Resource Allocation in MIMO-OFDMA Wireless Systems Based on Linearly Precoded Orthogonal Space-Time Block Codes

Authors:
Borja Dañobeitia;Guillem Femenias;Felip Riera-Palou
Affiliations:
Mobile Communications Group, University of the Balearic Islands, Palma (Illes Balears), Spain 07122;Mobile Communications Group, University of the Balearic Islands, Palma (Illes Balears), Spain 07122;Mobile Communications Group, University of the Balearic Islands, Palma (Illes Balears), Spain 07122
Venue:
EUNICE '09 Proceedings of the 15th Open European Summer School and IFIP TC6.6 Workshop on The Internet of the Future
Year:
2009

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Abstract

This paper proposes and analyzes efficient rate and power allocation algorithms for MIMO-OFDMA broadcast channels based on linearly precoded orthogonal space-time block codes. The weighted sum-rate maximization problem is considered for both continuous and discrete rate allocation schemes. Since this problem is non-convex and combinatorial in nature, the Lagrange dual decomposition method is used to find an accurate near-optimal solution. The effects of using different MIMO configurations and realistic channel models with space and frequency correlation over the weighted sum-rate of the system is considered.