Overhead and spectral efficiency of pilot-assisted interference alignment in time-selective fading channels

Mungara, Ratheesh K.; George, Geordie; Lozano Solsona, Angel

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dc.contributor.author	Mungara, Ratheesh K.
dc.contributor.author	George, Geordie
dc.contributor.author	Lozano Solsona, Angel
dc.date.accessioned	2015-04-13T08:34:46Z
dc.date.available	2015-04-13T08:34:46Z
dc.date.issued	2014
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.2014.2327217
dc.identifier.issn	1536-1276
dc.identifier.uri	http://hdl.handle.net/10230/23408
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.
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/pdf
dc.language.iso	eng
dc.publisher	Institute of Electrical and Electronics Engineers (IEEE)
dc.relation.ispartof	IEEE Transactions on Wireless Communications. 2014 Sep 08; 13(9): 4884-95
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=6822579
dc.title	Overhead and spectral efficiency of pilot-assisted interference alignment in time-selective fading channels
dc.type	info:eu-repo/semantics/article
dc.identifier.doi	http://dx.doi.org/10.1109/TWC.2014.2327217
dc.subject.keyword	Interference alignment
dc.subject.keyword	Time-selective fading
dc.subject.keyword	Pilot-assisted transmission
dc.subject.keyword	Spectral efficiency
dc.subject.keyword	Pilot overhead
dc.subject.keyword	Precoder update interval
dc.relation.projectID	info:eu-repo/grantAgreement/EC/FP7/265578
dc.relation.projectID	info:eu-repo/grantAgreement/ES/3PN/TEC2012-34642
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.type.version	info:eu-repo/semantics/acceptedVersion