Publication:
Efficient indexing schemes for quadrature reflection modulation in RIS-Based BackCom

dc.contributor.departmentDepartment of Electrical and Electronics Engineering
dc.contributor.departmentCoreLab (Communications Research and Innovation Laboratory)
dc.contributor.departmentGraduate School of Sciences and Engineering
dc.contributor.kuauthorBaşar, Ertuğrul
dc.contributor.kuauthorTufail, Ahmad
dc.contributor.schoolcollegeinstituteCollege of Engineering
dc.contributor.schoolcollegeinstituteGRADUATE SCHOOL OF SCIENCES AND ENGINEERING
dc.contributor.schoolcollegeinstituteLaboratory
dc.date.accessioned2025-03-06T20:58:32Z
dc.date.issued2024
dc.description.abstractBesides steering the incoming signals toward a receiver, a reconfigurable intelligent surface (RIS) can simultaneously serve as a backscatter node to communicate additional data by modulating the same signal. Quadrature reflection modulation (QRM) is a promising contender among index modulation (IM)-based techniques for implementing RIS-based backscatter communications (RIS-BackCom). In this paper, we demonstrate that the error performance of RIS-QRM heavily relies on the employed indexing scheme, which configures each RIS element into one of the two orthogonally-reflecting modes of QRM to encode the transmitted data onto the reflection pattern of RIS elements. In this context, we present an efficient guideline for designing indexing schemes that ensure the resulting channel-dependent QRM symbols are evenly spaced with maximum separation. Following this guideline, we propose two specific indexing techniques: the incremental and uniform indexing schemes, both of which substantially enhance the error performance of RIS-QRM without increasing detection complexity. We derive a closed-form expression for the bit error probability (BEP) of RIS-QRM with the incremental indexing scheme. Furthermore, we propose a low-complexity detector for RIS-BackCom systems employing RIS-QRM. Extensive computer simulations illustrate the effectiveness of our proposed schemes in improving the error performance of RIS-QRM-based BackCom systems.
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuTÜBİTAK
dc.description.sponsorshipThis study was supported by TÜBİTAK 2244 project under grant number 119C157 and Vestel Electronics. The associate editor coordinating the review of this article and approving it for publication was C. Pan.
dc.identifier.doi10.1109/TCOMM.2024.3383863
dc.identifier.eissn1558-0857
dc.identifier.grantnoTÜBİTAK 2244 project [119C157];Vestel Electronics
dc.identifier.issn0090-6778
dc.identifier.issue9
dc.identifier.quartileQ1
dc.identifier.scopus2-s2.0-85190168392
dc.identifier.urihttps://doi.org/10.1109/TCOMM.2024.3383863
dc.identifier.urihttps://hdl.handle.net/20.500.14288/27487
dc.identifier.volume72
dc.identifier.wos1319557300044
dc.keywordsIndexing
dc.keywordsReconfigurable intelligent surfaces
dc.keywordsModulation
dc.keywordsReceiving antennas
dc.keywordsSymbols
dc.keywordsRf signals
dc.keywordsGuidelines
dc.keywordsReconfigurable intelligent surface (RIS)
dc.keywordsIndex modulation (IM)
dc.keywordsQuadrature reflection modulation (QRM)
dc.keywordsBackscatter communications (BACKCOM)
dc.keywordsIndexing algorithms
dc.language.isoeng
dc.publisherInstitute of Electrical and Electronics Engineers Inc.
dc.relation.ispartofIEEE TRANSACTIONS ON COMMUNICATIONS
dc.subjectElectrical and electronics engineering
dc.subjectComputer engineering
dc.titleEfficient indexing schemes for quadrature reflection modulation in RIS-Based BackCom
dc.typeJournal Article
dspace.entity.typePublication
local.publication.orgunit1GRADUATE SCHOOL OF SCIENCES AND ENGINEERING
local.publication.orgunit1College of Engineering
local.publication.orgunit1Laboratory
local.publication.orgunit2Department of Electrical and Electronics Engineering
local.publication.orgunit2CoreLab (Communications Research and Innovation Laboratory)
local.publication.orgunit2Graduate School of Sciences and Engineering
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