Antenas adaptativas para sistemas de comunica??es

Detalhes bibliográficos
Autor(a) principal: Faria, Vagner Vilela de
Data de Publicação: 2004
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/90
Resumo: Adaptive antennas are radiating systems that allow the control of the shape and direction of the irradiation diagram. With this, they are able to guide the main wolf of the radiation pattern to the desired signal and simultaneously reduce the influence of the interfering signals. These systems present a marked demand in 3G and 4G technologies of the mobile cellular system. This makes it possible to increase the channel capacity of the system. So, this work presents a theoretical study of this system and the computer simulations based on the proposed theories. The study is based on obtaining the signal from a plane wave that reaches a linear network of radiating elements. In this network, processing parameters, known as weights, are introduced that allow adjusting the phase and amplitude of the transmitted / received signal. The adjustments are made by a digital signal processor that, through special algorithms, update the network weights in function of the directions of the desired signal and the suppression of the interferences. In the calculations and in the simulations the mathematical algorithms and functions are used that describe the control of the irradiation diagram obtained in the diagrams
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spelling Ribeiro, Jos? Ant?nio Justino012.620.256-72http://lattes.cnpq.br/9987344139958522Ribeiro, Jos? Ant?nio Justino012.620.256-72http://lattes.cnpq.br/9987344139958522Silveira, Mauriciohttp://lattes.cnpq.br/1509854946762583Kretly, Luiz Luiz Carloshttp://lattes.cnpq.br/3840617687938512http://lattes.cnpq.br/9343315708006731Faria, Vagner Vilela de2017-01-17T13:05:58Z2004-08-22Faria, Vagner Vilela de. Antenas adaptativas para sistemas de comunica??es. 2004. [164]. disserta??o( Mestrado em Engenharia de Telecomunica??es) - Instituto Nacional de Telecomunica??es, [Santa Rita do Sapuca?] .http://tede.inatel.br:8080/tede/handle/tede/90Adaptive antennas are radiating systems that allow the control of the shape and direction of the irradiation diagram. With this, they are able to guide the main wolf of the radiation pattern to the desired signal and simultaneously reduce the influence of the interfering signals. These systems present a marked demand in 3G and 4G technologies of the mobile cellular system. This makes it possible to increase the channel capacity of the system. So, this work presents a theoretical study of this system and the computer simulations based on the proposed theories. The study is based on obtaining the signal from a plane wave that reaches a linear network of radiating elements. In this network, processing parameters, known as weights, are introduced that allow adjusting the phase and amplitude of the transmitted / received signal. The adjustments are made by a digital signal processor that, through special algorithms, update the network weights in function of the directions of the desired signal and the suppression of the interferences. In the calculations and in the simulations the mathematical algorithms and functions are used that describe the control of the irradiation diagram obtained in the diagramsAs antenas adaptativas s?o sistemas irradiantes que permitem o controle do formato e da dire??o do diagrama de irradia??o. Com isto, s?o capazes de orientar o lobo principal do diagrama de irradia??o para o sinal desejado e reduzir, simultaneamente, a influ?ncia dos sinais interferentes. Estes sistemas apresentam demanda acentuada nas tecnologias 3G e 4G do sistema m?vel celular. O que torna poss?vel o aumento na capacidade de canal do sistema. Ent?o, este trabalho apresenta um estudo te?rico deste sistema e as simula??es em computador baseadas nas teorias propostas. O estudo baseia-se na obten??o do sinal a partir de uma onda plana que atinge uma rede linear de elementos irradiantes. Nessa rede, s?o introduzidos par?metros de processamento, conhecidos como pesos, que permitem ajustar a fase e a amplitude do sinal transmitido/recebido. Os ajustes s?o feitos por um processador digital de sinal que, atrav?s de algoritmos especiais, fazem a atualiza??o dos pesos da rede em fun??o das dire??es do sinal desejado e da supress?o das interfer?ncias. Nos c?lculos e nas simula??es utilizam-se os algoritmos e fun??es matem?ticas que descrevem o controle do diagrama de irradia??o obtido nos diagramasSubmitted by Tede Dspace (tede@inatel.br) on 2017-01-17T13:05:58Z No. of bitstreams: 2 Disserta??o.pdf: 1314488 bytes, checksum: 1e93bb1eaadf42d59124f14a3bfb55f0 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Made available in DSpace on 2017-01-17T13:05:58Z (GMT). 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dc.title.por.fl_str_mv Antenas adaptativas para sistemas de comunica??es
