Efeitos da neblina no sistema de comunica??es ?pticas no espa?o aberto

Detalhes bibliográficos
Autor(a) principal: Almeida , Indira Mar?lia Ant?nio de
Data de Publicação: 2017
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da INATEL
Texto Completo: http://tede.inatel.br:8080/tede/handle/tede/159
Resumo: Free space optics (FSO) communication systems are characterized by the transmission of information applying optical propagation through the atmosphere. It is a promising technology for wireless broadband networks and an alternative to be used in conjunction with radiofrequency (RF) and optical fiber systems. However, the performance of this technology is dependent on the conditions of the beam propagation medium. Atmospheric factors, such as fog, water droplets, dust concentration and aerosol particles, produce absorption and scattering causing a degradation in the optical link. This dissertation presents the concepts and limitations of FSO system. An optical link was evaluated with the transmission channel under the influence of the fog. Two wavelengths were used, one in the visible range 532nm and another in the near infrared 1550nm. Attenuations in the fog were obtained for different degrees of relative humidity at those wavelengths. It was analyzed the temporal dispersion ultrashort pulses and the effects on the eye diagram. In the analysis of the performance of the link it was obtained the bit error rate (BER) by the factor that measures the quality of the eye (Q). The value of the BER in the fog showed that signal is acceptable for data transmission, although complying with the limit of forward error correction (FEC).
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spelling Ribeiro, Jos? Ant?nio Justino012.620.256-72http://lattes.cnpq.br/9987344139958522Saito, L?cia Akemi Miyazatohttp://lattes.cnpq.br/0915583034741895Ribeiro, Jos? Ant?nio Justino012.620.256-72http://lattes.cnpq.br/9987344139958522Marins, Carlos Nazareth Motta000.753.557-01http://lattes.cnpq.br/1017511698822128Junqueira, Mateus Augusto Faustino Chiabhttp://lattes.cnpq.br/5630256510574887Saito, L?cia Akemi Miyazatohttp://lattes.cnpq.br/0915583034741895017.661.536-90Almeida , Indira Mar?lia Ant?nio de2018-01-10T17:00:40Z2017-10-26Almeida , Indira Mar?lia Ant?nio de. Efeitos da neblina no sistema de comunica??es ?pticas no espa?o aberto. 2017. [90]. disserta??o( Mestrado em Engenharia de Telecomunica??es) - Instituto Nacional de Telecomunica??es, [Santa Rita Sapuca?] .http://tede.inatel.br:8080/tede/handle/tede/159Free space optics (FSO) communication systems are characterized by the transmission of information applying optical propagation through the atmosphere. It is a promising technology for wireless broadband networks and an alternative to be used in conjunction with radiofrequency (RF) and optical fiber systems. However, the performance of this technology is dependent on the conditions of the beam propagation medium. Atmospheric factors, such as fog, water droplets, dust concentration and aerosol particles, produce absorption and scattering causing a degradation in the optical link. This dissertation presents the concepts and limitations of FSO system. An optical link was evaluated with the transmission channel under the influence of the fog. Two wavelengths were used, one in the visible range 532nm and another in the near infrared 1550nm. Attenuations in the fog were obtained for different degrees of relative humidity at those wavelengths. It was analyzed the temporal dispersion ultrashort pulses and the effects on the eye diagram. In the analysis of the performance of the link it was obtained the bit error rate (BER) by the factor that measures the quality of the eye (Q). The value of the BER in the fog showed that signal is acceptable for data transmission, although complying with the limit of forward error correction (FEC).O sistema de comunica??es ?pticas no espa?o aberto (FSO, free space optics) caracteri-za-se pela transmiss?o de informa??o tendo feixes ?pticos como onda portadora propagando-se na atmosfera. Trata-se de uma tecnologia promissora para redes de banda larga sem fio e uma alternativa a ser utilizada em conjunto com os sistemas tradicionais de radiofreq??ncia (RF) e os que empregam fibras ?pticas. O desempenho dessa tecnologia ? dependente das condi??es do meio de propaga??o, incluindo fatores clim?ticos como, por exemplo, a neblina, gotas de ?gua e part?culas de