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Article: Adaptive beamforming and DOA estimation using uniform concentric spherical arrays with frequency invariant characteristics

TitleAdaptive beamforming and DOA estimation using uniform concentric spherical arrays with frequency invariant characteristics
Authors
KeywordsArray processing
Broadband 2-D DOA estimation
Broadband adaptive beamforming
Design method
Frequency invariant
SOCP
Uniform concentric spherical arrays
Issue Date2007
PublisherSpringer New York LLC. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=0922-5773
Citation
Journal Of Vlsi Signal Processing Systems For Signal, Image, And Video Technology, 2007, v. 46 n. 1, p. 15-34 How to Cite?
AbstractThis paper proposes a new digital beamformer for uniform concentric spherical array (UCSA) 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 network. It is shown that the far field pattern of the array is determined by a set of weights and it is approximately invariant over a wide range of frequencies. FI UCSAs are electronic steerable in both the azimuth and elevation angles, unlike their concentric circular array counterpart. The frequency invariant characteristic of the FI UCSA also makes it possible to design separately the compensation network and beamformer weighting coefficients. The design of the compensation network is formulated as a second order cone programming (SOCP) problem and is solved optimally for minimax criterion. Thanks to the frequency invariant characteristic, traditional narrow band adaptive beamforming algorithms such as minimum variance beamforming (MVB) can be applied to the FI UCSA. Also, traditional narrow band 2-D direction of arrival (DOA) estimation algorithms such as unitary ESPRIT can be extended to broadband DOA estimation using FI UCSA. Simulation results show that the proposed adaptive beamformer using FI UCSA can obtain a higher output signal to inference plus noise ratio over the conventional tapped-delay line approach. Simulation results also show that FI UCSA has uniform beampattern and resolution around 360°in both azimuth and elevation angles, unlike FI uniform concentric circular array. The usefulness of the proposed UCSA-FIB in broadband 2-D DOA estimation is also verified by computer simulation. © Springer Science+Business Media, LLC 2007.
Persistent Identifierhttp://hdl.handle.net/10722/73741
ISSN
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChen, HHen_HK
dc.contributor.authorChan, SCen_HK
dc.date.accessioned2010-09-06T06:54:19Z-
dc.date.available2010-09-06T06:54:19Z-
dc.date.issued2007en_HK
dc.identifier.citationJournal Of Vlsi Signal Processing Systems For Signal, Image, And Video Technology, 2007, v. 46 n. 1, p. 15-34en_HK
dc.identifier.issn1387-5485en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73741-
dc.description.abstractThis paper proposes a new digital beamformer for uniform concentric spherical array (UCSA) 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 network. It is shown that the far field pattern of the array is determined by a set of weights and it is approximately invariant over a wide range of frequencies. FI UCSAs are electronic steerable in both the azimuth and elevation angles, unlike their concentric circular array counterpart. The frequency invariant characteristic of the FI UCSA also makes it possible to design separately the compensation network and beamformer weighting coefficients. The design of the compensation network is formulated as a second order cone programming (SOCP) problem and is solved optimally for minimax criterion. Thanks to the frequency invariant characteristic, traditional narrow band adaptive beamforming algorithms such as minimum variance beamforming (MVB) can be applied to the FI UCSA. Also, traditional narrow band 2-D direction of arrival (DOA) estimation algorithms such as unitary ESPRIT can be extended to broadband DOA estimation using FI UCSA. Simulation results show that the proposed adaptive beamformer using FI UCSA can obtain a higher output signal to inference plus noise ratio over the conventional tapped-delay line approach. Simulation results also show that FI UCSA has uniform beampattern and resolution around 360°in both azimuth and elevation angles, unlike FI uniform concentric circular array. The usefulness of the proposed UCSA-FIB in broadband 2-D DOA estimation is also verified by computer simulation. © Springer Science+Business Media, LLC 2007.en_HK
dc.languageengen_HK
dc.publisherSpringer New York LLC. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=0922-5773en_HK
dc.relation.ispartofJournal of VLSI Signal Processing Systems for Signal, Image, and Video Technologyen_HK
dc.subjectArray processingen_HK
dc.subjectBroadband 2-D DOA estimationen_HK
dc.subjectBroadband adaptive beamformingen_HK
dc.subjectDesign methoden_HK
dc.subjectFrequency invarianten_HK
dc.subjectSOCPen_HK
dc.subjectUniform concentric spherical arraysen_HK
dc.titleAdaptive beamforming and DOA estimation using uniform concentric spherical arrays with frequency invariant characteristicsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0922-5773&volume= 46 no 1&spage=pp. 15&epage=34&date=2007&atitle=Adaptive+beamforming+and+DOA+estimation+using+uniform+concentric+spherical+arrays+with+frequency+invariant+characteristicsen_HK
dc.identifier.emailChan, SC:scchan@eee.hku.hken_HK
dc.identifier.authorityChan, SC=rp00094en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s11265-006-0005-xen_HK
dc.identifier.scopuseid_2-s2.0-33947250711en_HK
dc.identifier.hkuros140413en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33947250711&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume46en_HK
dc.identifier.issue1en_HK
dc.identifier.spage15en_HK
dc.identifier.epage34en_HK
dc.identifier.isiWOS:000244954900002-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridChen, HH=35188507600en_HK
dc.identifier.scopusauthoridChan, SC=13310287100en_HK
dc.identifier.citeulike1228945-

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