Análisis comparativo del estándar ATSC avanzado bajo modulaciones 8-VSB y OFDM.

Abstract

The NTSC (National Television System Committee) analogue television systems have to be replaced by more robust systems that allow the transmission of high quality content in the shortest time possible, this has led to the development of different standards for digital terrestrial television (DTT). The dispersion phenomena of the transmitted signal such is the case of rain affect the 8-VSB modulation, a possible solution path is to use OFDM (orthogonal frequency division multiplexing) which is a more robust modulation to interference and noise This Project focuses on the implementation of the 8-VSB (Vestigial Lateral Band) and OFDM modulation applied to the advanced digital television (ATSC) standard (Advanced Television Systems Committee). The implementation of the different block diagrams through the Matlab software allowed to observe the delay, the bit error rate (BER) and the result in the reception when transmitting data through an AWGN channel, in which variations were made on the relationship signal to noise (SNR) to show which of the modulations is the most efficient. With the obtained results it is shown that the ATSC standard with 8-VSB modulation is more efficient and with a BER higher than OFDM, but it has a greater delay in the reception of data.