Table of Contents
International Journal of Vehicular Technology
Volume 2013, Article ID 472154, 8 pages
http://dx.doi.org/10.1155/2013/472154
Research Article

Multiple-Observation-Based Robust Channel and Doppler Estimation in High Mobility Applications

1Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, Canada V6T 1Z4
2Department of Electrical and Computer Engineering, McGill University, Montreal, Canada H3A 0E9

Received 10 November 2012; Revised 11 April 2013; Accepted 12 April 2013

Academic Editor: Shinsuke Hara

Copyright © 2013 Md. Jahidur Rahman and Jiaxin Yang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Channel estimation is a challenging task, especially in high mobility applications due to the rapid variation of the propagation environment. This paper presents a new technique that exploits past channel impulse responses (CIRs) in order to trace and compensate Doppler frequency in mobile applications, enabling robust estimation of time-varying channel. Based on the fact that channel taps at different time instants can be fitted with a sinusoidal wave, a joint estimator is proposed to estimate the channel parameters. Therefore, the efficiency of the channel estimation can be improved and stringent delay requirements for the communication systems can also be satisfied. Simulation results show that system performance in terms of bit error rate (BER) is significantly improved with the proposed algorithm.