Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/28765
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dc.contributor.authorMagueta, Robertopt_PT
dc.contributor.authorTeodoro, Sarapt_PT
dc.contributor.authorCastanheira, Danielpt_PT
dc.contributor.authorSilva, Adãopt_PT
dc.contributor.authorDinis, Ruipt_PT
dc.contributor.authorGameiro, Atíliopt_PT
dc.date.accessioned2020-06-30T17:52:41Z-
dc.date.available2020-06-30T17:52:41Z-
dc.date.issued2019-08-15-
dc.identifier.issn2076-3417pt_PT
dc.identifier.urihttp://hdl.handle.net/10773/28765-
dc.description.abstractThis paper considers a multiuser broadband uplink massive multiple input multiple output (MIMO) millimeter-wave (mmWave) system. The constant envelope orthogonal frequency division multiplexing (CE-OFDM) is adopted as a modulation technique to allow an efficient power amplification, fundamental for mmWave based systems. Furthermore, a hybrid architecture is considered at the user terminals (UTs) and base station (BS) to reduce the high cost and power consumption required by a full-digital architecture, which has a radio frequency (RF) chain per antenna. Both the design of the UT’s precoder and base station equalizer are considered in this work. With the aim of maximizing the beamforming gain between each UT and the BS, the precoder analog coefficients are computed as a function of the average angles of departure (AoD), which are assumed to be known at the UTs. At the BS, the analog part is derived by assuming a system with no multi-user interference. Then, a per carrier basis nonlinear/iterative multi-user equalizer, based on the iterative block decision feedback equalization (IB-DFE) principle is designed, to explicitly remove both the multi-user and residual inter carrier interferences, not tackled in the analog part. The equalizer design metric is the sum of the mean square error (MSE) of all subcarriers, whose minimization is shown to be equivalent to the minimization of a weighted error between the hybrid and the full digital equalizer matrices. The results show that the proposed hybrid multi-user equalizer has a performance close to the fully digital counterpart.pt_PT
dc.language.isoengpt_PT
dc.publisherMDPIpt_PT
dc.relation02/SAICT/2017pt_PT
dc.relationUID/EEA/50008/2019pt_PT
dc.relationSFRH/BD/129395/2017pt_PT
dc.rightsopenAccesspt_PT
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectCE-OFDMpt_PT
dc.subjectHybrid analog/digital architecturespt_PT
dc.subjectMassive MIMOpt_PT
dc.subjectmmWave communicationspt_PT
dc.subjectNonlinear equalizerpt_PT
dc.titleMultiuser equalizer for hybrid massive MIMO mmWave CE-OFDM systemspt_PT
dc.typearticlept_PT
dc.description.versionpublishedpt_PT
dc.peerreviewedyespt_PT
degois.publication.issue16pt_PT
degois.publication.titleApplied Sciencespt_PT
degois.publication.volume9pt_PT
dc.identifier.doi10.3390/app9163363pt_PT
dc.identifier.essn2076-3417pt_PT
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IT - Artigos

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