Performance Evaluation of White LED-based OFDM-VLC Systems with Blue Filters: Experimental Study

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dc.contributor.authorTokgöz, Sezer Can
dc.contributor.authorAnous, Noha
dc.contributor.authorYarkan, Serkan
dc.contributor.authorBoyacı, Ali
dc.contributor.authorQaraqe, Khalid A.
dc.date.accessioned2020-11-21T15:56:57Z
dc.date.available2020-11-21T15:56:57Z
dc.date.issued2019en_US
dc.departmentİstanbul Ticaret Üniversitesien_US
dc.description16th International Multi-Conference on Systems, Signals and Devices, SSD 2019 -- 21 March 2019 through 24 March 2019 -- -- 154292en_US
dc.description.abstractThis paper experimentally evaluates the performance of visible light communications (VLC) systems employing phosphor-coated white light emitting diodes (LEDs). Phosphor-coated white LEDs though widely used commercially, are known to limit the system's maximum data rate. Such a limitation is conventionally treated by two methods: either adding a blue filter at the receiver or using orthogonal frequency multiplexing (OFDM) digital modulation technique. Adding a blue filter at the receiver is controversial in current literature and claimed to decrease the signal-to-noise-ratio (SNR) or to be inefficient if OFDM is employed. Hence, in this work, we experimentally evaluate the above OFDM based VLC system with and without a blue filter. Results are compared to prove that adding a blue filter at the receiver boosts SNR and bit-error-rate (BER) values. This, in turn, helps maximize the data rates supported by such systems. The addition of a blue filter is tested with different modulation techniques. Results in this work remove the controversy around employing a blue filter in OFDM based VLC systems with phosphor-coated white LEDs. Improved BERs and SNRs at high data rates are observed. Specifically, this experimental work demonstrates a BER enhancement of ?40% and ?15% for data rates up to 12 Mbps when a blue filter is added. © 2019 IEEE.en_US
dc.description.sponsorshipTexas A and M University, TAMU: 2019 -- insignificant effect if OFDM is employed. In this work, we experimentally assess the above OFDM based VLC system with and without adding a blue filter. Comparing results prove that adding a blue filter at the receiver’s end improves BER values by ?35% to ?47% according to the modulation type used. Results from this work show the following: • It removes the doubts that blue filters neg-atively affect the SNR. Despite reducing the signal power by suppressing the slow yellow spectrum, blue filters reject ambient noise in the visible spectra. Thus, the resulting SNR is elevated. • Blue filters continue to boost the system’s per-formance in terms of SNR and BER in VLC systems employing OFDM. Hence, the claim that blue filters maybe of no use while using OFDM is proven wrong. • Combining adding a blue filter along with adopting OFDM results in improved BERs and SNRs at high data rates. In specific, this experimental work depicts a BER reduction of 40% and 15% for data rates up to 12 Mbps when a blue filter is added with the presence of OFDM modulation. ACKNOWLEDGEMENTS This work was supported by the Texas A&M University at Qatar (TAMUQ) responsive research seed grants 2019. -- --en_US
dc.identifier.doi10.1109/SSD.2019.8893211en_US
dc.identifier.endpage690en_US
dc.identifier.isbn9781730000000
dc.identifier.scopus2-s2.0-85075637445en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage686en_US
dc.identifier.urihttps://doi.org/10.1109/SSD.2019.8893211
dc.identifier.urihttps://hdl.handle.net/11467/4201
dc.identifier.wosWOS:000518383300115en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherInstitute of Electrical and Electronics Engineers Inc.en_US
dc.relation.ispartof16th International Multi-Conference on Systems, Signals and Devices, SSD 2019en_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectblue filtersen_US
dc.subjectexperimental studyen_US
dc.subjectOFDMen_US
dc.subjectphosphor LEDsen_US
dc.subjectVLCen_US
dc.titlePerformance Evaluation of White LED-based OFDM-VLC Systems with Blue Filters: Experimental Studyen_US
dc.typeConference Objecten_US

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