Analysis and comparation of ISDB-T using modulations OFDM and CC-OFDCM

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Abstract

Digital Terrestrial Television (DTT) is focused on replacing analogue television transmissions, however, with the modulation used OFDM (orthogonal frequency division multiplexing), transmissions can be made for fixed equipment. However, in the case of digital television reception systems such as smartphones, laptops and other mobile devices have reception problems caused by the multipath effect. In this project, the OFDM and CC-OFDM modulations (Orthogonal Frequency Division Multiplexing by Convolution Coding) are implemented in software Simulink for the ISDB-T (Integrated Services Digital Television Broadcasting) standard. By means of Simulink de Matlab the respective block diagrams of their architectures were implemented to observe the results when transmitting data, measuring the BER (Bit Error Rate), the delay and the number of carriers, under three types of channels such as: AWGN (Additive White Gaussian Noise), Type A land (rural land) and Type C land (urban land) in order to observe which modulation presents the best efficiency. From the obtained results it is shown that CC-OFDM modulation has a higher efficiency, because it has a higher BER and reduction in the reception delay.
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