Análise de perda de percurso para sistemas multiportadoras na faixa de 700 MHz

Abstract

The ever-increasing demand for wireless broadband services requires higher reliability, better connectivity and higher signal range. Aiming at a more efficient occupation of the 700 MHz spectrum, formerly used by Digital TV, Brazil allocated this band to the deployment of multicarrier cellular systems. This frequency band presents the advantage of better signal propagation, providing higher coverage for each base station. In this sense, the present work aims to evaluate, compare and analyze empirical models of path loss, as well as propose a simple model based on artificial intelligence. By analyzing performance metrics, the coverage prediction models are evaluated in comparison with values obtained through a measurement campaign in the region of Pampulha’s Lagoon in Belo Horizonte. Results indicate that the traditional path loss models show significant improvement after offset correction, and that the model based on an artificial neural network presents a better fit to the measurement data.