Determinación del campo eléctrico máximo utilizando un modelo matemático en las instalaciones de la ESPOCH.

Abstract

In the present thesis, the maximum weekly electric field of three frequency ranges belonging to the GSM 850 band (869 MHz - 870 MHz, 870 MHz - 880 MHz, and 890 MHz - 891.5 MHz) was determined using a mathematical model based on instantaneous measurements at any time of the day in the ESPOCH facilities. The process began with the NARDA SRM-3006 equipment configuration to perform measurements every 6 minutes, positioning the equipment's antenna at a height of 1.5 meters above the ground for four consecutive weeks (28 days). The median value signals with their respective standard deviation underwent prior moving average filtering to smooth the signal without losing its original shape. Subsequently, these discrete signals were converted into continuous time series using cubic spline methods. Next, the extrapolation factors of the electric field f_EE (t) and its standard deviation f_σE (t) were determined. Using these extrapolation factors and the determination of the instantaneous mean value E ̅(t), the equation to determine the maximum weekly electric field Emax was applied: E_max= E ̅(t) [f_EE (t)± f_σE (t)], based on an instantaneous measurement. Finally, a comparison was made between the results obtained in the research developed in the doctoral thesis of Infante from channel 133 (870.2 MHz) and the frequency range of 869 MHz - 870 MHz of the present thesis work, observing a difference in the last analysis period from 15:00 to 24:00. Additionally, it was observed that the curve of the weekly mean signal in this research decreases rapidly, while for the curve of the mean value signal developed by Infante, it decreases slowly. These changes are attributed to factors influenced by the post-pandemic scenario.