Pilot-assisted IFO estimation schemes for DVB-T systems

This paper deals with the integer frequency offset (IFO) estimation for orthogonal frequency division multiplexing (OFDM)-based digital video broadcasting-terrestrial (DVB-T) systems. In the conventional scheme, the decision variable is based on the limited number of the correlations and ratios of pilots of the received samples, and thus, the decision variable contains only a small portion of the signal energy, resulting in performance degradation. In this paper, we propose two novel IFO estimation schemes combining the correlations and ratios of pilots of the received samples efficiently. Numerical results demonstrate that the proposed schemes provide a better performance compared with that of the conventional scheme in terms of the correct estimation probability.