Signal Theory Telecommunications
Mostrando 1-3 de 3 artigos, teses e dissertações.
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1. The Use of Artificial Neural Networks in the Estimation of Coverage Digital TV Signal / A Utilização de Redes Neurais Artificiais na Estimação da Cobertura do Sinal de Televisão Digital
THIS works presents information about signal intensity obtained on field and from simulations for one-seg and full-seg receptions, the city of Goiania. The values obtained from measurements were used for a comparisson among propagation models that are presented in literature, and the goal is to determine the real condition of digital TV signal in the region
Publicado em: 2009
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2. Realizações de constelações de sinais hiperbolicas densas associadas a sistemas lineares atraves das funções automorfas
In this work we have introduced a transmission line as a hyperbolic modeling; we have constructed a signal constellation in the hyperbolic plane from regular tessellations such as the ones generated by {12g - 6, 3} ; we have established a procedure for couting the number of points of the constellations mentioned above. We have also presented the automorphic
Publicado em: 2005
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3. Modelo 2,5D de predição de propagação para ambientes interiores utilizando o método do traçado de raios
A 2.5D ray-tracing propagation model is proposed to predict radio loss in indoor environment. Specifically, we opted for the Shooting and Bouncing Rays (SBR) method, together with the Geometrieal Theory of Diffrartion (GTD). Besides the line-of-sight propagation (LOS), we consider that the radio waves may experience reflection, refraction, and diffraction (N
Publicado em: 2005