Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/127371
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dc.date.accessioned2017-01-25T09:31:36Z-
dc.date.available2017-01-25T09:31:36Z-
dc.identifier.urihttp://hdl.handle.net/10603/127371-
dc.description.abstractFree space optical (FSO) communications, is a cost-effective and high bandwidth access technique, which is receiving growing attention with recent commercialization application. This thesis analyses the performance of FSO communication and investigates the techniques to improve the performance of free space optics. Spatial and wavelength diversity techniques are studied and the effect of diversity on the performance of FSO communication link in atmospheric turbulence conditions is analyzed. Wavelength diversity technique is used to reduce the fading under strong atmospheric turbulence condition. Mathematical expressions for the estimation of the outage probability under strong atmospheric turbulence conditions are derived and considerable improvement is found using wavelength diversity. newlinePerformance of FSO link with different wavelengths and different aperture area of optical detector has been analyzed. Effects of different wavelengths on visibility range and quality factor of optical receiver is simulated to find the performance of FSO link. It is concluded that due to reduction in scattering loss at higher wavelength; as wavelength increases, quality factor of receiver improves. Quality factor of optical receiver is also improves with increment in aperture area of detector due to increment in sensitivity of receiver due to large aperture area. newlineThe link availability calculations were made based on the power budget analysis of FSO link and on the statistical analysis of visibility data. Four different cities were selected across different geographical conditions across the country to compare the weather conditions and the performance of FSO link for different cities of India is calculated. The visibility data of the cities throughout the year is found from the website Wundermap. It is concluded that, for a given link (i.e. Transmitted power, link range, beam divergence and transmitter-receiver aperture area) the performance of FSO link is not similar for all the geographical area as the visibility conditions.-
dc.format.extent1.8 Mb-
dc.languageEnglish-
dc.rightsuniversity-
dc.titleInvestigation on the performance and improvement of free space optical link in atmospheric turbulence-
dc.creator.researcherKshatriya, Anilkumar Jagdishprasadsingh-
dc.subject.keywordFree Space Optics(FSO)-
dc.subject.keywordBit Erreor Rate (BER)-
dc.subject.keywordLink Availability-
dc.subject.keywordAtmospheric Turbulence-
dc.subject.keywordOutage Probability-
dc.contributor.guideAggarwal, Akshai and Acharya, Y B and Majumdar, A K-
dc.publisher.placeAhmedabad-
dc.publisher.universityGujarat Technological University-
dc.publisher.institutionElectronics and Telecommunication Enigerring-
dc.date.registered22-11-11-
dc.date.completed17-03-16-
dc.date.awarded19-11-16-
dc.format.accompanyingmaterialNone-
dc.source.universityUniversity-
dc.type.degreePh.D.-
Appears in Departments:Electronics & Telecommunication Enigerring

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01_title.pdfAttached File83.51 kBAdobe PDFView/Open
02_certificate.pdf10.51 kBAdobe PDFView/Open
03_abstract.pdf13.91 kBAdobe PDFView/Open
04_declaration.pdf332.53 kBAdobe PDFView/Open
05_acknowledgement.pdf15.71 kBAdobe PDFView/Open
06_contents.pdf20.58 kBAdobe PDFView/Open
07_list_of_tables.pdf17.6 kBAdobe PDFView/Open
08_list of figures.pdf21.63 kBAdobe PDFView/Open
09_abbreviation.pdf15.97 kBAdobe PDFView/Open
10_chapter 1.pdf131.59 kBAdobe PDFView/Open
11_chapter 2.pdf230.67 kBAdobe PDFView/Open
12_chapter 3.pdf331.58 kBAdobe PDFView/Open
13_chapter 4.pdf134 kBAdobe PDFView/Open
14_chapter 5.pdf1.94 MBAdobe PDFView/Open
15_chapter 6.pdf58.74 kBAdobe PDFView/Open


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