Overhead and spectral efficiency of pilot-assisted interference alignment in time-selective fading channels
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- dc.contributor.author Mungara, Ratheesh K.ca
- dc.contributor.author George, Geordieca
- dc.contributor.author Lozano Solsona, Angelca
- dc.date.accessioned 2015-04-13T08:34:46Z
- dc.date.available 2015-04-13T08:34:46Z
- dc.date.issued 2014ca
- dc.description.abstract The spectral efficiency achievable by IA (interfer-/nence alignment) in a/nK/n-user MIMO (multiple-input multiple-/noutput) interference channel is studied in the face of time-/nselective continuous fading explicitly estimated through pilot-/nsymbol observations. The robustness of IA in such operationally/nrelevant conditions is assessed through a joint optimization/nof the pilot overhead and the IA update interval, which are/ncharacterized—in high-power conditions—as solutions of a fixed-/npoint equation. Variations of the formulation are given for/nboth FDD (frequency-division duplexing) and TDD (time-division/nduplexing), the former requiring explicit feedback of the fading/nestimates and the latter relying on fading reciprocity. For the/nFDD variation, analog feedback is considered. In addition to/narbitrary numbers of users and antennas, and arbitrary tem-/nporal fading correlation functions, the derivations accommodate/nforward and reverse links with asymmetric power levels.en
- dc.description.sponsorship This work was supported by the European Project/nFET 265578 “HIATUS” and by the MINNECO Project TEC2012-34642.
- dc.format.mimetype application/pdfca
- dc.identifier.citation Mungara R, George G, Lozano A. Overhead and spectral efficiency of pilot-assisted interference alignment in time-selective fading channels. IEEE Transactions on Wireless Communications. 2014 Sep 08; 13(9): 4884-95. DOI 10.1109/TWC.2014.2327217ca
- dc.identifier.doi http://dx.doi.org/10.1109/TWC.2014.2327217
- dc.identifier.issn 1536-1276ca
- dc.identifier.uri http://hdl.handle.net/10230/23408
- dc.language.iso engca
- dc.publisher Institute of Electrical and Electronics Engineers (IEEE)ca
- dc.relation.ispartof IEEE Transactions on Wireless Communications. 2014 Sep 08; 13(9): 4884-95
- dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/265578
- dc.relation.projectID info:eu-repo/grantAgreement/ES/3PN/TEC2012-34642
- dc.rights © 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works./nThe final published article can be found at http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6822579ca
- dc.rights.accessRights info:eu-repo/semantics/openAccessca
- dc.subject.keyword Interference alignmenten
- dc.subject.keyword Time-selective fadingen
- dc.subject.keyword Pilot-assisted transmissionen
- dc.subject.keyword Spectral efficiencyen
- dc.subject.keyword Pilot overheaden
- dc.subject.keyword Precoder update intervalen
- dc.title Overhead and spectral efficiency of pilot-assisted interference alignment in time-selective fading channelsca
- dc.type info:eu-repo/semantics/articleca
- dc.type.version info:eu-repo/semantics/acceptedVersionca