Optimization of the Receiving Orientation Angle for Zero-Forcing Precoding in VLC

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dc.contributor.author Morales Céspedes, Máximo
dc.contributor.author Haas, Harald
dc.contributor.author García-Armada, Ana
dc.date.accessioned 2021-05-12T09:26:15Z
dc.date.available 2021-05-12T09:26:15Z
dc.date.issued 2021-03-01
dc.identifier.bibliographicCitation IEEE Communications Letters, (2021), 25(3), p.: 921-925.
dc.identifier.issn 1089-7798
dc.identifier.uri http://hdl.handle.net/10016/32606
dc.description.abstract We study the performance of linear zero-forcing (ZF) precoding in multiuser multiple-input single-output visible light communications (VLC) when we are able to select the receiving orientation angle (ROA) of each user. For radio-frequency communications, the non-line-of-sight rich scattering environment usually ensures the linear independence among user's channels. However, this condition is less likely to happen in VLC systems, degrading the performance of ZF precoding. In this work, we propose a variable ROA (vROA) photodetector able to modify its orientation vector in order to generate semi-orthogonal channel responses among users. We derive the algorithm for determining the orientation of the vROA photodetector of each user, obtaining optimal and suboptimal solutions with high and low complexity, respectively. Simulation results show that the performance of ZF precoding is improved considerably by managing the users ROA.
dc.description.sponsorship This work has been supported by the Spanish National Project TERESAADA (TEC2017-90093-C3-2-R) (MINECO/AEI/FEDER, UE) and the research project GEOVEOLUZ-CM-UC3M.
dc.format.extent 5
dc.language.iso eng
dc.publisher IEEE
dc.rights © 2020 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.
dc.subject.other Visible light communications
dc.subject.other Multiuser multiple-input single-output
dc.subject.other Zero forcing
dc.subject.other Optical channel
dc.title Optimization of the Receiving Orientation Angle for Zero-Forcing Precoding in VLC
dc.type article
dc.description.status Publicado
dc.subject.eciencia Telecomunicaciones
dc.identifier.doi https://doi.org/10.1109/LCOMM.2020.3038027
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. TEC2017-90093-C3-2-R/TERESAADA
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 921
dc.identifier.publicationissue 3
dc.identifier.publicationlastpage 925
dc.identifier.publicationtitle IEEE COMMUNICATIONS LETTERS
dc.identifier.publicationvolume 25
dc.identifier.uxxi AR/0000026850
dc.contributor.funder Ministerio de Economía y Competitividad (España)
dc.contributor.funder Universidad Carlos III de Madrid
dc.affiliation.dpto UC3M. Departamento de Teoría de la Señal y Comunicaciones
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Comunicaciones
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