Point To Point Radio Systems
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Heuristics for the optimized deployment of small cells in next-generation networks
Abstract Heterogeneous Networks (HetNets) have been introduced as an alternative means of improving the overall network capacity. However, HetNets increase the complexity and cost of transport due to the large number of smallcells (SCs) that have to be connected, and hence, it is essential to investigate the best way to plan the joint deployment of radio and
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-09
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2. Metodologia para aplicação de RFID em automação : estudo de caso em um sistema de gestão / Methodology for RFID implementation in automation : case study in a management system
Radio-frequency identification (RFID) is an emerging technology with enormous potential for application. It can be used where there is a need to identify distant objects, wirelessly, with data transmission via radio signals, followed by its storage and process on computer systems, making them available for future use. As its applications permeates many busin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/07/2012
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3. Projeto de sistemas de comunicação microondas : rádio ponto a ponto
Hoje em dia as pessoas necessitam serviços de comunicação móveis, seguros e confiáveis. Quase todo mundo tem um telefone celular e não pode viver sem ele sem ter de reorganizar não só a vida profissional, mas também a pessoal. Neste mundo em que ninguém pode parar ou esperar para receber uma resposta, onde tudo tem de ser em tempo real, onde tempo
Publicado em: 2010
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4. Strategy of monitoring and automation in irrigation systems using communication devices in wireless sensor network / Estratégia de monitoramento e automação em sistemas de irrigação utilizando dispositivos de comunicação em redes de sensores sem fio
The goal of this study was to develop strategies for monitoring and automated irrigation systems using FDR capacitance sensors to collect data of water content in the soil through Wireless Sensor Network (WSN). The FDR capacitance sensors were developed in the Department of Agricultural Engineering (DENA) pertain UFC. Were used 14 FDR capacitance sensors and
Publicado em: 2009
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5. Determination fo the configuration of excited Alfvén waves in tokamak TCABR / Determinação da configuração de ondas de alfvén excitadas no tokamak TCABR
In order to enhance the efficiency of the TCABRs Alfvén waves heating system, called AWES - Alfvén Waves Excitement System a diagnostics for determining the radio-frequency power applied to the plasma and a processing circuit for the magnetic coil system was built, characterized, installed and put into operation. The RF diagnostics system was designed to d
Publicado em: 2007
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6. MÉTODOS PARA A AVALIAÇÃO DA EFICIÊNCIA DE UTILIZAÇÃO DO ESPECTRO RADIOELÉTRICO / METHODS FOR ASSESSMENT OF THE RADIO SPECTRUM USE EFFICIENCY
In this work a new method for the assessment of the spectrum use efficiency is proposed to be applied to point-area, including broadcasting, and point-to-point telecommunications systems. The proposed definition of the efficiency index is based in technical aspects, but other subjects that affect the determination of a telecommunications system efficiency, a
Publicado em: 2006
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7. PLANEJAMENTO DE SISTEMAS FIXOS PARA ACESSO SEM FIO EM FAIXA LARGA OPERANDO EM AMBIENTES ABERTOS EM FREQÜÊNCIAS ENTRE 10 E 66 GHZ / PLANNING OF OUTDOOR BROADBAND FIXED WIRELESS ACCESS SYSTEMS OPERATING AT 10-66 GHZ BAND
The development of outdoor fixed broadband wireless access (BWA) systems operating at 10-66 GHz frequency requires a carefully planning in order to maximizing the use of the bandwidth, maximizing network capacity, assuring minimum requirements of availability and minimizing costs in an environment and in a frequency band where the propagation of electromagne
Publicado em: 2006
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8. Utilização do módulo "creatalink" para a transmissão, em tempo real, de sinais de correção para sistemas GPS diferenciais (DGPS) / Use of creatalink module to transmit in real time corrections signals for differential GPS (DGPS) systems
GPS is a radio navigation system base on a satellite network providing 24 hours radio data to determine point coordinates and world wide coverage. The precision is in the decametric range which is not adequate to many applications. DGPS or Differential GPS is a technique used to improve this precision down to metric level adding informa-tion to the receiver.
Publicado em: 2005
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9. MODELLING TO RAIN ATTENUATION EFECTS IN POINT-TO-POINT AND POINT-TO-MULTIPOINT TERRESTRIAL LINKS / MODELAMENTO DE EFEITOS DE ATENUAÇÃO POR CHUVAS EM ENLACES TERRESTRES PONTO-A-PONTO E PONTO-MULTIPONTO
The growing demand for broadband services such as high- speed data, video, audio and multimedia, has lead to the use of point-multipoint radio systems operating in frequencies above of 10 GHz, that are not yet allocated for other services and allow the use of the large bandwidths required by these services. At these frequencies, the main contribution for the
Publicado em: 2003
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10. Novela das oito e suas estratégias de textualização. Terra Nostra: a saga ressemantizadora
"8 o clock soap opera and its strategies of textualization. Terra Nostra: the resemanticizing saga" has as central proposal to investigate in what measure the discoursive strategies and chiefly in what degree the components of syntax and the elements of semantic that belong to the discoursive level contribute for the conquest and the maintenance of the audie
Publicado em: 2001
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11. Equalização adaptativa em sistemas radio-digitais : das tecnicas em frequencia a teoria da desconvolução autodidata
Equalization in microwave digital-radio transmission systems is dealt with under a transient and steady-state point of view. The c1assical theory of digital transversal equalization is revisited and complemented concerning the c1assical aspects of mean square error minimization (MSEM) and zero forcing (ZF), and also in the proposal of an algorithm for the ad
Publicado em: 1992
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12. STATISTICAL APPROXIMATION TO THE PROBLEM OF PROPAGATION IN POINT-AREA TYPE SYSTEMS / APROXIMAÇÃO ESTATÍSTICA AO PROBLEMA DA PROPAGAÇÃO EM SISTEMAS DO TIPO PONTE-ÁREA
Este trabalho trata do problema da propagação da energia em sistemas do tipo ponto-área. É desenvolvida uma análise estatística, tomando por base medidas efetuadas em 321 pontos escolhidos ao acaso na cidade do Rio de Janeiro e suas vizinhanças. A parte experimental utilizou os sinais recebidos dos canais 4 e 13 das emissoras de televisão do Rio de J
Publicado em: 1974