Medición, Caracterización y Modelamiento del Rango de Frecuencias Asignado a un Servicio Fijo- Móvil (698 - 960MHZ) de la Banda UHF del Espectro Electromagnético en la FIEC, Campus Prosperina

Abstract

The present research work is done in the area of the FIEC, located in the Campus Gustavo Galindo. The occupation of the electromagnetic spectrum was determined for all the assigned range (698-960 MHz) in the UHF band. With the antenna located in the roof of the building, and connected to the spectrum analyze, it was accomplished obtaining the measurements in one week, since Monday, December 29th of 2014, until Monday, January 5th of 2015. The obtained data show the signal power in the assigned range. After observations and an optimal analysis, it was decided dividing the range of frequencies and it was found that the fraction of the spectrum that has cellular service (824-894 MHz) is the only one that presents high levels and has changes on its power. It is also obtained an approximated 0% for percentage of use for frequencies below (698-824 MHz), and for higher frequencies (894-960 MHz), except for a small band of trunked services (932-937 MHZ) where the occupation percentage is minimal. The cellular service is divided in “Uplink” and “Downlink” band, the model for the first one was a derivation ok Markov’s model, where the probability of existing a high level of power is completely random, while for the second band, the probability of existing a high level of power is 100%.