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Authors
Advisor(s)
Abstract(s)
Nos dias que correm, a tecnologia de Feixes Hertzianos (FH), tem vindo a perder preponderância,
face a outras de outras maior débito como fibras óticas. Apesar de tudo, os FH continuam a ser utilizados em redes de transporte como backhaul e em redes de TV, pelo seu baixo custo e facilidade de integração em diversos tipos de terreno. Os sistemas funcionam, com a premissa de existir um caminho desobstruído entre o emissor e o recetor.
No dimensionamento dum sistema por FH, é necessário fazer um estudo prévio das condições de propagação e do percurso onde a ligação será estabelecida. Muita vezes o processo torna-se complexo, sendo necessário o auxilio de ferramentas. Muitas das ferramentas disponibilizadas são de acesso profissional e customizadas para definições especificas de fabricantes. Existem outras de utilização aberta, mas estas muitas vezes,
não são mantidas de forma regular, tornando-se desatualizadas, face às recomendações do ITU-R(International Telecommunication Union Radiocommunication).
Nesse seguimento, ao longo desta dissertação, foi desenvolvida uma ferramenta modular de código-aberto, com uma interface Web implementada com a framework javascript Vue.js e um web service na linguagem python. A ferramenta foi desenvolvida com base nas últimas recomendações ITU-R e nela é possível, analisar o impacto dos fenómenos de propagação na qualidade do sinal recebido. Com base no software desenvolvido,
foram apresentados um conjuntos de testes e cenários. Os resultados foram comparados com os dados da ferramenta profissional Path Loss de forma a aferir a validade do programa desenvolvido.
Nowadays the Microwave radio links technology has lost some preponderance compared to other technologies of high speed such as optical fibers. Despite everything, Microwave radio links, continues to be used in transport networks such as backhaul and television, due to their low cost and its simplicity of integration in different types of terrain. The system work in the context, that there is an unobstructed path between the sender and receiver. In the design of a Microwave Radio link system, it’s necessary to do a prior study of the propagation conditions and the path where the connection will be established. Sometimes the process becomes complex, being required the use of auxiliary tools. Most of the tools available, are for professional use and customized for specific manufacturers. There some free solutions, but those are not maintained, and become outdated compared to International Telecommunication Union - Radiocommunication (ITU-R). Having that in mind, during the process of this dissertation development, an opensource tool with a web-based JavaScript interface with the framework Vue.Js was implemented with the complement of a python webservice. The tool was created adopting the latest ITU-R recommendations and using it, is possible to evaluate the impact of the propagation phenoms on the quality of the received signal. Using the developed application, some use cases and tests were presented. The results were compared with the professional tool PathLoss to validate the developed software .
Nowadays the Microwave radio links technology has lost some preponderance compared to other technologies of high speed such as optical fibers. Despite everything, Microwave radio links, continues to be used in transport networks such as backhaul and television, due to their low cost and its simplicity of integration in different types of terrain. The system work in the context, that there is an unobstructed path between the sender and receiver. In the design of a Microwave Radio link system, it’s necessary to do a prior study of the propagation conditions and the path where the connection will be established. Sometimes the process becomes complex, being required the use of auxiliary tools. Most of the tools available, are for professional use and customized for specific manufacturers. There some free solutions, but those are not maintained, and become outdated compared to International Telecommunication Union - Radiocommunication (ITU-R). Having that in mind, during the process of this dissertation development, an opensource tool with a web-based JavaScript interface with the framework Vue.Js was implemented with the complement of a python webservice. The tool was created adopting the latest ITU-R recommendations and using it, is possible to evaluate the impact of the propagation phenoms on the quality of the received signal. Using the developed application, some use cases and tests were presented. The results were compared with the professional tool PathLoss to validate the developed software .
Description
Dissertação para obtenção do Grau de Mestre em Engenharia Eletrónica e Telecomunicações
Keywords
Feixes Hertzianos ITU-R Código-aberto Aplicação Planeamento Projeto Open-source Project Microwave radio link Design Application
Citation
BARBOSA, Milton Jorge Semedo - Aplicação para projeto e análise de sistemas de feixes Hertzianos. Lisboa: Instituto Superior de Engenharia de Lisboa, 2021. Dissertação de Mestrado
Publisher
Instituto Superior de Engenharia de Lisboa