Multipaths
Mostrando 1-3 de 3 artigos, teses e dissertações.
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1. Análise do desempenho do sistema brasileiro de TV digital sob condições adversas de recepção
The main objective of this work is to study and evaluate the receptions conditions of a Digital TV signal, modulated in Brazilian standard and received with the use of an internal and external antenna, to analyze and to study the interferences that affect it. Comparing the conditions for receipt of the theoretical model of Okumura Hata with real data collect
Publicado em: 2008
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2. New proposals for optmization of digital TV receivers based on OFDM in regional single frequency network environments / Novas propostas para otimização de receptores de TV digital baseados em OFDM em ambientes de redes de frequencia unica regionais
This thesis deals with the optimization of Digital TV receivers based on OFDM, with performance evaluation in regional single frequency networks (SFN). Such environment facilitates the channel distribution, however its characteristics degrade the receiver operation. Initially, projects of loop canceller filters in relay stations are treated, and they are nec
Publicado em: 2007
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3. UNDERWATER ACOUSTIC RECEPTION IN THE PRESENCE OF MULTIPATH / RECEPÇÃO ACÚSTICA SUBMARINA NA PRESENÇA DE MULTIPERCURSOS
A simple, low-cost and robust for the problem of multipath in underwater acoustic communication in deep water, is presented. Initially, a delay profile and noise level characterization, in offshore oil exploitation environments is done, with the objective of defining the communication channel of interest. The modulation techique, considered adequate by means
Publicado em: 1997