Apropiación social del conocimiento - i2T

URI permanente para esta colecciónhttp://hdl.handle.net/10906/78228

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Digital terrestrial television measurement and coverage models comparison: Evaluation of measurements and simulations on urban enviroment for DVB-T2 signals
(IEEE, 2016-06-26) Bernal, Marlon Patino
This paper presents the measurement process of DVB-T2 signal in an urban environment, and the simulations with a coverage calculation tool able to configure specific details of digital television signals and a detailed cartography. Empirical and simulations results are compared to determine additional settings and correction factors. Additional considerations to support signal planning processes are presented.
Heuristic UTD coefficients applied for the channel characterization in an andean scenario
(Institute of Electrical and Electronics Engineers Inc., 2015-07-19) Navarro Cadavid, Andres
This paper presents a comparison of three heuristic coefficients for the Uniform Theory of Diffraction (UTD), used to characterize the radiowave scattering in typical urban scenarios. The coefficients were implemented in a propagation model based on 3D ray-tracing techniques in an andean scenario. In order to evaluate each coefficient we analyze the statistical behavior of the mean and standard deviation of the absolute errors between the estimated values and the measured data of path loss in a large number of receptor points. Finally, we show the path loss prediction for each heuristic UTD coefficients proposed.