Encontrados 4 documentos, a visualizar página 1 de 1
Towards a New Baseband Processing Architecture for Next Generation Software-Def...
Nelson Silva; Arnaldo S. R. Oliveira; Nuno Borges de CarvalhoThe necessity for better radios with increased flexibility,easier design and verification led a paradigm shift infavour of the Software-Defined Radio (SDR). On the otherhand, the SDR implementation of Next Generation WirelessNetworks (NGWN) will require significantly higher power efficiency than current processors can provide.In this paper, we present a baseband processing architecturedesigned to shorten the ga...
Medidor de Campo electromagnético selectivo na frequência para as bandas GSM900...
Carlos José Borda; Rogério Paulo Dias; Nuno Borges de Carvalho; João Nuno MatosThis paper describes the design, implementation and test of a frequency selective electromagnetic field meter for the GSM900 and GSM1800 bands developed on an engineering degree final project.We will start to introduce all the necessary background concepts such as: biological effects of electromagnetic radiation and reference exposure levels, near and far field and power measuremen...
Alternativa ao SPICE para Simulação do Estado Estacionário de Circuitos Não Lin...
Nuno Borges de Carvalho; José Carlos PedroThe objective of this paper is to explain a new technique to simulate non-linear steady-state circuits that does not use time domain, like SPICE[12], but spectral domain to do the simulations.In this paper we develop a new frequency mapping technique to use in the discretization of continuous spectrum and a new tool to do convolution and deconvolution. Finally we prove the validity of this technique. ; Pr...
Network Adaptation Project for Broadband Amplifiers
Raquel Castro Madureira; Nuno Borges de Carvalho; José Carlos Pedro; Este trabalho visa a descrição de um método de projecto de malhas de adaptação para amplificadores de banda larga, que conduzam a um ganho de transdução constante numa banda previamente definida.
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