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Bit error rates for focused general-type beams

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dc.contributor.author Altay Arpalı, Serap
dc.contributor.author Baykal, Yahya
dc.date.accessioned 2020-04-03T12:32:15Z
dc.date.available 2020-04-03T12:32:15Z
dc.date.issued 2009
dc.identifier.citation Arpali, Serap Altay; Baykal, Yahya, "Bit error rates for focused general-type beams", Piers 2009 Moscow Vols I And II, Proceedings, pp.1600-1603, (2009). tr_TR
dc.identifier.isbn 978-1-934142-10-3
dc.identifier.uri http://hdl.handle.net/20.500.12416/2897
dc.description.abstract Using the scintillation index of general beam formulation, bit error rate (BER) is investigated for focused Gaussian, cos-Gaussian, cosh-Gaussian and annular beams in weak atmospheric turbulence. We have employed our previously derived formulation of the scintillation index of these beams by Rytov method. Rytov method scintillation theory is known to yield accurate results for focused beams on horizontal paths under certain regions. Therefore we find the scintillation indices of the mentioned beams for the valid region. Using the log-normal distributed intensity, BER values versus signal-to-noise ratio (SNR) are calculated for Gaussian, cos-Gaussian, cosh-Gaussian and annular beams. In our study, the focal lengths (radius of curvature) of all the mentioned focused beams are equal to the propagation distance. The improvement of BER is observed for variations of propagation length, source size and wavelength of operation. Based on these parameters, BER values of Gaussian, cos-Gaussian, cosh-Gaussian and annular beams are compared. BER values we found for the focused Gaussian, cos-Gaussian, cosh-Gaussian and annular beams decrease with increasing source sizes. Likewise, BER values of focused Gaussian, cos-Gaussian, cosh-Gaussian and annular beams decrease with increasing wavelength. The focused annular beam attains the lowest BER value for small source sizes and long propagation distances. Moreover, BER for focused beams is compared with their collimated counterparts. We observe that focused beams have lower BER values than the collimated beams on horizontal paths. Our formulation can easily be extended to cover corresponding higher order beams, however in this paper we concentrate mainly on the zero order beams. tr_TR
dc.language.iso eng tr_TR
dc.publisher Electromagnetics Acad tr_TR
dc.rights info:eu-repo/semantics/closedAccess tr_TR
dc.subject Gaussian-Beam tr_TR
dc.subject Scintillation tr_TR
dc.subject Turbulence tr_TR
dc.title Bit error rates for focused general-type beams tr_TR
dc.type workingPaper tr_TR
dc.relation.journal Piers 2009 Moscow Vols I And II, Proceedings tr_TR
dc.contributor.authorID 51304 tr_TR
dc.contributor.authorID 7812 tr_TR
dc.identifier.startpage 1600 tr_TR
dc.identifier.endpage 1603 tr_TR
dc.contributor.department Çankaya Üniversitesi, Mühendislik Fakültesi, Elektronik ve Haberleşme Mühendisliği Bölümü tr_TR


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