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Power-Efficient Wireless OFDMA Using Limited-Rate Feedback

dc.contributor.authorMarques, Antonio G.
dc.contributor.authorGiannakis, Georgios B.
dc.contributor.authorDigham, Fadel F.
dc.contributor.authorRamos, Javier
dc.date.accessioned2009-01-20T18:56:40Z
dc.date.available2009-01-20T18:56:40Z
dc.date.issued2008-02-01
dc.identifier.citationIEEE Transac. on Wireless Communications, vol. 7, no. 2, pp. 685-696es
dc.identifier.issnDigital Object Identifier 10.1109/TWC.2008.060629.
dc.identifier.otherDigital Object Identifier 10.1109/TWC.2008.060629
dc.identifier.urihttp://hdl.handle.net/10115/1809
dc.description.abstractEmerging applications involving low-cost wireless sensor networks motivate well optimization of multi-user orthogonal frequency-division multiple access (OFDMA) in the power-limited regime. In this context, the present paper relies on limited-rate feedback (LRF) sent from the access point to terminals to minimize the total average transmit-power under individual average rate and error probability constraints. Along with the characterization of optimal bit, power and subcarrier allocation policies based on LRF, suboptimal yet simple schemes are developed for channel quantization. The novel algorithms proceed in two phases: (i) an off-line phase to construct the channel quantizer as well as the rate and power codebooks with moderate complexity; and (ii) an on-line phase to obtain, based on quantized channel state information, the optimum, rate, power and user-subcarrier allocation with linear complexity. Numerical examples corroborate the analytical claims and reveal that significant power savings result even with suboptimal schemes based on practically affordable LRF.es
dc.description.sponsorshipThe work in this paper was supported by the US ARL under the CTA Program, Cooperative Agreement No. DAAD19-01-2-0011; by USDoD ARO grant No. W911NF-05-1-0283; by Spanish Government grant No. TEC2005-06766-C03-01/TCM, and by the Government of C.A. Madrid grant No. P-TIC-000223-0505.es
dc.language.isoenes
dc.publisherIEEEes
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subjectTelecomunicacioneses
dc.titlePower-Efficient Wireless OFDMA Using Limited-Rate Feedbackes
dc.typeinfo:eu-repo/semantics/articlees
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses
dc.subject.unesco3325 Tecnología de las Telecomunicacioneses
dc.description.departamentoTeoría de la Señal y Comunicaciones


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