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On the impact of mobility on the channel estimation in WiMAX OFDMA-Uplink
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The demand for wireless broadband access systems supporting mobility of the individual users has dramatically increased in recent years. To this end, we analyze the impact of user-mobility in the uplink of an OFDMA system on the performance of pilot-aided channel estimation. We analyze the mean square error (MSE) performance of two pilot-aided channel estimation schemes, the simple Gauss-Markov estimator and the optimal LMMSE estimator. We derive closed-form expressions for the MSE taking into account the impact of intercarrier-interference and time-variations of the channel. Different pilot allocation strategies are analyzed and their performances are compared. Finally, the results are illustrated by numerical simulations based on the WiMAX 802.16e specifications.
@inproceedings{SJSHM06otio,
author = "Aydin Sezgin and Peter Jung and Malte Schellmann and Hardy Halbauer and Roland Muenzner",
title = "{On the impact of mobility on the channel estimation in WiMAX OFDMA-Uplink}",
booktitle = "{The 17th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC’06)}",
year = "2006",
note = "ftp://ftp.hhi.de/jungp/publications/Conferences/pimrc06/pimrc06.pdf",
}
Last modified 22.08.2006 10:48
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