A graph-based resource allocation algorithm for downlink MIMO-OFDMA networks

Authors:
Ahmed N. Zaki;Abraham O. Fapojuwo
Affiliations:
The University of Calgary, Calgary, AB, Canada;The University of Calgary, Calgary, AB, Canada
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

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Abstract

In this paper, we develop an efficient resource allocation algorithm for Multiple-Input Multiple-Output Orthogonal Frequency Division Multiple Access (MIMO-OFDMA) networks that considers all OFDM symbols in the current frame. By recognizing the special structure of the optimization problem, we develop an efficient algorithm based on graph theory that has a complexity independent of the number of OFDM symbols. System simulations show that the proposed algorithm enhances the system throughput and the user's data rate.