Cooperative RIS and STAR-RIS Assisted mMIMO Communication: Analysis and Optimization

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dc.authoridElbir, Ahmet M./0000-0003-4060-3781en_US
dc.authoridKourtessis, Pandelis/0000-0003-3392-670Xen_US
dc.authoridPAPAZAFEIROPOULOS, Anastasios/0000-0003-1841-6461en_US
dc.authoridElbir, Ahmet M./0000-0003-4060-3781en_US
dc.authoridChatzinotas, Symeon/0000-0001-5122-0001en_US
dc.authorwosidElbir, Ahmet M./X-3731-2019en_US
dc.authorwosidKourtessis, Pandelis/AAC-1458-2020en_US
dc.authorwosidElbir, Ahmet M./Q-1265-2015en_US
dc.authorwosidPAPAZAFEIROPOULOS, Anastasios/X-2625-2019en_US
dc.authorwosidChatzinotas, Symeon/D-4191-2015en_US
dc.contributor.authorPapazafeiropoulos, Anastasios
dc.contributor.authorElbir, Ahmet M.
dc.contributor.authorKourtessis, Pandelis
dc.contributor.authorKrikidis, Ioannis
dc.contributor.authorChatzinotas, Symeon
dc.date.accessioned2024-08-23T16:04:16Z
dc.date.available2024-08-23T16:04:16Z
dc.date.issued2023en_US
dc.departmentDüzce Üniversitesien_US
dc.description.abstractReconfigurable intelligent surface (RIS) has emerged as a cost-effective and promising solution to extend the wireless signal coverage and improve the performance via passive signal reflection. Different from existing works which do not account for the cooperation between RISs or do not provide full space coverage, we propose the marriage of cooperative double-RIS with simultaneously transmitting and reflecting RIS (STAR-RIS) technologies denoted as RIS/STAR-RIS under correlated Rayleigh fading conditions to assist the communication in a massive multiple-input multiple-output (mMIMO) setup. The proposed architecture is superior since it enjoys the benefits of the individual designs. We introduce a channel estimation approach of the cascaded channels with reduced overhead. Also, we obtain the deterministic equivalent (DE) of the downlink achievable sum spectral efficiency (SE) in closed form based on large-scale statistics. Notably, relied on statistical channel state information (CSI), we optimise both surfaces by means of the projected gradient ascent method (PGAM), and obtain the gradients in closed form. The proposed optimization achieves to maximise the sum SE of such a complex system, and has low complexity and low overhead since it can be performed at every several coherence intervals. Numerical results show the benefit of the proposed architecture and verify the analytical framework. In particular, we show that the RIS/STAR-RIS architecture outperforms the conventional double-RIS or its single-RIS counterparts.en_US
dc.description.sponsorshipUniversity of Hertfordshire's 5-year Vice Chancellor's Research Fellowship; National Research Fund, Luxembourg through the Project RISOTTI; European Regional Development Fund; Republic of Cyprus through the Research and Innovation Foundation [INFRASTRUCTURES/1216/0017]; European Research Council (ERC) through the European Union [819819]en_US
dc.description.sponsorshipThe work of Anastasios Papazafeiropoulos was supported by the University of Hertfordshire's 5-year Vice Chancellor's Research Fellowship. The work of Symeon Chatzinotas was supported by the National Research Fund, Luxembourg through the Project RISOTTI. This work was supported in part by the European Regional Development Fund and the Republic of Cyprus through the Research and Innovation Foundation through the Project INFRASTRUCTURES/1216/0017 (IRIDA), and in part by the European Research Council (ERC) through the European Union's Horizon 2020 Research and Innovation Programme under Grant 819819. The review of this article was coordinated by Dr. H. Zhang.en_US
dc.identifier.doi10.1109/TVT.2023.3264724
dc.identifier.endpage11989en_US
dc.identifier.issn0018-9545
dc.identifier.issn1939-9359
dc.identifier.issue9en_US
dc.identifier.startpage11975en_US
dc.identifier.urihttps://doi.org/10.1109/TVT.2023.3264724
dc.identifier.urihttps://hdl.handle.net/20.500.12684/14137
dc.identifier.volume72en_US
dc.identifier.wosWOS:001103676800069en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.publisherIeee-Inst Electrical Electronics Engineers Incen_US
dc.relation.ispartofIeee Transactions on Vehicular Technologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectDouble-RISen_US
dc.subjectsimultaneously transmitting and reflecting RISen_US
dc.subjectcorrelated Rayleigh fadingen_US
dc.subjectspectral efficiencyen_US
dc.subject6G networksen_US
dc.subjectIntelligent Reflecting Surfaceen_US
dc.subjectMassive Mimoen_US
dc.subjectChannel Estimationen_US
dc.subjectIrsen_US
dc.subjectNetworksen_US
dc.subjectCapacityen_US
dc.subjectDesignen_US
dc.titleCooperative RIS and STAR-RIS Assisted mMIMO Communication: Analysis and Optimizationen_US
dc.typeArticleen_US

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