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dc.contributor.authorSafari, Majid
dc.date.accessioned2011-01-21 17:02:14 (GMT)
dc.date.available2011-01-21 17:02:14 (GMT)
dc.date.issued2011-01-21T17:02:14Z
dc.date.submitted2011-01-04
dc.identifier.urihttp://hdl.handle.net/10012/5752
dc.description.abstractThe atmospheric lightwave propagation is considerably influenced by the random variations in the refractive index of air pockets due to turbulence. This undesired effect significantly degrades the performance of free-space optical (FSO) communication systems. Interestingly, the severity of such random degradations is highly related to the range of atmospheric propagation. In this thesis, we introduce relay-assisted FSO communications as a very promising technique to combat the degradation effects of atmospheric turbulence. Considering different configurations of the relays, we quantify the outage behavior of the relay-assisted system and identify the optimum relaying scheme. We further optimize the performance of the relay-assisted FSO system subject to some power constraints and provide optimal power control strategies for different scenarios under consideration. Moreover, an application of FSO relaying technique in quantum communications is investigated. The results demonstrate impressive performance improvements for the proposed relay-assisted FSO systems with respect to the conventional direct transmission whether applied in a classical or a quantum communication channel.en
dc.language.isoenen
dc.publisherUniversity of Waterlooen
dc.subjectOptical Communicationsen
dc.subjectAtmospheric Turbulenceen
dc.subjectRelay-Assisted Communicationen
dc.subjectIntensity Modulation Direct Detectionen
dc.subjectDiversity Gainen
dc.subjectOutage Probabilityen
dc.subjectGaussian Channelen
dc.subjectQuantum-Key Distrbutionen
dc.subjectPoisson Channelen
dc.subjectMulti-Hop Transmissionen
dc.subjectLognormal Fadingen
dc.subjectOptimum Power Allocationen
dc.titleRelay-Assisted Free-Space Optical Communicationsen
dc.typeDoctoral Thesisen
dc.pendingfalseen
dc.subject.programElectrical and Computer Engineeringen
uws-etd.degree.departmentElectrical and Computer Engineeringen
uws-etd.degreeDoctor of Philosophyen
uws.typeOfResourceTexten
uws.peerReviewStatusUnrevieweden
uws.scholarLevelGraduateen


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