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Optimized Analog Multi-Band Carrierless Amplitude and Phase Modulation for Visible Light Communication-Based Internet of Things Systems

2021-04-05Artigo científico Acesso aberto
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datacite.subject.fosCiências Naturais::Ciências Físicas
datacite.subject.fosEngenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática
datacite.subject.fosCiências Naturais::Ciências Químicas
datacite.subject.fosCiências Naturais::Ciências da Computação e da Informação
datacite.subject.fosCiências Naturais::Ciências Biológicas
datacite.subject.sdg03:Saúde de Qualidade
datacite.subject.sdg10:Reduzir as Desigualdades
datacite.subject.sdg11:Cidades e Comunidades Sustentáveis
dc.contributor.authorRodrigues, Luis
dc.contributor.authorFigueiredo, Mónica
dc.contributor.authorAlves, Luis Nero
dc.date.accessioned2026-03-11T18:30:08Z
dc.date.available2026-03-11T18:30:08Z
dc.date.issued2021-04-05
dc.description.abstractThis paper presents a multi-user Visible Light Communication (VLC)-based Internet of Things (IoT) system using multi band-Carrierless Amplitude and Phase (m-CAP) modulation for IoT applications. The proposed system uses a digital m-CAP modulator embedded in a ceiling LED light fixture and analog receivers, aiming at low-cost, low-power, and small-sized IoT devices. The performance was evaluated in terms of the filtering stage design and the usage of guard bands. Different pairs of emitter and receiver filters were considered. While Bessel and Butterworth analog filters were tested in the analog receiver, the digital m-CAP modulator pulse shaping filter considered raised cosine filters, as well as digital matched filters for the analog Bessel and Butterworth filters. Regarding the guard bands, two approaches were considered: either by using the raised cosine roll-off factor (bandwidth compression) or by suppressing the even bands. The Bit Error Rate (BER) performance was obtained by simulation. The usage of the Bessel filter in the receiver, along with a digital matched filter, proved to be the best solution, achieving a BER lower than 10−3 for an Eb/No of 6 dB, using a third-order filter. Furthermore, guard bands should be used in order to mitigate inter-band interference in order to have improved performance when multiple users intend to simultaneously communicate.eng
dc.description.sponsorshipThis paper was raised under the frameworks of the COST Action NEWFOCUS (CA19111), supported by COST (European Cooperation in Science and Technology). This research was funded by H2020/MSCA-ITN funding program under the framework of the European Training Network on Visible Light Based Interoperability and Networking, project (VisIoN) grant agreement No 764461.
dc.identifier.citationRodrigues, L.; Figueiredo, M.; Alves, L.N. Optimized Analog Multi-Band Carrierless Amplitude and Phase Modulation for Visible Light Communication-Based Internet of Things Systems. Sensors 2021, 21, 2537. https://doi.org/10.3390/s21072537.
dc.identifier.doi10.3390/s21072537
dc.identifier.eissn1424-8220
dc.identifier.urihttp://hdl.handle.net/10400.8/15849
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relationEuropean Training Network on Visible light based Interoperability and Networking
dc.relation.hasversionhttps://www.mdpi.com/1424-8220/21/7/2537
dc.relation.ispartofSensors
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectvisible light communications
dc.subjectInternet of Things
dc.subjectm-CAP modulation
dc.titleOptimized Analog Multi-Band Carrierless Amplitude and Phase Modulation for Visible Light Communication-Based Internet of Things Systemseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumber764461
oaire.awardTitleEuropean Training Network on Visible light based Interoperability and Networking
oaire.awardURIhttp://hdl.handle.net/10400.8/13782
oaire.citation.endPage24
oaire.citation.issue7
oaire.citation.startPage1
oaire.citation.titleJournal of Sensors
oaire.citation.volume21
oaire.fundingStreamEuropean Training Networks
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameFigueiredo
person.givenNameMónica
person.identifier.ciencia-id9111-8C1F-AFCD
person.identifier.orcid0000-0002-0780-3725
person.identifier.scopus-author-id24469657000
relation.isAuthorOfPublicationb31235fc-ac6f-4b97-8665-ad80c78f79d7
relation.isAuthorOfPublication.latestForDiscoveryb31235fc-ac6f-4b97-8665-ad80c78f79d7
relation.isProjectOfPublication65341980-15c5-4ae1-af0c-ddc440e49173
relation.isProjectOfPublication.latestForDiscovery65341980-15c5-4ae1-af0c-ddc440e49173

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This paper presents a multi-user Visible Light Communication (VLC)-based Internet of Things (IoT) system using multi band-Carrierless Amplitude and Phase (m-CAP) modulation for IoT applications. The proposed system uses a digital m-CAP modulator embedded in a ceiling LED light fixture and analog receivers, aiming at low-cost, low-power, and small-sized IoT devices. The performance was evaluated in terms of the filtering stage design and the usage of guard bands. Different pairs of emitter and receiver filters were considered. While Bessel and Butterworth analog filters were tested in the analog receiver, the digital m-CAP modulator pulse shaping filter considered raised cosine filters, as well as digital matched filters for the analog Bessel and Butterworth filters. Regarding the guard bands, two approaches were considered: either by using the raised cosine roll-off factor (bandwidth compression) or by suppressing the even bands. The Bit Error Rate (BER) performance was obtained by simulation. The usage of the Bessel filter in the receiver, along with a digital matched filter, proved to be the best solution, achieving a BER lower than 10−3 for an Eb/No of 6 dB, using a third-order filter. Furthermore, guard bands should be used in order to mitigate inter-band interference in order to have improved performance when multiple users intend to simultaneously communicate.
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