Bandwidth Efficient Root Nyquist Pulses for Optical Intensity Channels

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dc.contributor.authorFatima, Sabeena
dc.contributor.authorMuhammad, S. Sheikh
dc.contributor.authorRaza, A. D.
dc.coverage.issue1cs
dc.coverage.volume24cs
dc.date.accessioned2015-05-21T10:51:39Z
dc.date.available2015-05-21T10:51:39Z
dc.date.issued2015-04cs
dc.description.abstractIndoor diffuse optical intensity channels are bandwidth constrained due to the multiple reflected paths between the transmitter and the receiver which cause considerable inter-symbol interference (ISI). The transmitted signal amplitude is inherently non-negative, being a light intensity signal. All optical intensity root Nyquist pulses are time-limited to a single symbol interval which eliminates the possibility of finding bandlimited root Nyquist pulses. However, potential exists to design bandwidth efficient pulses. This paper investigates the modified hermite polynomial functions and prolate spheroidal wave functions as candidate waveforms for designing spectrally efficient optical pulses. These functions yield orthogonal pulses which have constant pulse duration irrespective of the order of the function, making them ideal for designing an ISI free pulse. Simulation results comparing the two pulses and challenges pertaining to their design and implementation are discussed.en
dc.formattextcs
dc.format.extent17-24cs
dc.format.mimetypeapplication/pdfen
dc.identifier.citationRadioengineering. 2015 vol. 24, č. 1, s. 17-24. ISSN 1210-2512cs
dc.identifier.doi10.13164/re.2015.0017en
dc.identifier.issn1210-2512
dc.identifier.urihttp://hdl.handle.net/11012/38724
dc.language.isoencs
dc.publisherSpolečnost pro radioelektronické inženýrstvícs
dc.relation.ispartofRadioengineeringcs
dc.relation.urihttp://www.radioeng.cz/fulltexts/2015/15_01_0017_0024.pdfcs
dc.rightsCreative Commons Attribution 3.0 Unported Licenseen
dc.rights.accessopenAccessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en
dc.subjectNyquist Pulseen
dc.subjectoptical intensity signalingen
dc.subjectPSWFen
dc.subjectProlate Spheroidal Wave Functionsen
dc.subjectMHPFen
dc.subjectModified Hermite Polynomial Functionen
dc.subjectISIen
dc.subjectInter Symbol Interferenceen
dc.titleBandwidth Efficient Root Nyquist Pulses for Optical Intensity Channelsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
eprints.affiliatedInstitution.facultyFakulta eletrotechniky a komunikačních technologiícs
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