OFDM system channel estimation using time-domain training sequence for mobile reception of digital terrestrial broadcasting

In this paper, a channel estimation technique using time-domain training sequence is investigated. It is demonstrated that this technique can estimate the channel status more accurately, under low C/N situations, than the conventional frequency domain technique using in-band pilots 1, 2. A novel channel estimation and compensation scheme for fast fading channel is developed for OFDM system using time domain training sequence. It is compared with the frequency domain pilot channel estimation scheme.