Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/52488
Campo DC Valoridioma
dc.contributor.authorGonzález, Oswaldoen_US
dc.contributor.authorGuerra-Medina, Marcos F.en_US
dc.contributor.authorMartín, Inocencio R.en_US
dc.contributor.authorDelgado, Franciscoen_US
dc.contributor.authorPérez-Jiménez, Rafaelen_US
dc.contributor.otherPEREZ-JIMENEZ, RAFAEL
dc.contributor.otherMartin, I
dc.contributor.otherGonzalez, Oswaldo
dc.date.accessioned2018-11-27T13:23:13Z-
dc.date.available2018-11-27T13:23:13Z-
dc.date.issued2016en_US
dc.identifier.issn1943-0620en_US
dc.identifier.urihttp://hdl.handle.net/10553/52488-
dc.description.abstractThis paper proposes applying Walsh-Hadamard transform spreading (WHTS) in conjunction with space-division multiple access (SDMA) in an orthogonal frequency-division multiplexing (OFDM) system to provide enhanced multi-user downlink capability in visible light communication (VLC) scenarios. VLC environments are characterized by strong interference from the emissions of adjacent lamps. Thus, SDMA-OFDM schemes can be applied to enable multi-user capability while ensuring a highly efficient use of the limited available bandwidth. However, these SDMA-OFDM systems can only provide multiple access for a small number of users whenever there is enough channel diversity to separate the users' information. This is the case, for example, when each single user is associated with a specific emitting lamp and angle-diversity receiving techniques are applied. However, to accommodate a greater number of users requires a user's distribution in the frequency domain. In this sense, the proposed Walsh-Hadamard transform spreading scheme provides a fair assignment of the available subcarriers among the different users leading to an identical throughput and bit error rate (BER) for users allocated to the same emitting lamp. This BER is also controllable by means of an adaptive throughput mechanism. The numerical results show that the proposed adaptive WHTS-assisted SDMA-OFDM system in a full-user scenario presents a similar performance to that of an adaptive SDMA-OFDM system irrespective of the number of users per lamp, while providing enhanced multi-user capability. Finally, an adaptive algorithm for resource allocation is evaluated, demonstrating a high degree of satisfaction (regarding demanded data rates) when large numbers of users are simultaneously served.en_US
dc.languageengen_US
dc.relation.ispartofJournal of Optical Communications and Networkingen_US
dc.sourceJournal of Optical Communications and Networking[ISSN 1943-0620],v. 8 (7494887), p. 427-440en_US
dc.subject33 Ciencias tecnológicasen_US
dc.subject.otherAdaptive modulationen_US
dc.subject.otherOrthogonal frequency-division multiplexing (OFDM)en_US
dc.subject.otherSpace-division multiple access (SDMA)en_US
dc.subject.otherVisible light communications (VLCs)en_US
dc.subject.otherWalsh-Hadamard transform (WHT)en_US
dc.titleAdaptive WHTS-assisted SDMA-OFDM scheme for fair resource allocation in multi-user visible light communicationsen_US
dc.typeinfo:eu-repo/semantics/Articlees
dc.typeArticlees
dc.identifier.doi10.1364/JOCN.8.000427
dc.identifier.scopus84976443458
dc.identifier.isi000379695600008
dcterms.isPartOfJournal Of Optical Communications And Networking
dcterms.sourceJournal Of Optical Communications And Networking[ISSN 1943-0620],v. 8 (6), p. 427-440
dc.contributor.authorscopusid7102080274
dc.contributor.authorscopusid55022698900
dc.contributor.authorscopusid7401825485
dc.contributor.authorscopusid55930039200
dc.contributor.authorscopusid56044417600
dc.description.lastpage440-
dc.identifier.issue6-
dc.description.firstpage427-
dc.relation.volume8-
dc.investigacionIngeniería y Arquitecturaen_US
dc.type2Artículoen_US
dc.identifier.wosWOS:000379695600008
dc.contributor.daisngid1367980
dc.contributor.daisngid7895933
dc.contributor.daisngid123740
dc.contributor.daisngid30333414
dc.contributor.daisngid258015
dc.contributor.daisngid618868
dc.identifier.investigatorRIDM-5128-2014
dc.identifier.investigatorRIDD-6866-2013
dc.identifier.investigatorRIDE-5503-2017
dc.contributor.wosstandardWOS:Gonzalez, O
dc.contributor.wosstandardWOS:Guerra-Medina, MF
dc.contributor.wosstandardWOS:Martin, IR
dc.contributor.wosstandardWOS:Delgado, F
dc.contributor.wosstandardWOS:Perez-Jimenez, R
dc.date.coverdateJunio 2016
dc.identifier.ulpgces
dc.description.sjr0,621
dc.description.jcr2,261
dc.description.sjrqQ1
dc.description.jcrqQ2
dc.description.scieSCIE
item.grantfulltextnone-
item.fulltextSin texto completo-
crisitem.author.deptGIR IUNAT: Fotocatálisis y espectroscopía para aplicaciones medioambientales.-
crisitem.author.deptIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.deptDepartamento de Química-
crisitem.author.deptGIR IDeTIC: División de Redes y Servicios Telemáticos-
crisitem.author.deptIU para el Desarrollo Tecnológico y la Innovación-
crisitem.author.deptDepartamento de Ingeniería Telemática-
crisitem.author.deptGIR IDeTIC: División de Fotónica y Comunicaciones-
crisitem.author.deptIU para el Desarrollo Tecnológico y la Innovación-
crisitem.author.deptDepartamento de Señales y Comunicaciones-
crisitem.author.orcid0000-0003-0876-8121-
crisitem.author.orcid0000-0002-7262-7633-
crisitem.author.orcid0000-0002-8849-592X-
crisitem.author.parentorgIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.parentorgIU para el Desarrollo Tecnológico y la Innovación-
crisitem.author.parentorgIU para el Desarrollo Tecnológico y la Innovación-
crisitem.author.fullNameGonzález Díaz, Oscar Manuel-
crisitem.author.fullNameDelgado Rajó, Francisco Alberto-
crisitem.author.fullNamePérez Jiménez, Rafael-
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