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dc.contributor.authorPapazafeiropoulos, Anastasios
dc.contributor.authorRatnarajah, Tharmalingam
dc.date.accessioned2018-09-08T00:18:36Z
dc.date.available2018-09-08T00:18:36Z
dc.date.issued2018-08-01
dc.identifier.citationPapazafeiropoulos , A & Ratnarajah , T 2018 , ' Rate-Splitting Robustness in Multi-Pair Massive MIMO Relay Systems ' , IEEE Transactions on Wireless Communications , vol. 17 , no. 8 , pp. 5623-5636 . https://doi.org/10.1109/TWC.2018.2847668
dc.identifier.issn1536-1276
dc.identifier.otherPURE: 15033988
dc.identifier.otherPURE UUID: 4f5dc16a-1b89-446d-8f78-719b4146dcf5
dc.identifier.otherScopus: 85049098231
dc.identifier.otherORCID: /0000-0003-1841-6461/work/62751646
dc.identifier.urihttp://hdl.handle.net/2299/20532
dc.description.abstractRelay systems improve both coverage and system capacity. Toward this direction, a full-duplex (FD) technology, being able to boost the spectral efficiency by transmitting and receiving simultaneously on the same frequency and time resources, is envisaged to play a key role in future networks. However, its benefits come at the expense of self-interference (SI) from their own transmit signal. At the same time, massive multiple-input massive multiple-output systems, bringing unconventionally many antennas, emerge as a promising technology with huge degrees-of-freedom. To this end, this paper considers a multi-pair decode-and-forward FD relay channel, where the relay station is deployed with a large number of antennas. Moreover, the rate-splitting (RS) transmission has recently been shown to provide significant performance benefits in various multi-user scenarios with imperfect channel state information at the transmitter (CSIT). Engaging the RS approach, we employ the deterministic equivalent analysis to derive the corresponding sum-rates in the presence of interferences. Initially, numerical results demonstrate the robustness of RS in half-duplex (HD) systems, since the achievable sum-rate increases without bound, i.e., it does not saturate at high signal-to-noise ratio. Next, we tackle the detrimental effect of SI in FD. In particular, and most importantly, not only FD outperforms HD, but also RS enables increasing the range of SI over which FD outperforms HD. Furthermore, increasing the number of relay station antennas, RS appears to be more efficacious due to imperfect CSIT, since SI decreases. Interestingly, increasing the number of users, the efficiency of RS worsens and its implementation becomes less favorable under these conditions. Finally, we verify that the proposed DEs, being accurate for a large number of relay station antennas, are tight approximations even for realistic system dimensions.en
dc.format.extent14
dc.language.isoeng
dc.relation.ispartofIEEE Transactions on Wireless Communications
dc.rightsOpen
dc.subjectDeterministic equivalent analysis
dc.subjectFull-duplex relaying
dc.subjectHalf-duplex relaying
dc.subjectMassive MIMO systems
dc.subjectRate-splitting
dc.subjectComputer Science Applications
dc.subjectElectrical and Electronic Engineering
dc.subjectApplied Mathematics
dc.titleRate-Splitting Robustness in Multi-Pair Massive MIMO Relay Systemsen
dc.contributor.institutionSchool of Engineering and Technology
dc.contributor.institutionCommunications and Intelligent Systems
dc.contributor.institutionCentre for Engineering Research
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85049098231&partnerID=8YFLogxK
dc.relation.schoolSchool of Engineering and Technology
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2018-08-01
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1109/TWC.2018.2847668
rioxxterms.licenseref.uriOther
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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