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Presentation
Presentation
The scope of this unit encompasses the study of Microwave Radio Links, as a fundamental element of Telecommunications Networks. Technical elements are addressed, namely, attenuation, reflection, dispersion and fading, as well as the strategies to mitigate them, in a normative ITU-R context. Moreover, the design component arises as an element that links the physical phenomena with the normative context and the concepts of service quality, reliability, and cost benefit analysis. The pertinence of this unit is the clear: (i) Microwave Links are still widely used in Telecommunications Networks, in both temporary and permanent connections, namely, when the latter are placed in difficult access terrain, areas with low client density, or unstable geopolitical scenarios. (ii) The physical challenges of Microwave links are in all similar to those of Satellite Links.
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Class from course
Class from course
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Degree | Semesters | ECTS
Degree | Semesters | ECTS
Bachelor | Semestral | 6
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Year | Nature | Language
Year | Nature | Language
3 | Mandatory | Português
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Code
Code
ULHT2531-16931
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Prerequisites and corequisites
Prerequisites and corequisites
Not applicable
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Professional Internship
Professional Internship
Não
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Syllabus
Syllabus
Content description Introduction to Microwave Radio Links Motivation and objectives; Propagation: Physical mechanisms propagation and attenuation of links; Fading: Causes and models for the description of this phenomenon Passive and Active Relay Stations Framing and application; Diversity, combination and equalization Strategies for mitigating the effects of fading; Digital Modulations Modulations commonly applied in microwave links, and their respective error rate analysis; Design of a Microwave Link Analysis of the technical constrains; Cost/benefit analysis;
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Objectives
Objectives
It is intended that the student acquires the technical skills to, in an autonomous way, be able to plan a microwave radio link, analogic or digital, accounting for the different design aspects. The student will be able to account for the effects of attenuation, in its multiple forms, i.e., reflections, dispersion and fading. Finally, the student will be able to estimate installations and exploration costs and return rates. The main skills developed throughout the course are: 1. Familiarization with the basic concepts for the analysis and planning of microwave radio links; 2. Familiarization with the specific constrains and ITU-R norms for microwave radio links; 3. Familiarization with software tools for project support, namely "Google Earth" for station positioning; "Mathematica", "Matlab" and "Excel" for the calculation of operating margins; 4. Familiarization with the concepts of quality of service, reliability, user, and cost/performance ratio of a communications system;
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Teaching methodologies
Teaching methodologies
Supply of a set of study material, in digital form, namely, slides and exercices. Use of simulation software.
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References
References
Salema, Carlos - Feixes Hertzianos. 3ª edição. Lisboa :IST Press, 2011. Capa Mole. 978-972-8469-21-4. Smith, David R. - Digital Transmission Systems. 3rd edition, US: Springer, 2004. Capa Dura. 978-1-4419-8933-8.
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Assessment
Assessment
As componentes de avaliação são as seguintes:
Projecto (50% da Nota Final):
- Projecto de um feixe hertziano, com percurso a definir pelo docente, utilizando os conhecimentos leccionados nas aulas teóricas, a entregar no final do período lectivo.
- Nota mínima: 10.0 valores.Prova Teórica (50% da Nota Final):
- Frequência, no final do período lectivo, abrangendo a totalidade da matéria das aulas teóricas, ou exame nas épocas previstas nos regulamentos.
- Prova oral, que poderá ser realizada para confirmar qualquer nota obtida na avaliação escrita
- Nota mínima: 10.0 valores.
O acesso à Época Especial de Laboratório está devidamente condicionado ao disposto no Regulamento das Unidades Curriculares com Forte Componente Laboratorial.
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Mobility
Mobility
No
