Implementación de un sistema de transmisiones para Televisión Digital Terrestre en el Ecuador a través de módulos USRP.

Abstract

The implementation of a System to Broadcast Digital Terrestrial Televisión in Ecuador aims to establish a precedent that encourages the use of reprogramable radios to design communications systems, it was developed at Laboraratories Building of Computer Science and Electronics Faculty, ESPOCH. It uses the GNU Radio Companion Software on a computer. They are design systems scenarios in two main environments such as: Differential Quadrature Phase Shift Keying (DQPSK) Modulated and Quadrature Phase Shift Keying (QPSK); and System behavior in time and frequency to make a direct wired connection and a connection using logarithmic antennas at the terminals of the first channel of the Universal Software Radio Peripheral (USRP) is analyzed. When the tests were conducted a rate bit error of 2%, and a bandwidth of 600 kHz were obtained. In addition it was found that the quality of audio and video were good. Finally it is found that the set GNU Radio Companion software and USRP hardware can be used for the development of digital televisión in real time. It is recommended that the polytechnic community should continue research on the use of reprogramable radios, since these teams are very flexible when implementing existing communications systems. Implementation done must remain improved to ensure that they can be used in public television stations.