Short-Term Power Constrained Cell-Free Massive-MIMO Over Spatially Correlated Ricean Fading

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Show simple item record Femenias, Guillem Riera-Palou, Felip Álvarez Polegre, Alberto García-Armada, Ana 2021-05-31T09:24:21Z 2021-05-31T09:24:21Z 2020-12
dc.identifier.bibliographicCitation Femenias, G., Riera-Palou, F., Alvarez-Polegre, A. & Garcia-Armada, A. (2020). Short-Term Power Constrained Cell-Free Massive-MIMO Over Spatially Correlated Ricean Fading. IEEE Transactions on Vehicular Technology, 69(12), pp. 15200–15215.
dc.identifier.issn 0018-9545
dc.description.abstract This paper considers short-term power constrained cell-free massive multiple-input multiple-output (MIMO) scenarios where a large set of multi-antenna access points (APs) provide service to a group of single-antenna mobile stations (MSs) on a spatially correlated multipath environment. Based on a probabilistic approach, the spatially correlated propagation links are modeled using either Ricean or Rayleigh fading channel models that combine a deterministic line-of-sight (LOS) propagation path with a small-scale fading caused by non-line-of-sight (NLOS) multipath propagation. Assuming the use of minimum mean square error (MMSE) channel estimates, closed-form expressions for the downlink (DL) achievable spectral efficiency of a cellfree massive MIMO network with short-term power constraints (i.e., a vector normalized conjugate beamformer (NCB)) are derived and benchmarked against that provided by the conventional cell-free massive MIMO network with long-term power constraints (i.e., the conventional conjugate beamforming (CB)). These expressions, encompassing the effects of spatial antenna correlation, Ricean/Rayleigh fading and pilot contamination, are then used to derive both pragmatic and optimal max-min peruser power allocation strategies and to gain theoretical insight on the performance advantage provided by the use of short-term power constraints instead of the conventional long-term power constrained approach.
dc.description.sponsorship This work was supported in part by the Agencia Estatal de Investigacion (AEI) of Spain under Grants TEC2017-90093-C3-2-R and TEC2017-90093-C3-3-R, and in part by the European Regional Development Fund (ERDF) funds of the European Union (EU) (AEI/FEDER, UE).
dc.format.extent 16
dc.language.iso eng
dc.publisher IEEE
dc.rights © 2020, IEEE
dc.subject.other Cell-free massive MIMO
dc.subject.other Favourable propagation
dc.subject.other Hardening ratio
dc.subject.other Power control
dc.subject.other Spatially correlated Ricean fading
dc.subject.other Spectral efficiency
dc.title Short-Term Power Constrained Cell-Free Massive-MIMO Over Spatially Correlated Ricean Fading
dc.type article
dc.subject.eciencia Telecomunicaciones
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. TEC2017-90093-C3-2-R
dc.relation.projectID Gobierno de España. TEC2017-90093-C3-3-R
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 15200
dc.identifier.publicationissue 12
dc.identifier.publicationlastpage 15215
dc.identifier.publicationtitle IEEE Transactions on Vehicular Technology
dc.identifier.publicationvolume 69
dc.identifier.uxxi AR/0000027788
dc.contributor.funder Ministerio de Economía y Competitividad (España)
dc.affiliation.dpto UC3M. Departamento de Teoría de la Señal y Comunicaciones
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Comunicaciones
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