Receiver Design for Mobile OFDM with Application to DVB-H

In mobile reception, orthogonal frequency division multiplexing (OFDM) may experience significant inter-carrier interference (ICI) which introduces an error floor proportional to the normalized Doppler frequency. To mitigate the effect of ICI, many schemes have been proposed but they are computationally complex for systems using large OFDM symbol length such as digital video broadcasting system for handheld (DVB-H). In this paper, we propose a low-complexity ICI suppression and channel estimation scheme for DVB-H systems. The proposed scheme is applied to a typical DVB-H system. Simulation results demonstrate that the proposed scheme is robust to mobility and can be employed efficiently in a DVB-H system. Comparison of DVB-H system with OFDM modulation and single carrier modulation (SC) employing frequency domain equalization (FDE) is investigated. Simulation results show the superiority of the SC to OFDM modulation for DVB-H systems and for the simulated scenarios.