Robust channel estimation scheme for the TDS-OFDM based digital television terrestrial broadcasting system

摘要

As an effective technique for combating multipath fading and for high-bit-rate transmission over wireless channels, orthogonal frequency division multiplexing (OFDM) is extensively used in modern digital television terrestrial broadcasting (DTTB) systems to support high performance bandwidth-efficient multimedia services. In practical DTTB system, there always exists phase noise caused by the fluctuation of the receiver and transmitter oscillators. Therefore, we should consider the effects of phase noise when designing the channel estimation scheme for the DTTB system. In this paper, we propose a robust channel estimation scheme for the time domain synchronous OFDM (TDS-OFDM) based DTTB system with phase noise. The system performance studies under different channel situation are used to verify the efficiency of the proposed scheme.