Implementación de un sistema de transmisión de televisión digital basado en software usando SDR (radio definido por software), para el análisis de la factibilidad de la migración de televisión analógica a digital en Ecuador.

Abstract

The objective was to implement a digital televisión transmission system base on software, Using software defined radio (SDR), to analize the technical feasibility of migration fron Analog to Digital Television in Ecuador. Non-experimental reserach was developed with a qualitative approach. The implementation scenario was deployed within the infraestructure of the information and Communication Technologies Departament (DTIC) of a Higher School of Chimborazo (ESPOCH), where the transmitter is virtualized and the receiver is a computer, both computers contain system Linux-Fedora operating system in which the GNU Tadio tool was used to perform the signal processing to subsequently send the video signal to the medium through the output periperal of the USRP card. Transmission test with modulation and coding variations were carried out by applying the 2k transmission mode, then the signal degradation was analyzed using the subjective comparison method to determine the signal quality according to the combination of modulation and coding, where they were obtained that the parameters applied, with wich a better result was achieved were QPSK modulation with ½ coding. In addition, the software-based transmitter and the conventional transmitter were compared to define the technical and economic feasibility of the system implemented in the televisión migration In Ecuador, It is concluded that the implemented system is a viable alternative to apply to the migration to digital televisión. It is recommended to implement the system implemented in a university televisión channel to carry out diffusion tests.