Resource allocation for ofdm systems in the presence of time-varying channels

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Conference Proceeding

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Adaptive resource allocation schemes for OFDM systems designed assuming static channels are known to experience significant performance loss when the channel is time-varying. The inaccuracy in channel state information (CSI) due to outdated channel estimates has been recognized as the main reason for this problem. To mitigate this effect, we present robust bit and power allocation schemes based on the predicted channel state information. Simulation results show that channel prediction schemes can significantly improve the performance of resource allocation algorithms over time-varying channels.

Publication Source (Journal or Book title)

WINSYS 2007 - International Conference on Wireless Information Networks and Systems, Proceedings

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