A Combined Algorithm of Kalman Estimator and Guard Interval Optimization for Mobile WiMAX

Quang Nguyen-Duc, Lien Pham-Hong, Thang Nguyen-Manh and Tra Luu-Thanh
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Quang Nguyen-Duc: Ho Chi Minh City University of Technology, Ho Chi Minh City, Vietnam
Lien Pham-Hong: Ho Chi Minh City University of Technical Education, Ho Chi Minh City, Vietnam
Thang Nguyen-Manh: Ho Chi Minh City University of Technology, Ho Chi Minh City, Vietnam
Tra Luu-Thanh: Ho Chi Minh City University of Technology, Ho Chi Minh City, Vietnam

International Journal of Distributed Systems and Technologies (IJDST), 2013, vol. 4, issue 1, 16-28

Abstract: Mobile WiMAX (Worldwide Interoperability for Microwave Access) system has been recently applied widely in wireless communication systems. In this paper, the channel estimation algorithms were studied for the mobile WiMAX system. The comb-type pilot was used for channel estimation algorithms. The authors proposed an adaptive algorithm of channel estimation based on Kalman filter which had good performance in fading channels. Then, based on the result of channel estimation, we proposed an advanced algorithm of GI (Guard Interval) optimization. The results showed that the Kalman estimator combined with GI optimization algorithm showed the best performance in this paper. This algorithm was verified by computer simulation.

Date: 2013
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