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Article: Frequency invariant uniform concentric circular arrays with directional elements

TitleFrequency invariant uniform concentric circular arrays with directional elements
Authors
Issue Date2013
PublisherIEEE.
Citation
IEEE Transactions on Aerospace and Electronic Systems, 2013, v. 49 n. 2, p. 871 - 884 How to Cite?
AbstractA new approach for designing frequency invariant (FI) uniform concentric circular arrays (UCCAs) with directional elements is proposed, and their applications to direction-of-arrival (DOA) estimation and adaptive beamforming are studied. By treating the sensors along the radial direction of the UCCA as linear subarrays and using appropriately designed beamformers, each subarray is transformed to a virtual element with appropriate directivity. Consequently, the whole UCCA can be viewed as a virtual uniform circular array (UCA) with desired element directivity for broadband processing. By extending the approach for designing FI-UCAs, the frequency dependency of the phase modes of the virtual UCA is compensated to facilitate broadband DOA and adaptive beamforming. Both the linear array beamformers (LABFs) and compensation filters can be designed separately using second- order cone programming (SOCP). Moreover, a new method to tackle the possible noise amplification problem in such large arrays by imposing additional norm constraints on the design of the compensation filters is proposed. The advantages of this decoupled approach are 1) the complicated design problem of large UCCAs can be decoupled into simpler problems of designing the LABFs and compensation filters, and 2) directional elements, which are frequently encountered, can be treated readily under the proposed framework. Numerical examples are provided to demonstrate the effectiveness and improvement of the proposed methods in DOA estimation, adaptive beamforming, and elevation control over the conventional FI-UCCA design method.
Persistent Identifierhttp://hdl.handle.net/10722/164064
ISSN
2015 Impact Factor: 1.672
2015 SCImago Journal Rankings: 1.151

 

DC FieldValueLanguage
dc.contributor.authorLiao, Ben_US
dc.contributor.authorTsui, KMen_US
dc.contributor.authorChan, SCen_US
dc.date.accessioned2012-09-20T07:55:08Z-
dc.date.available2012-09-20T07:55:08Z-
dc.date.issued2013en_US
dc.identifier.citationIEEE Transactions on Aerospace and Electronic Systems, 2013, v. 49 n. 2, p. 871 - 884en_US
dc.identifier.issn0018-9251-
dc.identifier.urihttp://hdl.handle.net/10722/164064-
dc.description.abstractA new approach for designing frequency invariant (FI) uniform concentric circular arrays (UCCAs) with directional elements is proposed, and their applications to direction-of-arrival (DOA) estimation and adaptive beamforming are studied. By treating the sensors along the radial direction of the UCCA as linear subarrays and using appropriately designed beamformers, each subarray is transformed to a virtual element with appropriate directivity. Consequently, the whole UCCA can be viewed as a virtual uniform circular array (UCA) with desired element directivity for broadband processing. By extending the approach for designing FI-UCAs, the frequency dependency of the phase modes of the virtual UCA is compensated to facilitate broadband DOA and adaptive beamforming. Both the linear array beamformers (LABFs) and compensation filters can be designed separately using second- order cone programming (SOCP). Moreover, a new method to tackle the possible noise amplification problem in such large arrays by imposing additional norm constraints on the design of the compensation filters is proposed. The advantages of this decoupled approach are 1) the complicated design problem of large UCCAs can be decoupled into simpler problems of designing the LABFs and compensation filters, and 2) directional elements, which are frequently encountered, can be treated readily under the proposed framework. Numerical examples are provided to demonstrate the effectiveness and improvement of the proposed methods in DOA estimation, adaptive beamforming, and elevation control over the conventional FI-UCCA design method.-
dc.languageengen_US
dc.publisherIEEE.-
dc.relation.ispartofIEEE Transactions on Aerospace and Electronic Systemsen_US
dc.rightsIEEE Transactions on Aerospace and Electronic Systems. Copyright © IEEE.-
dc.rights©2013 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.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleFrequency invariant uniform concentric circular arrays with directional elementsen_US
dc.typeArticleen_US
dc.identifier.emailTsui, KM: kmtsui11@hku.hken_US
dc.identifier.emailChan, SC: ascchan@hkucc.hku.hken_US
dc.identifier.authorityTsui, KM=rp00181en_US
dc.identifier.authorityChan, SC=rp00094en_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1109/TAES.2013.6494386-
dc.identifier.hkuros225074en_US
dc.identifier.volume49-
dc.identifier.issue2-
dc.identifier.spage871-
dc.identifier.epage884-
dc.publisher.placeUnited States-
dc.customcontrol.immutablejt 130412-

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