title Antenas adaptativas para sistemas de comunica??es
spellingShingle Antenas adaptativas para sistemas de comunica??es
Faria, Vagner Vilela de
Redes de antenas; antenas adaptativas; antenas inteligentes; controle de interfer?ncia; processamento sinal digital
Engenharia - Telecomunica??es
title_short Antenas adaptativas para sistemas de comunica??es
title_full Antenas adaptativas para sistemas de comunica??es
title_fullStr Antenas adaptativas para sistemas de comunica??es
title_full_unstemmed Antenas adaptativas para sistemas de comunica??es
title_sort Antenas adaptativas para sistemas de comunica??es
author Faria, Vagner Vilela de
author_facet Faria, Vagner Vilela 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.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 Silveira, Mauricio
dc.contributor.referee2Lattes.fl_str_mv http://lattes.cnpq.br/1509854946762583
dc.contributor.referee3.fl_str_mv Kretly, Luiz Luiz Carlos
dc.contributor.referee3Lattes.fl_str_mv http://lattes.cnpq.br/3840617687938512
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/9343315708006731
dc.contributor.author.fl_str_mv Faria, Vagner Vilela de
contributor_str_mv Ribeiro, Jos? Ant?nio Justino
Ribeiro, Jos? Ant?nio Justino
Silveira, Mauricio
Kretly, Luiz Luiz Carlos
dc.subject.por.fl_str_mv Redes de antenas; antenas adaptativas; antenas inteligentes; controle de interfer?ncia; processamento sinal digital
topic Redes de antenas; antenas adaptativas; antenas inteligentes; controle de interfer?ncia; processamento sinal digital
Engenharia - Telecomunica??es
dc.subject.cnpq.fl_str_mv Engenharia - Telecomunica??es
description Adaptive antennas are radiating systems that allow the control of the shape and direction of the irradiation diagram. With this, they are able to guide the main wolf of the radiation pattern to the desired signal and simultaneously reduce the influence of the interfering signals. These systems present a marked demand in 3G and 4G technologies of the mobile cellular system. This makes it possible to increase the channel capacity of the system. So, this work presents a theoretical study of this system and the computer simulations based on the proposed theories. The study is based on obtaining the signal from a plane wave that reaches a linear network of radiating elements. In this network, processing parameters, known as weights, are introduced that allow adjusting the phase and amplitude of the transmitted / received signal. The adjustments are made by a digital signal processor that, through special algorithms, update the network weights in function of the directions of the desired signal and the suppression of the interferences. In the calculations and in the simulations the mathematical algorithms and functions are used that describe the control of the irradiation diagram obtained in the diagrams
publishDate 2004
dc.date.issued.fl_str_mv 2004-08-22
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dc.identifier.citation.fl_str_mv Faria, Vagner Vilela de. Antenas adaptativas para sistemas de comunica??es. 2004. [164]. disserta??o( Mestrado em Engenharia de Telecomunica??es) - Instituto Nacional de Telecomunica??es, [Santa Rita do Sapuca?] .
dc.identifier.uri.fl_str_mv http://tede.inatel.br:8080/tede/handle/tede/90
identifier_str_mv Faria, Vagner Vilela de. Antenas adaptativas para sistemas de comunica??es. 2004. [164]. disserta??o( Mestrado em Engenharia de Telecomunica??es) - Instituto Nacional de Telecomunica??es, [Santa Rita do Sapuca?] .
url http://tede.inatel.br:8080/tede/handle/tede/90
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dc.publisher.department.fl_str_mv Instituto Nacional de Telecomunica??es
publisher.none.fl_str_mv Instituto Nacional de Telecomunica??es
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