Performance evaluation of channel estimation based on adaptive filters and adaptive guard interval for mobile WiMAX

In this paper, the channel estimation algorithms are studied for mobile WiMAX standard. The comb-pilot type is used for channel estimation algorithms. We constructed an channel estimation algorithm based on two adaptive filters: Kalman and extended Kalman. Then we combined them with adaptive GI (guard interval) optimization algorithm. A performance analysis showed that depending on complex or simple computation, we can choose EKF (Extended Kalman Filter) estimator or adaptive GI with Kalman estimator.