aeross?is em suspens?o. Esses fatores agem como causas de ab-sor??o e espalhamento, levando ? degrada??o do feixe ?ptico modulado. Este trabalho apre-senta os conceitos e limita??es do sistema FSO, com uma an?lise te?rica e avalia??o experi-mental de um enlace ?ptico sob a influ?ncia da neblina. Nos ensaios, foram utilizados dois comprimentos de onda, um na faixa vis?vel de 532nm e outro no infravermelho pr?ximo de 1550nm, coincidente com sistemas de comunica??es a fibras ?pticas. Nestes comprimentos de onda, obtiveram-se as atenua??es na neblina para diferentes graus de umidade. Analisou-se a dispers?o temporal da dura??o de pulsos ultracurtos no enlace, sem neblina e com neblina, na condi??o de 90% de umidade. Utilizou-se o diagrama de olho na an?lise do desempenho do enlace e determinou-se a taxa de erro de bit (BER, bit error rate) pelo fator que mede a quali-dade do olho (Q). O valor da BER na neblina mostrou-se aceit?vel para a transmiss?o de da-dos em certos limites de alcance, obedecendo ao limite do c?digo de corre??o de erro (FEC, forward error correction).Submitted by Tede Dspace (tede@inatel.br) on 2018-01-10T17:00:40Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta??o vers?o Final 26122017.pdf: 1787103 bytes, checksum: 0334f538c6da23db73087cbd083f2a59 (MD5)Made available in DSpace on 2018-01-10T17:00:40Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Disserta??o vers?o Final 26122017.pdf: 1787103 bytes, checksum: 0334f538c6da23db73087cbd083f2a59 (MD5) Previous issue date: 2017-10-26application/pdfhttp://tede.inatel.br:8080/jspui/retrieve/1297/Disserta%c3%a7%c3%a3o%20vers%c3%a3o%20Final%2026122017.pdf.jpgporInstituto Nacional de Telecomunica??esMestrado em Engenharia de Telecomunica??esINATELBrasilInstituto Nacional de Telecomunica??eshttp://creativecommons.org/licenses/by-nd/4.0/info:eu-repo/semantics/openAccessSistemas ?pticos no espa?o aberto; efeitos da neblina; degrada??o do feixe ?ptico.Engenharia - Telecomunica??esEfeitos da neblina no sistema de comunica??es ?pticas no espa?o abertoinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisreponame:Biblioteca Digital de Teses e Dissertações da INATELinstname:Instituto Nacional de Telecomunicações (INATEL)instacron:INATELLICENSElicense.txtlicense.txttext/plain; charset=utf-8112http://localhost:8080/tede/bitstream/tede/159/1/license.txtc6279291b293f0db82678eaa73a27769MD51CC-LICENSElicense_urllicense_urltext/plain; charset=utf-846http://localhost:8080/tede/bitstream/tede/159/2/license_url587cd8ffae15c8598ed3c46d248a3f38MD52license_textlicense_texttext/html; charset=utf-80http://localhost:8080/tede/bitstream/tede/159/3/license_textd41d8cd98f00b204e9800998ecf8427eMD53license_rdflicense_rdfapplication/rdf+xml; charset=utf-80http://localhost:8080/tede/bitstream/tede/159/4/license_rdfd41d8cd98f00b204e9800998ecf8427eMD54ORIGINALDisserta??o vers?o Final 26122017.pdfDisserta??o vers?o Final 26122017.pdfapplication/pdf1787103http://localhost:8080/tede/bitstream/tede/159/5/Disserta%C3%A7%C3%A3o+vers%C3%A3o+Final+26122017.pdf0334f538c6da23db73087cbd083f2a59MD55TEXTDisserta??o vers?o Final 26122017.pdf.txtDisserta??o vers?o Final 26122017.pdf.txttext/plain151469http://localhost:8080/tede/bitstream/tede/159/6/Disserta%C3%A7%C3%A3o+vers%C3%A3o+Final+26122017.pdf.txt3c52c9792f958f208160a9726634b569MD56THUMBNAILDisserta??o vers?o Final 26122017.pdf.jpgDisserta??o vers?o Final 26122017.pdf.jpgimage/jpeg4008http://localhost:8080/tede/bitstream/tede/159/7/Disserta%C3%A7%C3%A3o+vers%C3%A3o+Final+26122017.pdf.jpgd3f1984d87e6539929c993aa4a587308MD57tede/1592018-04-19 16:18:12.172oai:localhost:tede/159QXV0b3Jpem8gYSBwdWJsaWNhPz9vIGRhIG1pbmhhIERpc3NlcnRhPz9vIGRlIE1lc3RyYWRvLCBlbSBmb3JtYXRvIFBERiwgY29tIGJsb3F1ZWlvIGRlIGVkaT8/bywgY29sYWdlbSBlIGM/cGlhLg==Biblioteca Digital de Teses e Dissertaçõeshttp://tede.inatel.br:8080/jspui/PUBhttp://tede.inatel.br:8080/oai/requestbiblioteca@inatel.br || biblioteca.atendimento@inatel.bropendoar:2018-04-19T19:18:12Biblioteca Digital de Teses e Dissertações da INATEL - Instituto Nacional de Telecomunicações (INATEL)false
dc.title.por.fl_str_mv Efeitos da neblina no sistema de comunica??es ?pticas no espa?o aberto
title Efeitos da neblina no sistema de comunica??es ?pticas no espa?o aberto
spellingShingle Efeitos da neblina no sistema de comunica??es ?pticas no espa?o aberto
Almeida , Indira Mar?lia Ant?nio de
Sistemas ?pticos no espa?o aberto; efeitos da neblina; degrada??o do feixe ?ptico.
