Hongzhi Lin

Novel time-domain windowing channel estimation for OFDM in mobile system

A modified time-frequency transform algorithm is developed in this paper, the continuous pilot signal in time domain is transformed into time domain, through peak-detection processing, the possible peaks relative to multipath components are found and a proper window function is adopted to localize the peaks and minimize the noisy impact of non-peak area, the filtered pilot signal is then interpolated and transformed back to frequency domain. This simple but effective algorithm kicks out the additive noise and approaches the real channel response without additive noise more closely, improving the SNR of received signal after the deconvolution based on the channel estimation. The simulation results adopting this algorithm show the expected improvement of SNR of received signal.