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dc.contributor.authorTorrellas, Marc
dc.contributor.authorAgustín de Dios, Adrián
dc.contributor.authorVidal Manzano, José
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.date.accessioned2017-02-14T12:34:54Z
dc.date.available2017-02-14T12:34:54Z
dc.date.issued2016-12-01
dc.identifier.citationTorrellas, M., Agustin, A., Vidal, J. Achievable DoF-delay trade-offs for the K-user MIMO interference channel with delayed CSIT. "IEEE transactions on information theory", 1 Desembre 2016, vol. 62, núm. 12, p. 7030-7055.
dc.identifier.issn0018-9448
dc.identifier.urihttp://hdl.handle.net/2117/100973
dc.description©2016 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.
dc.description.abstractThe degrees of freedom (DoFs) of the K-user multiple-input multiple-output (MIMO) interference channel are studied when perfect, but delayed channel state information is available at the transmitter side (delayed CSIT). Recent works have proposed schemes improving the DoF knowledge of the interference channel, but at the cost of developing transmission involving many channel uses (long delay), thus increasing the complexity at both transmitter and receiver side. This paper proposes three linear precoding strategies, limited to at most three phases, based on the concept of interference alignment, and built upon three main ingredients: delayed CSIT precoding, user scheduling, and redundancy transmission. In this respect, the interference alignment is realized by exploiting delayed CSIT to align the interference at the non-intended receivers along the space-time domain. Moreover, a new framework is proposed where the number of transmitted symbols and duration of the phases is obtained as the solution of a maximization problem, and enabling the introduction of complexity constraints, which allows deriving the achievable DoF as a function of the transmission delay, i.e., the achievable DoF-delay trade-off. Finally, the latter part of this paper settles that the assumption of time-varying channels common along all the literature on delayed CSIT is indeed unnecessary.
dc.format.extent26 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació
dc.subject.lcshMIMO systems
dc.subject.lcshRadio--Transmitters and transmission
dc.subject.otherDelayed channel state information
dc.subject.otherInterference channel
dc.subject.otherMIMO
dc.subject.otherDegrees of freedom
dc.subject.otherInterference alignment
dc.titleAchievable DoF-delay trade-offs for the K-user MIMO interference channel with delayed CSIT
dc.typeArticle
dc.subject.lemacSistemes MIMO
dc.subject.lemacRàdio -- Transmissors i transmissió
dc.contributor.groupUniversitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions
dc.identifier.doi10.1109/TIT.2016.2616348
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://ieeexplore.ieee.org/document/7588140/
dc.rights.accessOpen Access
local.identifier.drac19697110
dc.description.versionPostprint (author's final draft)
local.citation.authorTorrellas, M.; Agustin, A.; Vidal, J.
local.citation.publicationNameIEEE transactions on information theory
local.citation.volume62
local.citation.number12
local.citation.startingPage7030
local.citation.endingPage7055


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