc.identifier.spage165en_HK
dc.identifier.epage177en_HK
dc.identifier.isiWOS:000243281200017-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridChan, SC=13310287100en_HK
dc.identifier.scopusauthoridChen, HH=35188524100en_HK

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