An efficient iterative frequency domain equalization for ATSC DTV receiver

In this paper, we present an efficient single carrier frequency domain equalization for Advanced Television Systems Committee (ATSC) digital television receiver. The proposed scheme employs iterative cyclic prefix reconstruction (CPR) combined with block-overlapping process to reduce inter-carrier interference (ICI) component caused by the absence of cyclic prefix in multipath fading channel. In addition, trellis decoder aided iterative decision feedback frequency domain equalizer is derived to further mitigate inter-symbol interference (ISI). Finally, low-complex iterative frequency domain channel estimation is proposed to predict and track the time-varying multipath fading channel coefficients. The computer simulation results reveal that the proposed scheme has a significant performance improvement in multipath fading channel with respect to the previous time domain equalization (TDE) and frequency domain equalization (FDE).