All digital ambient Backscatter

Detalhes bibliográficos
Autor(a) principal: Torres, Ricardo Miguel André
Data de Publicação: 2020
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/30688
Resumo: We live in an era where the need to monitor our surroundings is a crucial aspect in daily life. Many examples can be given, which originated the concepts of smart cities, smart farms and other \smart" things. The scaling up of these devices from a few million to many billions originated a new area of interest which focus on the optimization of how monitoring devices transmit information. The traditional approach was to use an active radio for each device, but due to the high power consumption and cost requirement a new wave of backscatter radios has been under development. The most common architecture for backscatter radios is based in analog circuits however, it is also possible to use an all-digital approach which is not widely used. During this work, different kinds of Microcontroller Unit (MCU) were tested in order to measure and study their response when exposed to electromagnetic waves. Even though not all MCU are suitable for all-digital backscatter, many of them proved to be good solutions to implement this technology. Besides the all-digital approach, this work also focus on ambient backscatter. It consists in reusing electromagnetic waves such as Frequency Modulated (FM) radio signals, which after some tests proved to be the most suitable for this application. In a glance, this work presents an all-digital ambient backscatter system, considering the use of FM waves, the development of an all-digital backscatter tag, and a receiver based on SDR. The final results show that the developed devices are able to receive, modulate, transmit, demodulate and process data.
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spelling All digital ambient BackscatterAmbient backscatter communicationSoftware defined radioLow power communicationWe live in an era where the need to monitor our surroundings is a crucial aspect in daily life. Many examples can be given, which originated the concepts of smart cities, smart farms and other \smart" things. The scaling up of these devices from a few million to many billions originated a new area of interest which focus on the optimization of how monitoring devices transmit information. The traditional approach was to use an active radio for each device, but due to the high power consumption and cost requirement a new wave of backscatter radios has been under development. The most common architecture for backscatter radios is based in analog circuits however, it is also possible to use an all-digital approach which is not widely used. During this work, different kinds of Microcontroller Unit (MCU) were tested in order to measure and study their response when exposed to electromagnetic waves. Even though not all MCU are suitable for all-digital backscatter, many of them proved to be good solutions to implement this technology. Besides the all-digital approach, this work also focus on ambient backscatter. It consists in reusing electromagnetic waves such as Frequency Modulated (FM) radio signals, which after some tests proved to be the most suitable for this application. In a glance, this work presents an all-digital ambient backscatter system, considering the use of FM waves, the development of an all-digital backscatter tag, and a receiver based on SDR. The final results show that the developed devices are able to receive, modulate, transmit, demodulate and process data.Vivemos numa época em que a necessidade de monitorizar o que nos rodeia é um aspeto crucial na vida quotidiana. Muitos exemplos podem ser dados, alguns originaram os conceitos de cidades inteligentes, agricultura inteligente e outras coisas "inteligentes". O aumento destes dispositivos de alguns milhões para muitos biliões deu origem a uma nova área de interesse, que se foca na otimização da forma como estes dispositivos de monitorização transmitem a sua informação. A abordagem tradicional utiliza um radio ativo para cada dispositivo, mas devido ao elevado consumo energético e custo associado, novas tecnologias têm vindo a ser desenvolvidas entre elas os rádios de backscatter. A arquitetura mais comum dos rádios de backscatter baseia-se em circuitos analógicos, no entanto, é também possível utilizar uma arquitetura totalmente digital. O foco desta dissertação é precisamente o desenvolvimento de um sistema de comunicação por backscatter totalmente digital baseado em microcontroladores, para isso, diferentes tipos de microcontroladores foram testados de forma a medir e estudar o seu comportamento quando iluminados com ondas eletromagnéticas. Apesar de algumas diferenças de desempenho entre microcontroladores, verificou-se que na maioria dos testes os microcontroladores têm um comportamento que viabiliza a comunicação backscatter podendo por isso serem utilizados no sistema de comunicação totalmente digital. Para além da abordagem totalmente digital, este trabalho também se concentra na ambient backscatter. Este método consiste na reutilização de ondas eletromagnéticas, tais como sinais de rádio modulados por frequência (FM), que após alguns testes provaram ser os mais adequados para esta aplicação. Em suma, este trabalho apresenta um sistema de ambient backscatter totalmente digital, considerando a utilização de ondas FM, o desenvolvimento de uma tag backscatter totalmente digital, e um recetor baseado em Software- Defined Radio (SDR). Os resultados finais mostram que os dispositivos desenvolvidos são capazes de receber, modular, transmitir, desmodular e processar dados.2021-02-24T15:07:32Z2020-11-26T00:00:00Z2020-11-26info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10773/30688engTorres, Ricardo Miguel Andréinfo: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:RCAAP2024-02-22T11:59:16Zoai:ria.ua.pt:10773/30688Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:02:43.006318Repositório 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 All digital ambient Backscatter
title All digital ambient Backscatter
spellingShingle All digital ambient Backscatter
Torres, Ricardo Miguel André
Ambient backscatter communication
Software defined radio
Low power communication
title_short All digital ambient Backscatter
title_full All digital ambient Backscatter
title_fullStr All digital ambient Backscatter
title_full_unstemmed All digital ambient Backscatter
title_sort All digital ambient Backscatter
author Torres, Ricardo Miguel André
author_facet Torres, Ricardo Miguel André
author_role author
dc.contributor.author.fl_str_mv Torres, Ricardo Miguel André
dc.subject.por.fl_str_mv Ambient backscatter communication
Software defined radio
Low power communication
topic Ambient backscatter communication
Software defined radio
Low power communication
description We live in an era where the need to monitor our surroundings is a crucial aspect in daily life. Many examples can be given, which originated the concepts of smart cities, smart farms and other \smart" things. The scaling up of these devices from a few million to many billions originated a new area of interest which focus on the optimization of how monitoring devices transmit information. The traditional approach was to use an active radio for each device, but due to the high power consumption and cost requirement a new wave of backscatter radios has been under development. The most common architecture for backscatter radios is based in analog circuits however, it is also possible to use an all-digital approach which is not widely used. During this work, different kinds of Microcontroller Unit (MCU) were tested in order to measure and study their response when exposed to electromagnetic waves. Even though not all MCU are suitable for all-digital backscatter, many of them proved to be good solutions to implement this technology. Besides the all-digital approach, this work also focus on ambient backscatter. It consists in reusing electromagnetic waves such as Frequency Modulated (FM) radio signals, which after some tests proved to be the most suitable for this application. In a glance, this work presents an all-digital ambient backscatter system, considering the use of FM waves, the development of an all-digital backscatter tag, and a receiver based on SDR. The final results show that the developed devices are able to receive, modulate, transmit, demodulate and process data.
publishDate 2020
dc.date.none.fl_str_mv 2020-11-26T00:00:00Z
2020-11-26
2021-02-24T15:07:32Z
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