Proceedings of the Second International Mobile Satellite Conference (IMSC 1990)

Presented here are the proceedings of the Second International Mobile Satellite Conference (IMSC), held June 17-20, 1990 in Ottawa, Canada. Topics covered include future mobile satellite communications concepts, aeronautical applications, modulation and coding, propagation and experimental systems, mobile terminal equipment, network architecture and control, regulatory and policy considerations, vehicle antennas, and speech compression

Analisador de espectros portátil para RF usando Arduino

Mestrado em Engenharia Eletrónica e TelecomunicaçõesRadio frequency term refers to the electromagnetic spectrum bandwidth used to transmission of electromagnetic signals trough free space. The human knowledge about this phenomena turns possible to set wireless communications between electronic devices. The analysis of that spectrum is demanding in order to achieve proper communications between those devices. Whit spectrum analysers is possible to observe some physical characteristics of the communication. The aim of this document is to furnish information about the project, design and implementation of a spectrum analyser using open source digital control technology, Arduino.Rádio-frequência é o termo utilizado para designar a gama de frequêcias utilizadas na transmissão de sinais eletromagnéticos, através do meio livre. O domínio deste fenómeno possibilita a que dispositivos eletrónicos possam comunicar sem fios. A análise do espectro eletromagnético utilizado pelos diferentes dispositivos que coabitam no dia a dia, é essencial para possibilitar o correcto funcionamento de todos. Para tal, são utilizados analisadores de espectro, que com os quais se pode monitorizar algumas das características físicas das comunicações sem fios. O objetivo deste trabalho é documentar o projeto, implementação e testes de validação de um analisador de espectros portátil para rádio-frequência utilizando tecnologia de controlo digital opensource, Arduino

Telecommunication Systems

This book is based on both industrial and academic research efforts in which a number of recent advancements and rare insights into telecommunication systems are well presented. The volume is organized into four parts: "Telecommunication Protocol, Optimization, and Security Frameworks", "Next-Generation Optical Access Technologies", "Convergence of Wireless-Optical Networks" and "Advanced Relay and Antenna Systems for Smart Networks." Chapters within these parts are self-contained and cross-referenced to facilitate further study

Impedance Transformers

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EUROSENSORS XVII : book of abstracts

Fundação Calouste Gulbenkien (FCG).Fundação para a Ciência e a Tecnologia (FCT)

Dual-Use Space Technology Transfer Conference and Exhibition

This document contains papers presented at the Dual-Use Space Technology Transfer Conference and Exhibition held at the Johnson Space Center February 1-3, 1994. Possible technology transfers covered during the conference were in the areas of information access; innovative microwave and optical applications; materials and structures; marketing and barriers; intelligent systems; human factors and habitation; communications and data systems; business process and technology transfer; software engineering; biotechnology and advanced bioinstrumentation; communications signal processing and analysis; new ways of doing business; medical care; applications derived from control center data systems; human performance evaluation; technology transfer methods; mathematics, modeling, and simulation; propulsion; software analysis and decision tools systems/processes in human support technology; networks, control centers, and distributed systems; power; rapid development perception and vision technologies; integrated vehicle health management; automation technologies; advanced avionics; ans robotics technologies. More than 77 papers, 20 presentations, and 20 exhibits covering various disciplines were presented b experts from NASA, universities, and industry