Análise de desempenho da transmissão de TV digital em ambientes com desvanecimento.

Abstract

Televisions are devices that entertains entire families around the world. In Brazil, this culture is not so different, but a new television system has been replacing the old analog TV system. Digital TV promises to deliver considerable improvements for the consumer such as better image quality, signal compression and absence of interference. It is then necessary to verify how this system will behave in unfavorable environments. This document presents an assessment of the Digital TV transmission in fading environments. In order to do so, equipment that emulate a TV channel in the Brazilian standard were used, in which it was possible to put components of delay and speed variations to verify the Doppler effect. The evaluation of the transmission is then made from the constellation generated, as well as in the analysis of the MER obtained for different values of the signal-to-noise ratio in the two proposed modulations.