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dc.contributorRiba Sagarra, Jaume
dc.contributor.authorSantagiustina, Francesco Bruno Leonardo
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.date.accessioned2019-09-26T21:09:08Z
dc.date.available2019-09-26T21:09:08Z
dc.date.issued2019-09
dc.identifier.urihttp://hdl.handle.net/2117/168787
dc.description.abstractCellular communications exploiting the mmWaves frequency range are com- ing within our technological reach. However the specificities of propagation at these frequencies calls for new transmission schemes. Concerning the downlink there are signs that opportunistic beamforming may be an effec- tive solution. This thesis aims to show that in mmWaves channels, schemes based on randomly-directional beamforming allow to harness both the spatial multiplexing and multiuser diversity characterizing the broadcast channel by using only limited feedback and a simple transmitter architecture. It is well- known that performances of random beamforming schemes become optimal when the number of users tends to infinity. Hence, the number of necessary users with respect to the number of transmitting antennas is investigated and the necessity of a linear relation between the two is confirmed. Opportunis- tic beamforming is furthermore analysed under the aspect of fairness. The possibility to combine it with proportional-fair scheduling with only a small sum-rate loss is shown. Finally, the allocation of multiple users per beam is considered and the advantage of NOMA over OMA under the point of view of fairness is displayed.
dc.language.isoeng
dc.publisherUniversitat Politècnica de Catalunya
dc.rightsS'autoritza la difusió de l'obra mitjançant la llicència Creative Commons o similar 'Reconeixement-NoComercial- SenseObraDerivada'
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.lcshWireless communication systems
dc.subject.lcshAntennas (Electronics)
dc.subject.otherBeamforming
dc.subject.othermmWaves
dc.subject.otherOpportunistic
dc.subject.othermultiuser
dc.subject.otherrandom
dc.subject.otherfeedback
dc.titleMultiuser Random Beamforming in Millimeter-Wave Channels
dc.title.alternativeMultiuser random beamforming in mmWave channels
dc.typeMaster thesis
dc.subject.lemacComunicació sense fil, Sistemes de
dc.subject.lemacAntenes (Electrònica)
dc.identifier.slugETSETB-230.145667
dc.rights.accessOpen Access
dc.date.updated2019-09-17T05:53:17Z
dc.audience.educationlevelMàster
dc.audience.mediatorEscola Tècnica Superior d'Enginyeria de Telecomunicació de Barcelona
dc.audience.degreeMÀSTER UNIVERSITARI EN ENGINYERIA DE TELECOMUNICACIÓ (Pla 2013)


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Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain