Visible light communications: analysis of cooperative communication and amplification
Wireless radio frequency (RF) communication has seen an enormous growth in the last decade, with users enjoying its high data rates and convenience. However, as the demand of mobile users and devices employed in the Internet of Things grows, the use of the radio frequency spectrum approaches saturat...
| Autor principal: | Oliveira, Marcelo de |
|---|---|
| Formato: | Tese |
| Idioma: | Inglês |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2022
|
| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/29355 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| id |
riut-1-29355 |
|---|---|
| recordtype |
dspace |
| spelling |
riut-1-293552022-09-22T06:07:39Z Visible light communications: analysis of cooperative communication and amplification Comunicações por luz visível: análise de comunicação cooperativa e amplificação Oliveira, Marcelo de Pohl, Alexandre de Almeida Prado https://orcid.org/0000-0003-1300-4679 http://lattes.cnpq.br/9118815178885363 Monteiro, Paulo Miguel Nepomuceno Pereira https://orcid.org/0000-0003-4664-9238 Pohl, Alexandre de Almeida Prado https://orcid.org/0000-0003-1300-4679 http://lattes.cnpq.br/9118815178885363 Brante, Glauber Gomes de Oliveira http://lattes.cnpq.br/8347190422243353 Silva, Jair Adriano Lima https://orcid.org/0000-0003-2567-184X http://lattes.cnpq.br/3099010533644898 Vieira, Luis Carlos https://orcid.org/0000-0003-4531-4428 http://lattes.cnpq.br/4120062697064797 Alves, Luis Filipe Mesquita Nero Moreira https://orcid.org/0000-0002-8071-9546 Sistemas de comunicação sem fio Sistemas de comunicação móvel Métodos de Simulação Desempenho - Análise Amplificadores ópticos Internet das coisas Detectores ópticos Dispositivos optoeletrônicos Wireless communication systems Mobile communication systems Simulation methods Performance - Analysis Optical amplifiers Internet of things Optical detectors Optoelectronic devices CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA Engenharia Elétrica Wireless radio frequency (RF) communication has seen an enormous growth in the last decade, with users enjoying its high data rates and convenience. However, as the demand of mobile users and devices employed in the Internet of Things grows, the use of the radio frequency spectrum approaches saturation. In search for new solutions, visible light communication (VLC) emerges as a potential technology that exploit the visible spectrum to transmit information. However, despite its advantages, VLC still presents limitations that must be addressed before it is deployed in the real world. In this sense, this work contributes with the development of VLC systems by means of a versatile simulation model that enables the calculation of performance parameters, such as received power, signal-to-noise ratio (SNR), bit error rate (BER) and error vector magnitude (EVM) in customizable environments. The model is then employed to evaluate relay-assisted cooperative VLC links, in which, besides the source and the destination, a relay node is added to the path to support communication. This is accomplished by using the amplify-and-forward technique at the relay node, where the source signal is amplified and retransmitted to the destination, at which point both source and relay signals are combined and processed. Simulation results show that cooperation improves the link performance and even allow communication in cases where it wouldn’t originally be feasible. Besides simulations, the cooperative VLC links were tested experimentally. Using different path configurations it is demonstrated that SNR improves by an amount varying from 4 to 8 dB and BER results improves by up to one order of magnitude. As amplification is an important aspect of the employed amplify-and-forward technique, a simulation of optical and electrical amplification in VLC links is also accomplished. A comparison of both schemes is presented with results showing that the performance of an optical amplifier of 3.7 dB is comparable to a gain of 50 dB solely in the electrical domain. Finally, a specific application of VLC in the transmission of standard downlink mobile signals for LTE (4G) and 5G is evaluated. Experimental results show EVM values of 7 and 12 dB below the EVM limit for 4G and 5G, respectively, at 3 m distance. Conselho Nacional do Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Comunicações sem fio por radiofrequência (RF) têm visto um grande crescimento na última década, onde usuários usufruem de altas taxas de dados e conveniência. No entanto, enquanto a demanda por recursos sem fios cresce, seja de usuários móveis ou de dispositivos da Internet das Coisas, essa faixa de espectro se aproxima da saturação. Na busca por novas soluções, as comunicações por luz visível (visible light communications VLC) emergem como uma potencial tecnologia, explorando o espectro visível para transmitir informação. Porém, apesar de suas vantagens, o VLC ainda apresenta desafios que devem ser superados antes de sua aplicação no mundo real. Neste sentido, este trabalho contribui para o desenvolvimento de sistemas VLC por meio de um modelo de simulação versátil que permite o cálculo de parâmetros de desempenho, tais como potência recebida, razão sinal-ruído (signal-to-noise ratio – SNR), taxa de erro de bit (bit error rate – BER) e magnitude vetorial do erro (error vector magnitude – EVM), em ambientes personalizáveis. O modelo é então empregado para analisar enlaces VLC auxiliados por relay em que, além da fonte e do destino, um nó de relay é incluído no percurso para auxiliar o enlace de comunicação. Isso é alcançado por meio da técnica amplify-and-forward no nó relay, em que o sinal da fonte é amplificado e retransmitido para o destino, onde os sinais da fonte e relay são combinados e processados. Resultados de simulação mostram que a cooperação melhora o desempenho do enlace e pode permitir a comunicação em cenários em que originalmente não seria possível. Além de simulações, os enlaces VLC com cooperação foram testados experimentalmente. Empregando diferentes configurações de percurso, é demonstrado que valores de SNR melhoram entre 4 e 8 dB e valores de BER melhoram em até uma ordem de magnitude. Como amplificação é um importante aspecto da cooperação amplify-and-forward empregada, simulações de amplificação óptica e elétrica no VLC também são desenvolvidas. Uma comparação de ambas as técnicas é apresentada, com resultados mostrando que o desempenho de um amplificador óptico de 3.7 dB é comparável a um ganho de 50 dB apenas no domínio elétrico. Por fim, uma aplicação específica do VLC, o seu uso na transmissão de sinais downlink de padrões de redes móveis LTE (4G) e 5G, é avaliada. Resultados experimentais mostram valores de EVM de 7 e 12 dB abaixo do EVM limite, para 4G e 5G respectivamente, à distância de 3 m. 2022-08-22T19:07:24Z 2022-08-22T19:07:24Z 2022-05-24 doctoralThesis OLIVEIRA, Marcelo de. Visible light communications: analysis of cooperative communication and amplification. 2022. Tese (Doutorado em Engenharia Elétrica e Informática Industrial) - Universidade Tecnológica Federal do Paraná, Curitiba, 2022. http://repositorio.utfpr.edu.br/jspui/handle/1/29355 eng openAccess http://creativecommons.org/licenses/by/4.0/ application/pdf Universidade Tecnológica Federal do Paraná Curitiba Brasil Programa de Pós-Graduação em Engenharia Elétrica e Informática Industrial UTFPR |
| institution |
Universidade Tecnológica Federal do Paraná |
| collection |
RIUT |
| language |
Inglês |
| topic |
Sistemas de comunicação sem fio Sistemas de comunicação móvel Métodos de Simulação Desempenho - Análise Amplificadores ópticos Internet das coisas Detectores ópticos Dispositivos optoeletrônicos Wireless communication systems Mobile communication systems Simulation methods Performance - Analysis Optical amplifiers Internet of things Optical detectors Optoelectronic devices CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA Engenharia Elétrica |
| spellingShingle |
Sistemas de comunicação sem fio Sistemas de comunicação móvel Métodos de Simulação Desempenho - Análise Amplificadores ópticos Internet das coisas Detectores ópticos Dispositivos optoeletrônicos Wireless communication systems Mobile communication systems Simulation methods Performance - Analysis Optical amplifiers Internet of things Optical detectors Optoelectronic devices CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA Engenharia Elétrica Oliveira, Marcelo de Visible light communications: analysis of cooperative communication and amplification |
| description |
Wireless radio frequency (RF) communication has seen an enormous growth in the last decade, with users enjoying its high data rates and convenience. However, as the demand of mobile users and devices employed in the Internet of Things grows, the use of the radio frequency spectrum approaches saturation. In search for new solutions, visible light communication (VLC) emerges as a potential technology that exploit the visible spectrum to transmit information. However, despite its advantages, VLC still presents limitations that must be addressed before it is deployed in the real world. In this sense, this work contributes with the development of VLC systems by means of a versatile simulation model that enables the calculation of performance parameters, such as received power, signal-to-noise ratio (SNR), bit error rate (BER) and error vector magnitude (EVM) in customizable environments. The model is then employed to evaluate relay-assisted cooperative VLC links, in which, besides the source and the destination, a relay node is added to the path to support communication. This is accomplished by using the amplify-and-forward technique at the relay node, where the source signal is amplified and retransmitted to the destination, at which point both source and relay signals are combined and processed. Simulation results show that cooperation improves the link performance and even allow communication in cases where it wouldn’t originally be feasible. Besides simulations, the cooperative VLC links were tested experimentally. Using different path configurations it is demonstrated that SNR improves by an amount varying from 4 to 8 dB and BER results improves by up to one order of magnitude. As amplification is an important aspect of the employed amplify-and-forward technique, a simulation of optical and electrical amplification in VLC links is also accomplished. A comparison of both schemes is presented with results showing that the performance of an optical amplifier of 3.7 dB is comparable to a gain of 50 dB solely in the electrical domain. Finally, a specific application of VLC in the transmission of standard downlink mobile signals for LTE (4G) and 5G is evaluated. Experimental results show EVM values of 7 and 12 dB below the EVM limit for 4G and 5G, respectively, at 3 m distance. |
| format |
Tese |
| author |
Oliveira, Marcelo de |
| author_sort |
Oliveira, Marcelo de |
| title |
Visible light communications: analysis of cooperative communication and amplification |
| title_short |
Visible light communications: analysis of cooperative communication and amplification |
| title_full |
Visible light communications: analysis of cooperative communication and amplification |
| title_fullStr |
Visible light communications: analysis of cooperative communication and amplification |
| title_full_unstemmed |
Visible light communications: analysis of cooperative communication and amplification |
| title_sort |
visible light communications: analysis of cooperative communication and amplification |
| publisher |
Universidade Tecnológica Federal do Paraná |
| publishDate |
2022 |
| citation |
OLIVEIRA, Marcelo de. Visible light communications: analysis of cooperative communication and amplification. 2022. Tese (Doutorado em Engenharia Elétrica e Informática Industrial) - Universidade Tecnológica Federal do Paraná, Curitiba, 2022. |
| url |
http://repositorio.utfpr.edu.br/jspui/handle/1/29355 |
| _version_ |
1805306162996838400 |
| score |
10,814766 |