Transmitter for 5G systems

Detalhes bibliográficos
Autor(a) principal: Marques, Rúben Pereira
Data de Publicação: 2018
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/26933
Resumo: The current 4G systems are based on the OFDM modulation which, while providing great exibility and intricacy to the multipath propagation inherent in wireless systems, it has great variations in their temporal envelope which causes high PAPR and, consequently, obstacles in the PAs performance. In this sense, the emergence of 5G systems has given rise high hopes of reducing the above mentioned problems of 4G systems, allowing more eficient data transmission. In the simulation of wireless communication system there are two simulation domains that must be taken into account: the system analysis that allows the study of diferent modulations and the circuit analysis that, in turn, allows the study of nonlinear circuits, as is the case of PAs present in these systems. In this way, it becomes important to unite these two domains allowing the existence of a unifying simulation tool, which has been called the simulation platform. With this platform it is possible, besides joining two domains hitherto analyzed separately, not only to study the behaviour of a 5G system but also any other system due to its adaptability. Thus, the system analysis is performed with the help of MATLAB software, in which three types of digital modulation (QPSK, 16-QAM and 64-QAM modulation) will be studied along with OFDM modulation. For the circuit analysis it was used the ADS circuit simulation software, which will analyze the behavior of two types of PAs (a Class B and a Doherty). As a way of testing its functioning, the platform simulations were performed for three diferent con gurations: SISO, SISO in which the PA model was replaced by a polynomial approximation, and Alamouti 2x1 (particular case of the MISO con guration). Finally, the tests of functioning of the simulation platform are nalized with the comparison of the simulations using the BER
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spelling Transmitter for 5G systems5GOFDM modulationPower amplifierSimulation platformSISOAlamouti 2x1BERThe current 4G systems are based on the OFDM modulation which, while providing great exibility and intricacy to the multipath propagation inherent in wireless systems, it has great variations in their temporal envelope which causes high PAPR and, consequently, obstacles in the PAs performance. In this sense, the emergence of 5G systems has given rise high hopes of reducing the above mentioned problems of 4G systems, allowing more eficient data transmission. In the simulation of wireless communication system there are two simulation domains that must be taken into account: the system analysis that allows the study of diferent modulations and the circuit analysis that, in turn, allows the study of nonlinear circuits, as is the case of PAs present in these systems. In this way, it becomes important to unite these two domains allowing the existence of a unifying simulation tool, which has been called the simulation platform. With this platform it is possible, besides joining two domains hitherto analyzed separately, not only to study the behaviour of a 5G system but also any other system due to its adaptability. Thus, the system analysis is performed with the help of MATLAB software, in which three types of digital modulation (QPSK, 16-QAM and 64-QAM modulation) will be studied along with OFDM modulation. For the circuit analysis it was used the ADS circuit simulation software, which will analyze the behavior of two types of PAs (a Class B and a Doherty). As a way of testing its functioning, the platform simulations were performed for three diferent con gurations: SISO, SISO in which the PA model was replaced by a polynomial approximation, and Alamouti 2x1 (particular case of the MISO con guration). Finally, the tests of functioning of the simulation platform are nalized with the comparison of the simulations using the BEROs atuais sistemas 4G são baseados na modulação Orthogonal Frequency Division Multiplexing (OFDM) que apesar de garantir uma grande exibilidade e robustez à propagação multi-percurso inerente aos sistemas sem fi os, possui grandes variações nas respetivas envolventes temporais o que causa um elevado Peak-to-Average Power Ratio (PAPR) e, consequentemente, limitações no desempenho dos ampli cadores de potência (do inglês, Power Ampli ers (PAs)). Neste sentido, o aparecimento dos sistemas 5G têm suscitado grandes esperanças na redução dos problemas mencionados anteriormente, permitindo uma transmissão de dados mais e ficiente. Na simulação de um sistema de comunicações sem fi os há dois domínios de simulação principais que se devem ter em consideração: a análise de sistema que permite o estudo de diferentes modulações e a análise de circuito que, por sua vez, permite o estudo de circuitos não-lineares, como é o caso dos PAs presentes nestes sistemas. Desta forma, torna-se importante unir estes dois domínios possibilitando a existência de uma ferramenta de simulação unifi cadora, à qual se atribuiu a designação de plataforma de simulação. Com a plataforma de simulação consegue-se, além de unir dois domínios até agora analisados separadamente, não só estudar o comportamento de um sistema 5G mas também de qualquer outro devido à sua adaptabilidade. Assim, a análise de sistema é efetuada com o auxílio do software MATLAB, onde são estudados três tipos de modulação digital (modulação Quadrature Phase Shift Keying (QPSK), 16-Quadrature Amplitude Modulation (QAM) e 64-QAM) juntamente com a modulação OFDM. Para a análise de circuito recorreu-se ao software de simulação de circuitos Advanced Design System (ADS), onde se analisou o comportamento de dois tipos de PAs (um Classe B e um Doherty). Como forma de teste do funcionamento da plataforma, foi efetuada a simulação para três confi gurações diferentes: Single-Input Single-Output (SISO), SISO em que se substituiu o modelo do Power Ampli er (PA) por uma aproximação polinomial e Alamouti 2x1 (caso particular da configuração Multiple-Input Single-Output (MISO)). Por último, os testes do funcionamento da plataforma de simulação são fi nalizados com a comparação das simulações recorrendo ao Bit Error Rate (BER)2019-11-11T11:39:27Z2018-12-20T00:00:00Z2018-12-20info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10773/26933TID:202242064engMarques, Rúben Pereirainfo: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:RCAAP2024-02-22T11:52:11Zoai:ria.ua.pt:10773/26933Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:59:50.117594Repositório 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 Transmitter for 5G systems
title Transmitter for 5G systems
spellingShingle Transmitter for 5G systems
Marques, Rúben Pereira
5G
OFDM modulation
Power amplifier
Simulation platform
SISO
Alamouti 2x1
BER
title_short Transmitter for 5G systems
title_full Transmitter for 5G systems
title_fullStr Transmitter for 5G systems
title_full_unstemmed Transmitter for 5G systems
title_sort Transmitter for 5G systems
author Marques, Rúben Pereira
author_facet Marques, Rúben Pereira
author_role author
dc.contributor.author.fl_str_mv Marques, Rúben Pereira
dc.subject.por.fl_str_mv 5G
OFDM modulation
Power amplifier
Simulation platform
SISO
Alamouti 2x1
BER
topic 5G
OFDM modulation
Power amplifier
Simulation platform
SISO
Alamouti 2x1
BER
description The current 4G systems are based on the OFDM modulation which, while providing great exibility and intricacy to the multipath propagation inherent in wireless systems, it has great variations in their temporal envelope which causes high PAPR and, consequently, obstacles in the PAs performance. In this sense, the emergence of 5G systems has given rise high hopes of reducing the above mentioned problems of 4G systems, allowing more eficient data transmission. In the simulation of wireless communication system there are two simulation domains that must be taken into account: the system analysis that allows the study of diferent modulations and the circuit analysis that, in turn, allows the study of nonlinear circuits, as is the case of PAs present in these systems. In this way, it becomes important to unite these two domains allowing the existence of a unifying simulation tool, which has been called the simulation platform. With this platform it is possible, besides joining two domains hitherto analyzed separately, not only to study the behaviour of a 5G system but also any other system due to its adaptability. Thus, the system analysis is performed with the help of MATLAB software, in which three types of digital modulation (QPSK, 16-QAM and 64-QAM modulation) will be studied along with OFDM modulation. For the circuit analysis it was used the ADS circuit simulation software, which will analyze the behavior of two types of PAs (a Class B and a Doherty). As a way of testing its functioning, the platform simulations were performed for three diferent con gurations: SISO, SISO in which the PA model was replaced by a polynomial approximation, and Alamouti 2x1 (particular case of the MISO con guration). Finally, the tests of functioning of the simulation platform are nalized with the comparison of the simulations using the BER
publishDate 2018
dc.date.none.fl_str_mv 2018-12-20T00:00:00Z
2018-12-20
2019-11-11T11:39:27Z
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/10773/26933
TID:202242064
url http://hdl.handle.net/10773/26933
identifier_str_mv TID:202242064
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
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
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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
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