一种基于改进DCT的DVB-T信道估计算法研究

In DVB-T system, channel estimation of the pilots are usually acquired by least squares (LS) , which contains the additive noise and estimation error caused by multipath. That directly determines the performance of channel estimation. In this paper, based on LS, firstly the transform of DCT is made, and then the processed data is set and added zeros through the multi-path recognition algorithm in the broad domain of multipath; then processed by filtering in the broad domain of Doppler to finish the entire estimation. Simulation shows that the channel estimation algorithm can track the variance of channel in both time and frequency domain and can achieve a good BER performance.