Multilayered optical OFDM for high spectral efficiency in visible light communication system

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dc.contributor.authorAbdulkafi, Ayad Atiyah
dc.contributor.authorHardan, Saad Mshhain
dc.contributor.authorBayat, Oğuz
dc.contributor.authorUçan, Osman Nuri
dc.date.accessioned2021-05-15T11:34:12Z
dc.date.available2021-05-15T11:34:12Z
dc.date.issued2019
dc.departmentMühendislik ve Doğa Bilimleri Fakültesi, Bilgisayar Mühendisliği Bölümüen_US
dc.description.abstractThis paper presents two new schemes for improving the spectral efficiency of an optical orthogonal frequency-division multiplexing-based visible light communication (OFDM-VLC) system. The proposed schemes employed the generalized spatial modulation (GenSM) along with multi-input multi-output (MIMO) techniques as well as modified the coded modulation optical OFDM (CMO-OFDM) approach to attain more bandwidth utilization and higher spectral efficiency. The proposed multilayered/enhanced CMO-OFDM (LeCMO-OFDM) systems ensure the real-valued optical OFDM signals without using Hermitian symmetry and utilize the redundant codes existed in CMO-OFDM for further improvements in system's spectral efficiency while ensuring acceptable bit error rate (BER) performance. LeCMO-OFDM scheme transmits multilayer optical signals after converting them to unipolar form either by using DC bias (DC-LeCMO-OFDM) or by separating them through employing the GenSM with no DC bias (NDC-LeCMO-OFDM). We present analytical and simulation results to evaluate the effectiveness of the proposed systems and demonstrate the additional capacity gain in terms of spectral efficiency. In addition, the impact of the spacing distance between the light emitting diodes has been addressed. Detailed performance comparison in terms of spectral efficiency and BER between the proposed techniques and other recent works is provided for validation purpose. Finally, results show that our schemes can achieve better spectral and power efficiencies performance with acceptable BER performance when compared with the related methods.en_US
dc.identifier.doi10.1007/s11107-019-00863-x
dc.identifier.endpage313en_US
dc.identifier.issn1387-974X
dc.identifier.issn1572-8188
dc.identifier.issue3en_US
dc.identifier.scopus2-s2.0-85073994014
dc.identifier.scopusqualityQ2
dc.identifier.startpage299en_US
dc.identifier.urihttps://doi.org/10.1007/s11107-019-00863-x
dc.identifier.urihttps://hdl.handle.net/20.500.12939/292
dc.identifier.volume38en_US
dc.identifier.wosWOS:000494480900001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorUçan, Osman Nuri
dc.institutionauthorBayat, Oğuz
dc.language.isoen
dc.publisherSpringeren_US
dc.relation.ispartofPhotonic Network Communications
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectMultilayered Optical OFDMen_US
dc.subjectVLCen_US
dc.subjectSpectral Efficiencyen_US
dc.subjectGeneralized Spatial Modulationen_US
dc.titleMultilayered optical OFDM for high spectral efficiency in visible light communication system
dc.typeArticle

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