Distributed downlink beamforming with cooperative base stations

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dc.citation.epage5499en_US
dc.citation.issueNumber12en_US
dc.citation.spage5491en_US
dc.citation.volumeNumber54en_US
dc.contributor.authorNg, B. L.en_US
dc.contributor.authorEvans, J. S.en_US
dc.contributor.authorHanly, S. V.en_US
dc.contributor.authorAktas, D.en_US
dc.date.accessioned2016-02-08T10:06:03Z
dc.date.available2016-02-08T10:06:03Z
dc.date.issued2008en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractIn this paper, we consider multicell processing on the downlink of a cellular network to accomplish "macrodiversity" transmit beamforming. The particular downlink beamformer structure we consider allows a recasting of the downlink beamforming problem as a virtual linear mean square error (LMMSE) estimation problem. We exploit the structure of the channel and develop distributed beamforming algorithms using local message passing between neighboring base stations. For 1-D networks, we use the Kalman smoothing framework to obtain a forward-backward beamforming algorithm. We also propose a limited extent version of this algorithm that shows that the delay need not grow with the size of the network in practice. For 2-D cellular networks, we remodel the network as a factor graph and present a distributed beamforming algorithm based on the sum-product algorithm. Despite the presence of loops in the factor graph, the algorithm produces optimal results if convergence occurs.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T10:06:03Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2008en
dc.identifier.doi10.1109/TIT.2008.2006426en_US
dc.identifier.eissn1557-9654
dc.identifier.issn0018-9448
dc.identifier.urihttp://hdl.handle.net/11693/22887
dc.language.isoEnglishen_US
dc.publisherInstitute of Electrical and Electronics Engineersen_US
dc.relation.isversionofhttp://doi.org/10.1109/TIT.2008.2006426en_US
dc.source.titleIEEE Transactions on Information Theoryen_US
dc.subjectCooperative base stationsen_US
dc.subjectDistributed algorithmen_US
dc.subjectDownlink beamformingen_US
dc.subjectKalman smoothingen_US
dc.subjectLinear mean square error (LMMSE)en_US
dc.subjectLocalized interferenceen_US
dc.subjectMessage passingen_US
dc.subjectMulticell processingen_US
dc.subjectMultiple-input-multiple-output (MIMO)en_US
dc.subjectSum-product algorithmen_US
dc.titleDistributed downlink beamforming with cooperative base stationsen_US
dc.typeArticleen_US

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