A Novel Simulation Model for Coded OFDM in Doppler Scenarios: DVB-T Versus DAB

This paper develops a novel simulation model to characterize the bit error rate (BER) performance of coded orthogonal frequency-division modulation (OFDM) systems affected by Doppler spread. This simulation model, which acts directly in the frequency domain, greatly enhances the simulation efficiency, while maintaining a very good accuracy. By this model, the BER of two of the most popular wireless broadcasting standards, digital audio broadcasting (DAB) and terrestrial digital video broadcasting (DVB-T), has been assessed in Rayleigh and Rice channels. Simulation results show that the delay spread of the channel heavily affects the performance of DVB-T, while DAB is less sensitive to the frequency-selectivity of the channel. Moreover, DVB-T yields better performance than DAB in typical Rayleigh channels, whereas in Rice channels, for high signal-to-noise ratio (SNR), DAB outperforms DVB-T.