AnÃlise de Sistemas OFDM Cooperativos AF com Amplificadores de PotÃncia NÃo Linearesâ
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da UFC |
Texto Completo: | http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10366 |
Resumo: | Cooperation diversity and orthogonal frequency division multiplexing (OFDM) are two key technologies for the modern wireless communication systems. The cooperative communication systems considered through this work use the OFDM technology and they are composed of: one transmitter with a nonlinear power amplifier (PA), one or more amplify-and-forward (AF) relays, also having a nonlinear PAs, and one destination node. In this dissertaion, it is initially proposed an optimal receiver, in the signal to noise ratio (SNR) sense, for a nonlinear cooperative AF system. The proposed receiver uses the maximum ratio combining (MRC) diversity technique to combine the received signas, assuming that both the source-destination and source-relay-destination links are available. In the sequel, closed-form expressions for the instantaneous SNR and outage probability of the considered system are developed. The outage analysis is then extended to the case of a multi-hop system, that is, with multiple serial relays. Finally, an outage analysis is also proposed for a nonlinear AF OFDM system using a Selection Combining receiver, considering two cases: one relay and multiple parallel relays. Numerical simulation results are presented through the work, evaluating the performance of the proposed receiver and theoretical expressions. |
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Biblioteca Digital de Teses e Dissertações da UFC |
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info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisAnÃlise de Sistemas OFDM Cooperativos AF com Amplificadores de PotÃncia NÃo LinearesâAnalysis of Cooperative Systems OFDM AF with Nonlinear Power Amplifiers2013-07-26Andrà Lima FÃrrer de Almeida77024494387http://lattes.cnpq.br/118383051485731466213878300http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4426514E8Eder Jacques Porfirio FariasUniversidade Federal do CearÃPrograma de PÃs-GraduaÃÃo em Engenharia de TeleinformÃticaUFCBRTeleinformÃtica Sistemas de comunicaÃÃo sem fio Selection Combining MÃltiplos Relays Cooperative Communications Nonlinear Power AmplifierOptimum Receiver Outage ProbabilityENGENHARIASCooperation diversity and orthogonal frequency division multiplexing (OFDM) are two key technologies for the modern wireless communication systems. The cooperative communication systems considered through this work use the OFDM technology and they are composed of: one transmitter with a nonlinear power amplifier (PA), one or more amplify-and-forward (AF) relays, also having a nonlinear PAs, and one destination node. In this dissertaion, it is initially proposed an optimal receiver, in the signal to noise ratio (SNR) sense, for a nonlinear cooperative AF system. The proposed receiver uses the maximum ratio combining (MRC) diversity technique to combine the received signas, assuming that both the source-destination and source-relay-destination links are available. In the sequel, closed-form expressions for the instantaneous SNR and outage probability of the considered system are developed. The outage analysis is then extended to the case of a multi-hop system, that is, with multiple serial relays. Finally, an outage analysis is also proposed for a nonlinear AF OFDM system using a Selection Combining receiver, considering two cases: one relay and multiple parallel relays. Numerical simulation results are presented through the work, evaluating the performance of the proposed receiver and theoretical expressions.A diversidade cooperativa e a multiplexaÃÃo por divisÃo de frequÃncias ortogonais (Orthogonal Frequency Division Multiplexing - OFDM) sÃo duas das principais tecnologias para os sistemas de comunicaÃÃo sem fio modernos. Os sistemas de comunicaÃÃo cooperativos considerados neste trabalho de dissertaÃÃo utilizam a tecnologia OFDM e possuem: uma fonte com amplificador de potÃncia nÃo linear, um ou mais repetidores (relays) do tipo amplifica-e-encaminha (Amplify-and-Forward - AF), tambÃm com amplificadores de potÃncia (Power Amplifier - PA) nÃo lineares, e um nà destino. PropÃe-se inicialmente um receptor Ãtimo, no sentido da razÃo sinal ruÃdo (Signal-to-Noise Ratio - SNR) para um sistema OFDM cooperativo nÃo linear. Usando a tÃcnica de diversidade por combinaÃÃo de razÃo mÃxima (Maximal Ratio Combining - MRC) para tratar os sinais recebidos, o receptor proposto considera tanto as informaÃÃes oriundas do caminho direto (fonte-destino) como as provenientes do repetidor. Posteriormente, sÃo apresentadas expressÃes para o cÃlculo da SNR instantÃnea e da probabilidade de outage do sistema proposto. Fez-se ainda, uma proposta de expressÃo para o cÃlculo da probabilidade de outage do sistema considerando mÃltiplos relays em sÃrie. Por fim, propÃe-se expressÃes para o cÃlculo da probabilidade de outage do sistema utilizando receptor Selection Combining para um e para mÃltiplos relays dispostos paralelamente. Resultados de simulaÃÃo sÃo apresentados durante todo o trabalho, evidenciando o desempenho do receptor e das expressÃes propostas.CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superiorhttp://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10366application/pdfinfo:eu-repo/semantics/openAccessporreponame:Biblioteca Digital de Teses e Dissertações da UFCinstname:Universidade Federal do Cearáinstacron:UFC2019-01-21T11:23:29Zmail@mail.com - |
dc.title.pt.fl_str_mv |
AnÃlise de Sistemas OFDM Cooperativos AF com Amplificadores de PotÃncia NÃo Linearesâ |
dc.title.alternative..fl_str_mv |
Analysis of Cooperative Systems OFDM AF with Nonlinear Power Amplifiers |
title |
AnÃlise de Sistemas OFDM Cooperativos AF com Amplificadores de PotÃncia NÃo Linearesâ |
spellingShingle |
AnÃlise de Sistemas OFDM Cooperativos AF com Amplificadores de PotÃncia NÃo Linearesâ Eder Jacques Porfirio Farias TeleinformÃtica Sistemas de comunicaÃÃo sem fio Selection Combining MÃltiplos Relays Cooperative Communications Nonlinear Power Amplifier Optimum Receiver Outage Probability ENGENHARIAS |
title_short |
AnÃlise de Sistemas OFDM Cooperativos AF com Amplificadores de PotÃncia NÃo Linearesâ |
title_full |
AnÃlise de Sistemas OFDM Cooperativos AF com Amplificadores de PotÃncia NÃo Linearesâ |
title_fullStr |
AnÃlise de Sistemas OFDM Cooperativos AF com Amplificadores de PotÃncia NÃo Linearesâ |
title_full_unstemmed |
AnÃlise de Sistemas OFDM Cooperativos AF com Amplificadores de PotÃncia NÃo Linearesâ |
title_sort |
AnÃlise de Sistemas OFDM Cooperativos AF com Amplificadores de PotÃncia NÃo Linearesâ |
author |
Eder Jacques Porfirio Farias |
author_facet |
Eder Jacques Porfirio Farias |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Andrà Lima FÃrrer de Almeida |
dc.contributor.advisor1ID.fl_str_mv |
77024494387 |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/1183830514857314 |
dc.contributor.authorID.fl_str_mv |
66213878300 |
dc.contributor.authorLattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4426514E8 |
dc.contributor.author.fl_str_mv |
Eder Jacques Porfirio Farias |
contributor_str_mv |
Andrà Lima FÃrrer de Almeida |
dc.subject.por.fl_str_mv |
TeleinformÃtica Sistemas de comunicaÃÃo sem fio |
topic |
TeleinformÃtica Sistemas de comunicaÃÃo sem fio Selection Combining MÃltiplos Relays Cooperative Communications Nonlinear Power Amplifier Optimum Receiver Outage Probability ENGENHARIAS |
dc.subject.eng.fl_str_mv |
Selection Combining MÃltiplos Relays Cooperative Communications Nonlinear Power Amplifier Optimum Receiver Outage Probability |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS |
dc.description.sponsorship.fl_txt_mv |
CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior |
dc.description.abstract..fl_txt_mv |
Cooperation diversity and orthogonal frequency division multiplexing (OFDM) are two key technologies for the modern wireless communication systems. The cooperative communication systems considered through this work use the OFDM technology and they are composed of: one transmitter with a nonlinear power amplifier (PA), one or more amplify-and-forward (AF) relays, also having a nonlinear PAs, and one destination node. In this dissertaion, it is initially proposed an optimal receiver, in the signal to noise ratio (SNR) sense, for a nonlinear cooperative AF system. The proposed receiver uses the maximum ratio combining (MRC) diversity technique to combine the received signas, assuming that both the source-destination and source-relay-destination links are available. In the sequel, closed-form expressions for the instantaneous SNR and outage probability of the considered system are developed. The outage analysis is then extended to the case of a multi-hop system, that is, with multiple serial relays. Finally, an outage analysis is also proposed for a nonlinear AF OFDM system using a Selection Combining receiver, considering two cases: one relay and multiple parallel relays. Numerical simulation results are presented through the work, evaluating the performance of the proposed receiver and theoretical expressions. |
