Pedro Paulo S. Xavier

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Effects of four urban areas of the city of Rio de Janeiro, Brazil, on the propagation channels of three land mobile satellite systems are analyzed using computer simulation. Initially, a digital elevation model, building databases, and a vegetation model are processed to generate azimuth-elevation maps of three path states (clear, shadowed, and blocked) for(More)
Effects of different urban areas on propagation channels of land mobile satellite systems are analyzed using simulation. Initially, a digital elevation model, building databases and a vegetation model are processed to generate azimuthelevation maps of path states (clear, shadowed and blocked) for observers. At each simulation step, satellite positions are(More)
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