Estudio de propagación de sistemas de telefonía móvil en la banda 1900 Mhz (LTE) mediante mediciones de campo eléctrico para establecer una recomendación de un modelo de propagación existente.

Abstract

The objective of the present titration work was the study of propagation of systems of Mobile Telephony in the 1900 MHz band of LTE technology, through field measurements to establish a recommendation of an existing propagation model in the area center of Riobamba. It was based on the analysis of three more propagation models used in mobile services: COST-231 Hata, Walfisch-Bertoni and COST-231 Walfisch-Ikegami in order to establish strategic environments for the evaluation of these models, so selected two radio bases; the first RB1 located in the historic center belonging to an urban environment of high construction and the second RB2 located in a high area representing to an urban environment of medium construction. Electric field measurements were made with the Narda SRM-3006 team around the two radio bases having a total of 48 points of measurement whose locations were obtained with the Spectra Precision Mobile Mapper 50 equipment, likewise, a survey of information necessary for the models was carried out, such as heights of antennas, average heights of buildings, among others; with this information the calculation was made theoretical basic propagation losses to estimate the electric field value with each model using Matlab software. To evaluate the effectiveness of the models, a comparison of theoretical values with values measured by statistical test RMSE, where the COST-231 Walfisch-Ikegami model presented the lowest values in the analyzed zones. It was concluded that this model is the one that has the best approximation in the environments studied in the downtown area of the city, it is recommended to expand the measurement campaign to consider other types of environments including other propagation models that they consider more parameters of analysis.