Power-Efficient Wireless OFDMA Using Limited-Rate Feedback
| dc.contributor.author | Marques, Antonio G. | |
| dc.contributor.author | Giannakis, Georgios B. | |
| dc.contributor.author | Digham, Fadel F. | |
| dc.contributor.author | Ramos, Javier | |
| dc.date.accessioned | 2009-01-20T18:56:40Z | |
| dc.date.available | 2009-01-20T18:56:40Z | |
| dc.date.issued | 2008-02-01 | |
| dc.description.abstract | Emerging 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.departamento | Teoría de la Señal y Comunicaciones | |
| dc.description.sponsorship | The 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.identifier.citation | IEEE Transac. on Wireless Communications, vol. 7, no. 2, pp. 685-696 | es |
| dc.identifier.issn | Digital Object Identifier 10.1109/TWC.2008.060629. | |
| dc.identifier.other | Digital Object Identifier 10.1109/TWC.2008.060629 | |
| dc.identifier.uri | http://hdl.handle.net/10115/1809 | |
| dc.language.iso | en | es |
| dc.publisher | IEEE | es |
| dc.rights | Atribución-NoComercial-SinDerivadas 3.0 España | * |
| dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ | * |
| dc.subject | Telecomunicaciones | es |
| dc.subject.unesco | 3325 Tecnología de las Telecomunicaciones | es |
| dc.title | Power-Efficient Wireless OFDMA Using Limited-Rate Feedback | es |
| dc.type | info:eu-repo/semantics/article | es |