Fast time-varying channel estimation method for LTE SC-FDMA systems

In this paper, a fast time-varying channel estimation method for Single Carrier Frequency division Multiple Access (SC-FDMA) communications on the Long Term Evolution (LTE) uplink is proposed. In uplink SC-FDMA, fast variations of the channel result in inter-carrier interference (ICI) which cannot be estimated properly with conventional estimation method. The proposed estimation method is performed all in the frequency domain and only part of channel frequency response for each uplink user is needed to estimate. The time variations of the frequency domain transmission function are modeled by the Basis expansion model (BEM). Simulation results demonstrate the performance and effectiveness of the proposed method over fast time-varying channels.