Wiener Filter for Basis Expansion Model Based Channel Estimation

This paper combines basis expansion model (BEM) based channel estimation with Wiener filter to deal with channel estimation in various mobile environments, especially in high-speed cases. The expression of Wiener filter for BEM based channel estimation (WF-BEM) is derived and the result explicitly considers the effect of intercarrier interference (ICI). The simulation results show that WF-BEM is better than Wiener filter for least squares (LS) based channel estimation in time-varying channels.