Multistep Linear Predictor for Slow Fading Channel

Abstract

Most of the channel estimation methods for OFDM transmission symbols have been developed under the assumption of a slowly fading channel, where the channel impulse response (CIR) is assumed to be stationary within an OFDM block. Such assumption may not always be true. In this paper, two cases are considered, i.e. when the channels are stationary within a block and time-varying within a block. The equalisation is done in time-domain with reduced computational complexity and with reduced time averaging. The RChol algorithm is used to solve the least squares equation. The simulation results show that the proposed algorithm has better performance compared to other previously proposed methods with reduced time averaging.