Tropospheric scintillation in the Ka and Q bands
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/29640 |
Resumo: | The growth of satellite communications and the demand for services with higher bandwidth and adequate quality of service requires higher frequencies and the research on the propagation channel has become a necessity. This dissertation intends to study an impairment phenomenon, named scintillation, that radio signals suffer crossing the earth’s atmosphere. The study is supported experimentally by a set o propagation data collected in Aveiro: one at the Ka-band and other at the Q-band. These experimental data have been collected from 2016 until now and the total volume of data is about 20 GB. The theory behind scintillation is presented, in order to understand its physical basis and the influence on the signals. Experimental measurements were conducted to collect the signals amplitude at 8 S/s and process them with the aim of extracting the final scintillation signal. This signal is the base of every analysis done in this dissertation. The measured scintillation parameters are compared with some well-known models from literature. Additionally, this work establishes a relation between scintillation behavior with meteorological parameters and their correlation in a short and long term basis. The fades and enhancements distributions of the scintillation were calculated. The fades distribution can negatively impact the CNR at the reception. |
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Tropospheric scintillation in the Ka and Q bandsScintillationKa-bandQ-bandFadeEnhancementThe growth of satellite communications and the demand for services with higher bandwidth and adequate quality of service requires higher frequencies and the research on the propagation channel has become a necessity. This dissertation intends to study an impairment phenomenon, named scintillation, that radio signals suffer crossing the earth’s atmosphere. The study is supported experimentally by a set o propagation data collected in Aveiro: one at the Ka-band and other at the Q-band. These experimental data have been collected from 2016 until now and the total volume of data is about 20 GB. The theory behind scintillation is presented, in order to understand its physical basis and the influence on the signals. Experimental measurements were conducted to collect the signals amplitude at 8 S/s and process them with the aim of extracting the final scintillation signal. This signal is the base of every analysis done in this dissertation. The measured scintillation parameters are compared with some well-known models from literature. Additionally, this work establishes a relation between scintillation behavior with meteorological parameters and their correlation in a short and long term basis. The fades and enhancements distributions of the scintillation were calculated. The fades distribution can negatively impact the CNR at the reception.O aumento das comunicações via satélite tem sido um fenómeno global e continuado. Com este crescimento e o aumento da demanda dos consumidores por novas tecnologias com taxas transmissão de dados superiores levou à necessidade de um estudo detalhado do canal de propagação a frequências cada vez mais elevadas. Esta dissertação pretende estudar um fenómeno, chamado cintilação, que os sinais de rádio sofrem ao atravessar a atmosfera. Este estudo usa como suporte experimental dois sinais distintos medidos em Aveiro: um na banda Ka e outro na banda Q. Os dados experimentais foram recolhidos de 2016 até agora, sendo que foram reunidos cerca de 20 GB de dados. A teoria de suporte do fenómeno de cintilação é apresentada para que se possa entender a sua origem e influência nos sinais propagados. A campanha experimental recolheu medidas de amplitude a 8 amostras/s as quais foram processadas com o objetivo de extrair a cintilação. A cintilação é a base de toda análise feita nesta dissertação. Alguns parâmetros de cintilação são comparados com modelos já bem conhecidos da literatura. Adicionalmente, este trabalho estabelece uma relação entre o comportamento da cintilação com parâmetros meteorológicos e sua variação a curto e longo prazo. Estudaram-se ainda as distribuições estatísticas dos desvanecimentos e dos reforços do sinal de cintilação. Os desvanecimentos podem impactar negativamente a qualidade do sinal recebido.2019-072019-07-01T00:00:00Z2021-07-30T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10773/29640engPinho, Ana de Resende Gomes deinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T11:57:21Zoai:ria.ua.pt:10773/29640Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:01:55.464819Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Tropospheric scintillation in the Ka and Q bands |
title |
Tropospheric scintillation in the Ka and Q bands |
spellingShingle |
Tropospheric scintillation in the Ka and Q bands Pinho, Ana de Resende Gomes de Scintillation Ka-band Q-band Fade Enhancement |
title_short |
Tropospheric scintillation in the Ka and Q bands |
title_full |
Tropospheric scintillation in the Ka and Q bands |
title_fullStr |
Tropospheric scintillation in the Ka and Q bands |
title_full_unstemmed |
Tropospheric scintillation in the Ka and Q bands |
title_sort |
Tropospheric scintillation in the Ka and Q bands |
author |
Pinho, Ana de Resende Gomes de |
author_facet |
Pinho, Ana de Resende Gomes de |
author_role |
author |
dc.contributor.author.fl_str_mv |
Pinho, Ana de Resende Gomes de |
dc.subject.por.fl_str_mv |
Scintillation Ka-band Q-band Fade Enhancement |
topic |
Scintillation Ka-band Q-band Fade Enhancement |
description |
The growth of satellite communications and the demand for services with higher bandwidth and adequate quality of service requires higher frequencies and the research on the propagation channel has become a necessity. This dissertation intends to study an impairment phenomenon, named scintillation, that radio signals suffer crossing the earth’s atmosphere. The study is supported experimentally by a set o propagation data collected in Aveiro: one at the Ka-band and other at the Q-band. These experimental data have been collected from 2016 until now and the total volume of data is about 20 GB. The theory behind scintillation is presented, in order to understand its physical basis and the influence on the signals. Experimental measurements were conducted to collect the signals amplitude at 8 S/s and process them with the aim of extracting the final scintillation signal. This signal is the base of every analysis done in this dissertation. The measured scintillation parameters are compared with some well-known models from literature. Additionally, this work establishes a relation between scintillation behavior with meteorological parameters and their correlation in a short and long term basis. The fades and enhancements distributions of the scintillation were calculated. The fades distribution can negatively impact the CNR at the reception. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-07 2019-07-01T00:00:00Z 2021-07-30T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10773/29640 |
url |
http://hdl.handle.net/10773/29640 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799137674731192320 |