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dc.contributor.authorPapazafeiropoulos, Anastasios K.
dc.date.accessioned2018-03-02T12:29:35Z
dc.date.available2018-03-02T12:29:35Z
dc.date.issued2017-02-01
dc.identifier.citationPapazafeiropoulos , A K 2017 , ' Impact of General Channel Aging Conditions on the Downlink Performance of Massive MIMO ' , IEEE Transactions on Vehicular Technology , vol. 66 , no. 2 , 7473866 , pp. 1428-1442 . https://doi.org/10.1109/TVT.2016.2570742
dc.identifier.issn0018-9545
dc.identifier.otherPURE: 13265220
dc.identifier.otherPURE UUID: 056080a6-9807-4ee7-8fc5-808182f234de
dc.identifier.otherScopus: 85013127812
dc.identifier.otherORCID: /0000-0003-1841-6461/work/62751638
dc.identifier.urihttp://hdl.handle.net/2299/19857
dc.description© 2016 IEEE Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
dc.description.abstractRecent works have identified massive multiple-input multiple-output (MIMO) as a key technology for achieving substantial gains in spectral and energy efficiency. Additionally, the turn to low-cost transceivers, being prone to hardware impairments, is the most effective and attractive way for cost-efficient applications concerning massive MIMO systems. In this context, the impact of channel aging, which severely affects performance, is investigated herein by considering a generalized model. Specifically, we show that both Doppler shift due to the users' relative movement, as well as phase noise due to noisy local oscillators, contribute to channel aging. To this end, we first propose a joint model, encompassing both effects, to investigate the performance of a massive MIMO system based on the inevitable time-varying nature of realistic mobile communications. Then, we derive the deterministic equivalents for the signal-to-noise-and-interference ratios (SINRs) with maximum ratio transmission (MRT) and regularized zero-forcing (RZF) precoding. Our analysis not only demonstrates a performance comparison between MRT and RZF under these conditions but, most importantly, also reveals interesting properties regarding the effects of user mobility and phase noise. In particular, the large antenna limit behavior profoundly depends on both effects, but the burden due to user mobility is much more detrimental than phase noise even for moderate user velocities (≈ 30 km/h), whereas the negative impact of phase noise is noteworthy at lower mobility conditions. Moreover, massive MIMO systems are favorable even in general channel aging conditions. Nevertheless, we demonstrate that the transmit power of each user to maintain a certain quality of service can be scaled down, at most, by 1√M (M is the number of base station antennas), which indicates that the joint effects of phase noise and user mobility do not degrade the power scaling law but only the achievable sum-rate.en
dc.format.extent15
dc.language.isoeng
dc.relation.ispartofIEEE Transactions on Vehicular Technology
dc.rightsOpen
dc.subjectChannel estimation
dc.subjectDoppler shift
dc.subjecthardware impairments
dc.subjectlinear precoding
dc.subjectmassive multiple-input multiple-output (MIMO)
dc.subjectphase noise
dc.subjectTime-division duplex (TDD) systems
dc.subjectAutomotive Engineering
dc.subjectAerospace Engineering
dc.subjectApplied Mathematics
dc.subjectElectrical and Electronic Engineering
dc.titleImpact of General Channel Aging Conditions on the Downlink Performance of Massive MIMOen
dc.contributor.institutionCommunications and Intelligent Systems
dc.contributor.institutionCentre for Engineering Research
dc.contributor.institutionSchool of Engineering and Technology
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85013127812&partnerID=8YFLogxK
dc.relation.schoolSchool of Engineering and Technology
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2017-02-01
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1109/TVT.2016.2570742
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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