dc.description.abstract.por.fl_txt_mv |
A diversidade cooperativa e a multiplexaÃÃo por divisÃo de frequÃncias ortogonais (Orthogonal Frequency Division Multiplexing - OFDM) sÃo duas das principais tecnologias para os sistemas de comunicaÃÃo sem fio modernos. Os sistemas de comunicaÃÃo cooperativos considerados neste trabalho de dissertaÃÃo utilizam a tecnologia OFDM e possuem: uma fonte com amplificador de potÃncia nÃo linear, um ou mais repetidores (relays) do tipo amplifica-e-encaminha (Amplify-and-Forward - AF), tambÃm com amplificadores de potÃncia (Power Amplifier - PA) nÃo lineares, e um nà destino. PropÃe-se inicialmente um receptor Ãtimo, no sentido da razÃo sinal ruÃdo (Signal-to-Noise Ratio - SNR) para um sistema OFDM cooperativo nÃo linear. Usando a tÃcnica de diversidade por combinaÃÃo de razÃo mÃxima (Maximal Ratio Combining - MRC) para tratar os sinais recebidos, o receptor proposto considera tanto as informaÃÃes oriundas do caminho direto (fonte-destino) como as provenientes do repetidor. Posteriormente, sÃo apresentadas expressÃes para o cÃlculo da SNR instantÃnea e da probabilidade de outage do sistema proposto. Fez-se ainda, uma proposta de expressÃo para o cÃlculo da probabilidade de outage do sistema considerando mÃltiplos relays em sÃrie. Por fim, propÃe-se expressÃes para o cÃlculo da probabilidade de outage do sistema utilizando receptor Selection Combining para um e para mÃltiplos relays dispostos paralelamente. Resultados de simulaÃÃo sÃo apresentados durante todo o trabalho, evidenciando o desempenho do receptor e das expressÃes propostas. |
description |
Cooperation diversity and orthogonal frequency division multiplexing (OFDM) are two key technologies for the modern wireless communication systems. The cooperative communication systems considered through this work use the OFDM technology and they are composed of: one transmitter with a nonlinear power amplifier (PA), one or more amplify-and-forward (AF) relays, also having a nonlinear PAs, and one destination node. In this dissertaion, it is initially proposed an optimal receiver, in the signal to noise ratio (SNR) sense, for a nonlinear cooperative AF system. The proposed receiver uses the maximum ratio combining (MRC) diversity technique to combine the received signas, assuming that both the source-destination and source-relay-destination links are available. In the sequel, closed-form expressions for the instantaneous SNR and outage probability of the considered system are developed. The outage analysis is then extended to the case of a multi-hop system, that is, with multiple serial relays. Finally, an outage analysis is also proposed for a nonlinear AF OFDM system using a Selection Combining receiver, considering two cases: one relay and multiple parallel relays. Numerical simulation results are presented through the work, evaluating the performance of the proposed receiver and theoretical expressions. |
publishDate |
2013 |
dc.date.issued.fl_str_mv |
2013-07-26 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
status_str |
publishedVersion |
format |
masterThesis |
dc.identifier.uri.fl_str_mv |
http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10366 |
url |
http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10366 |
dc.language.iso.fl_str_mv |
por |
language |
por |
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.publisher.none.fl_str_mv |
Universidade Federal do Cearà |
dc.publisher.program.fl_str_mv |
Programa de PÃs-GraduaÃÃo em Engenharia de TeleinformÃtica |
dc.publisher.initials.fl_str_mv |
UFC |
dc.publisher.country.fl_str_mv |
BR |
publisher.none.fl_str_mv |
Universidade Federal do Cearà |
dc.source.none.fl_str_mv |
reponame:Biblioteca Digital de Teses e Dissertações da UFC instname:Universidade Federal do Ceará instacron:UFC |
reponame_str |
Biblioteca Digital de Teses e Dissertações da UFC |
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Biblioteca Digital de Teses e Dissertações da UFC |
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Universidade Federal do Ceará |
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UFC |
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UFC |
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mail@mail.com |
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