Engenharia - Telecomunica??es
title_short Efeitos da neblina no sistema de comunica??es ?pticas no espa?o aberto
title_full Efeitos da neblina no sistema de comunica??es ?pticas no espa?o aberto
title_fullStr Efeitos da neblina no sistema de comunica??es ?pticas no espa?o aberto
title_full_unstemmed Efeitos da neblina no sistema de comunica??es ?pticas no espa?o aberto
title_sort Efeitos da neblina no sistema de comunica??es ?pticas no espa?o aberto
author Almeida , Indira Mar?lia Ant?nio de
author_facet Almeida , Indira Mar?lia Ant?nio de
author_role author
dc.contributor.advisor1.fl_str_mv Ribeiro, Jos? Ant?nio Justino
dc.contributor.advisor1ID.fl_str_mv 012.620.256-72
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/9987344139958522
dc.contributor.advisor-co1.fl_str_mv Saito, L?cia Akemi Miyazato
dc.contributor.advisor-co1Lattes.fl_str_mv http://lattes.cnpq.br/0915583034741895
dc.contributor.referee1.fl_str_mv Ribeiro, Jos? Ant?nio Justino
dc.contributor.referee1ID.fl_str_mv 012.620.256-72
dc.contributor.referee1Lattes.fl_str_mv http://lattes.cnpq.br/9987344139958522
dc.contributor.referee2.fl_str_mv Marins, Carlos Nazareth Motta
dc.contributor.referee2ID.fl_str_mv 000.753.557-01
dc.contributor.referee2Lattes.fl_str_mv http://lattes.cnpq.br/1017511698822128
dc.contributor.referee3.fl_str_mv Junqueira, Mateus Augusto Faustino Chiab
dc.contributor.referee3Lattes.fl_str_mv http://lattes.cnpq.br/5630256510574887
dc.contributor.referee4.fl_str_mv Saito, L?cia Akemi Miyazato
dc.contributor.referee4Lattes.fl_str_mv http://lattes.cnpq.br/0915583034741895
dc.contributor.authorID.fl_str_mv 017.661.536-90
dc.contributor.author.fl_str_mv Almeida , Indira Mar?lia Ant?nio de
contributor_str_mv Ribeiro, Jos? Ant?nio Justino
Saito, L?cia Akemi Miyazato
Ribeiro, Jos? Ant?nio Justino
Marins, Carlos Nazareth Motta
Junqueira, Mateus Augusto Faustino Chiab
Saito, L?cia Akemi Miyazato
dc.subject.por.fl_str_mv Sistemas ?pticos no espa?o aberto; efeitos da neblina; degrada??o do feixe ?ptico.
topic Sistemas ?pticos no espa?o aberto; efeitos da neblina; degrada??o do feixe ?ptico.
Engenharia - Telecomunica??es
dc.subject.cnpq.fl_str_mv Engenharia - Telecomunica??es
description Free space optics (FSO) communication systems are characterized by the transmission of information applying optical propagation through the atmosphere. It is a promising technology for wireless broadband networks and an alternative to be used in conjunction with radiofrequency (RF) and optical fiber systems. However, the performance of this technology is dependent on the conditions of the beam propagation medium. Atmospheric factors, such as fog, water droplets, dust concentration and aerosol particles, produce absorption and scattering causing a degradation in the optical link. This dissertation presents the concepts and limitations of FSO system. An optical link was evaluated with the transmission channel under the influence of the fog. Two wavelengths were used, one in the visible range 532nm and another in the near infrared 1550nm. Attenuations in the fog were obtained for different degrees of relative humidity at those wavelengths. It was analyzed the temporal dispersion ultrashort pulses and the effects on the eye diagram. In the analysis of the performance of the link it was obtained the bit error rate (BER) by the factor that measures the quality of the eye (Q). The value of the BER in the fog showed that signal is acceptable for data transmission, although complying with the limit of forward error correction (FEC).
publishDate 2017
dc.date.issued.fl_str_mv 2017-10-26
dc.date.accessioned.fl_str_mv 2018-01-10T17:00:40Z
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dc.identifier.citation.fl_str_mv Almeida , Indira Mar?lia Ant?nio de. Efeitos da neblina no sistema de comunica??es ?pticas no espa?o aberto. 2017. [90]. disserta??o( Mestrado em Engenharia de Telecomunica??es) - Instituto Nacional de Telecomunica??es, [Santa Rita Sapuca?] .
dc.identifier.uri.fl_str_mv http://tede.inatel.br:8080/tede/handle/tede/159
identifier_str_mv Almeida , Indira Mar?lia Ant?nio de. Efeitos da neblina no sistema de comunica??es ?pticas no espa?o aberto. 2017. [90]. disserta??o( Mestrado em Engenharia de Telecomunica??es) - Instituto Nacional de Telecomunica??es, [Santa Rita Sapuca?] .
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