Publication:
A novel NOMA solution with RIS partitioning

dc.contributor.departmentDepartment of Electrical and Electronics Engineering
dc.contributor.departmentGraduate School of Sciences and Engineering
dc.contributor.kuauthorBaşar, Ertuğrul
dc.contributor.kuauthorKhaleel, Aymen
dc.contributor.schoolcollegeinstituteCollege of Engineering
dc.contributor.schoolcollegeinstituteGRADUATE SCHOOL OF SCIENCES AND ENGINEERING
dc.date.accessioned2024-11-09T12:40:49Z
dc.date.issued2022
dc.description.abstractReconfigurable intelligent surface (RIS) empowered communications with non-orthogonal multiple access (NOMA) has recently become an appealing research direction for nextgeneration wireless communications. In this paper, we propose a novel NOMA solution with RIS partitioning, where we aim to enhance the spectrum efficiency by improving the ergodic rate of all users, and to maximize the user fairness. In the proposed system, we distribute the physical resources among users such that the base station (BS) and RIS are dedicated to serve different clusters of users. Furthermore, we formulate an RIS partitioning optimization problem to slice the RIS elements between the users such that the user fairness is maximized. The formulated problem is shown to be a non-convex and non-linear integer programming (NLIP) problem with a combinatorial feasible set, which is challenging to solve. Therefore, we exploit the structure of the problem to bound its feasible set and obtain a sub-optimal solution by sequentially applying three efficient search algorithms. Furthermore, we derive exact and asymptotic expressions for the outage probability. Simulation results clearly indicate the superiority of the proposed system over the considered benchmark systems in terms of ergodic sum-rate, outage probability, and user fairness performance.
dc.description.fulltextYES
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.issue1
dc.description.openaccessYES
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuTÜBİTAK
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TÜBİTAK)
dc.description.versionAuthor's final manuscript
dc.description.volume16
dc.identifier.doi10.1109/JSTSP.2021.3127725
dc.identifier.eissn1941-0484
dc.identifier.embargoNO
dc.identifier.filenameinventorynoIR03949
dc.identifier.issn1932-4553
dc.identifier.quartileQ1
dc.identifier.scopus2-s2.0-85119000421
dc.identifier.urihttps://doi.org/10.1109/JSTSP.2021.3127725
dc.identifier.wos753437600010
dc.keywordsReconfigurable intelligent surface (RIS)
dc.keywordsNonorthogonal multiple access (NOMA)
dc.keywordsUser fairness
dc.keywordsSum-rate
dc.language.isoeng
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relation.grantno1.79769313486232E+308
dc.relation.ispartofIEEE Journal of Selected Topics in Signal Processing
dc.relation.urihttp://cdm21054.contentdm.oclc.org/cdm/ref/collection/IR/id/10816
dc.subjectEngineering
dc.titleA novel NOMA solution with RIS partitioning
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorBaşar, Ertuğrul
local.contributor.kuauthorKhaleel, Aymen
local.publication.orgunit1College of Engineering
local.publication.orgunit1GRADUATE SCHOOL OF SCIENCES AND ENGINEERING
local.publication.orgunit2Department of Electrical and Electronics Engineering
local.publication.orgunit2Graduate School of Sciences and Engineering
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