Localização de Jammers em redes móveis 5G.

Abstract

This work addresses the challenge of jammers, electronic devices designed to disrupt radio fre quency signals, with applications ranging from blocking signals in government security areas to malicious purposes aimed at compromising communications in 5G networks. The research focuses on evaluating methods for locating these devices, using technologies present in 5G. We explore the types of jammers and the attacks that can be carried out, outlining the steps for locating a passive radio frequency source. We discuss location estimation techniques based on time, signal strength, and angle of arrival, as well as location methods employed in 5G networks. Furthermore, we examine the state of the art in the localization of jammer devices, identifying advances and gaps in the literature. The methodology involves planning and executing exper iments with a jammer seized by Anatel, whose signal is captured and processed to estimate its location. As a result, using the time difference of arrival technique, estimated by using the cross-correlation of the received signals filtered with Daubechie wavelets, and applying the least squares method, a highly accurate location of the jammer was obtained, with the mean square error observed being 0.14 meters.