A Novel iterative Channel Estimation Algorithm for OFDM Systems

摘要

In order to improve the performance of traditional pilot aided signal modulation Orthogonal Frequency-Division Multiplexing (OFDM) channel estimation, a novel iterative method based on Expectation Maximum has been deduced. In the deduced process, the 16QAM is considered. Moreover a modified DFP algorithm is proposed to accelerate the EM algorithm and lower its complexity, the proposed algorithm is quadratic convergent too. The simulation results show that the proposed iterative speed algorithm has improved performance than traditional channel estimation in the fast fading channel environment.