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Channel hardening in cell-free and user-centric massive MIMO networks with spatially correlated ricean fading

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dc.affiliation.dptoUC3M. Departamento de Teoría de la Señal y Comunicacioneses
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Comunicacioneses
dc.contributor.authorÁlvarez Polegre, Alberto
dc.contributor.authorRiera Palou, Felip
dc.contributor.authorFemenias, Guillem
dc.contributor.authorGarcía-Armada, Ana
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.date.accessioned2022-07-22T09:12:22Z
dc.date.available2022-07-22T09:12:22Z
dc.date.issued2020-07-29
dc.description.abstractThe irruption of the cell-free (CF) massive multiple-input multiple-output (MIMO) network topology has meant taking one step further the concept of massive MIMO as a means to provide uniform service in large coverage areas. A key property of massive MIMO networks is channel hardening, by which the channel becomes deterministic when the number of antennas grows large enough relative to the number of serviced users, easing the signal processing and boosting the performance of simple precoders. However, in CF massive MIMO, the fulfillment of this condition depends on several aspects that are not considered in classical massive MIMO systems. In this work, we address the presence of channel hardening in both CF massive MIMO and the recently appeared user-centric (UC) approach, under a spatially correlated Ricean fading channel using distributed and cooperative precoding and combining schemes and different power control strategies for both the downlink (DL) and uplink (UL) segments. We show that the line-of-sight (LOS) component, spatially correlated antennas and UC schemes have an impact on how the channel hardens. In addition, we examine the existent gap between the estimated achievable rate and the true network performance when channel hardening is compromised. Exact closed-form expressions for both the hardening metric and achievable DL/UL rates are given as well.en
dc.description.sponsorshipThis work was supported in part by the Agencia Estatal de Investigación and Fondo Europeo de Desarrollo Regional (AEI/FEDER, UE), Ministerio de Economía y Competitividad (MINECO), Spain, through the project TERESA under Grant TEC2017-90093-C3-2-R and Grant TEC2017-90093-C3-3-R, and in part by the Spanish CDTI PID through the project OPALL5G: Optimization of Small Cells Performance in 5G NR.en
dc.format.extent19
dc.identifier.bibliographicCitationPolegre, A. A., Riera-Palou, F., Femenias, G., & Armada, A. G. (2020). Channel Hardening in Cell-Free and User-Centric Massive MIMO Networks With Spatially Correlated Ricean Fading. In IEEE Access (Vol. 8, pp. 139827–139845). Institute of Electrical and Electronics Engineers (IEEE).en
dc.identifier.doihttps://doi.org/10.1109/ACCESS.2020.3012736
dc.identifier.issn2169-3536
dc.identifier.publicationfirstpage139827
dc.identifier.publicationlastpage139845
dc.identifier.publicationtitleIEEE Accessen
dc.identifier.publicationvolume8
dc.identifier.urihttps://hdl.handle.net/10016/35523
dc.identifier.uxxiAR/0000030321
dc.language.isoengen
dc.publisherIEEEen
dc.relation.projectIDGobierno de España. TEC2017-90093-C3-2-Res
dc.relation.projectIDGobierno de España. TEC2017-90093-C3-3-Res
dc.rights© 2020 IEEEen
dc.rightsAtribución 3.0 España
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/
dc.subject.ecienciaTelecomunicacioneses
dc.subject.otherCell-freeen
dc.subject.otherMassive MIMOen
dc.subject.otherUser-centricen
dc.subject.otherCorrelated Ricean fadingen
dc.subject.otherChannel hardeningen
dc.titleChannel hardening in cell-free and user-centric massive MIMO networks with spatially correlated ricean fadingen
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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