Downlink OFDMA resource allocation under partial channel state information

Authors:
Stelios Stefanatos;Nikos Dimitriou
Affiliations:
Institute of Accelerating Systems & Applications, University of Athens, Athens, Greece;Institute of Accelerating Systems & Applications, University of Athens, Athens, Greece
Venue:
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Year:
2009

Citing 4
Cited 2

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Fundamentals of wireless communication
Rate-maximizing power allocation in OFDM based on partial channel knowledge

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Cross Layer Design of Downlink Multi-Antenna OFDMA Systems with Imperfect CSIT for Slow Fading Channels

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IEEE Transactions on Wireless Communications

Downlink mobile OFDMA resource allocation with minimum user rate requests

GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
An integrated cross-layer framework of adaptive FEedback REsource allocation and Prediction for OFDMA systems

Computer Networks: The International Journal of Computer and Telecommunications Networking

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Abstract

The problem of resource allocation (RA) in a down-link OFDMA system is examined under the realistic assumption of imperfect channel state information (CSI) at the base station. In this case, there is a nonzero outage probability that the assigned rate at a particular subcarrier/user pair will not be supported by the true channel realization, which may lead to a significant waste of the system's available resources. It is therefore necessary to obtain RA algorithms that take into account the effect of imperfect CSI. By exploiting the statistical description of the imperfect CSI, various algorithms are proposed that tradeoff complexity versus performance, aiming at maximizing the system's successfully transmitted rate.