A Novel Channel Estimation in T-DMB Receivers

This paper proposes noise reduction methods to improve the channel estimation performance in terrestrial-digital multimedia broadcasting (T-DMB) receivers. In the T-DMB, the channel estimation is performed by the pilot signal extraction and the channel coefficient estimation. Since the performance of the channel estimation highly depends on the estimated channel coefficients whose accuracy is associated with the received signal-to-noise ratio (SNR), it is important to reduce noise existing at the estimated channel coefficients. To reduce such noise components, various noise reduction methods of the estimated channel coefficients based on the Ad-point weighted moving average are proposed. Computer simulations show that the proposed methods improve the estimation performance by more than 2 to 3 dB in terms of the symbol error rate after equalization.