Desenvolvimento de um protótipo de um analisador espectral de sinal PLC utilizando o módulo USRP, o software GNU Radio e o protótipo da interface PLC-USRP

Abstract

This work aims to develop a prototype that makes the acquisition and analysis of Powerline Communication (PLC) network signals, using the hardware module USRP, the GNU Radio software and a prototype of a PLC-USRP interface specially developed in order to allow the signals acquisition. The development of this project relies on the fact that there is no similar tool on the market, which allows the PLC signals acquisition and analysis. Another issue is the usage of low-cost solutions like the USRP module and the GNU Radio software, that together implement the Software Defined Radio (SDR)concept. For the implementation of the physical USRP interface with the PLC network and to adjust the signals to be suitable to be handled by the USRP module a PLCUSRP interface prototype was designed. Aiming to experimentally validate the correct performance of this interface a low-cost software prototype was designed, also based on the SDR concept to make the acquisition of the frequency response amplitude of an electrical circuit. The effectiveness of the PLC signal spectral analyzer prototype was demonstrated through the acquisition of a PLC spectrum of a real transmitted signal.