Sistema digital de transmisión sonora para radiodifusión Fm utilizando hardware libre en la Carrera de Telecomunicaciones de la Universidad Técnica de Ambato

Abstract

This project proposes the design and implementation of a digital FM broadcasting system using software-defined radio (SDR) platforms, with the aim of strengthening practical training in the Telecommunications field. Because adopting SDR technology with digital systems is very costly and complex, a functional prototype is proposed that uses open-source hardware and tools, allowing its replication in low-resource educational environments. The project consists of integrating functional blocks that simulate the behavior of a digital transmitter, using platforms such as GNU Radio and USRP-type SDR devices. Furthermore, the prototype is validated through transmission and reception tests, evaluating technical parameters such as audio quality, spectrum, and link stability. As a result, a digital system was developed using DvSwitch, in which a Raspberry Pi was configured to function as a server, given its relatively low cost, to perform the necessary configurations. Additionally, FM audio communication was successfully established using GNU Radio and USRP, verifying the spectrum and link stability.