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

Abstract:

Digital Terrestrial Television (DTT) is focused on re-placing analog television transmissions, using OFDM (orthogonal frequency division multiplexing) modula-tion, which enables transmitting to both fixed and mobile equipment. Nevertheless, in the case of mobile digital television receivers, such as smartphones, laptops and other devices there are reception problems due to the multipath effect. In this project, the OFDM and CC-OFDM (Orthogonal Frequency Division Multiplexing by Convolution Coding) modulation schemes are simulated for the ISDB-T (Integrated Services Digital Television Broadcasting) standard. By means of the Simulink graphical programming environment, from Matlab, the block diagrams of both schemes were implemented and the data transmission was sim-ulated, further measuring the BER (Bit Error Rate), the delay and the number of carriers, for three types of channels, namely: AWGN (Additive White Gaus-sian Noise), Type A land (rural land) and Type C land (urban land). The results obtained indicate that CC-OFDM modulation has a higher efficiency, due to higher BER and reduction in the reception delay.