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EURASIP Journal on Wireless Communications and Networking
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Optimal Multiuser Zero Forcing with Per-Antenna Power Constraints for Network MIMO Coordination

EURASIP Journal on Wireless Communications and Networking volume 2011, Article number: 190461 (2011) Cite this article

Abstract

We consider a multicell multiple-input multiple-output (MIMO) coordinated downlink transmission, also known as network MIMO, under per-antenna power constraints. We investigate a simple multiuser zero-forcing (ZF) linear precoding technique known as block diagonalization (BD) for network MIMO. The optimal form of BD with per-antenna power constraints is proposed. It involves a novel approach of optimizing the precoding matrices over the entire null space of other users' transmissions. An iterative gradient descent method is derived by solving the dual of the throughput maximization problem, which finds the optimal precoding matrices globally and efficiently. The comprehensive simulations illustrate several network MIMO coordination advantages when the optimal BD scheme is used. Its achievable throughput is compared with the capacity region obtained through the recently established duality concept under per-antenna power constraints.

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  1. Electrical & Computer Engineeering, University of Alberta, and TRLabs, Edmonton, AB, Canada, T6G 2V4

    Saeed Kaviani & Witold A. Krzymień

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  1. Saeed Kaviani
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  2. Witold A. Krzymień
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Correspondence to Witold A. Krzymień.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kaviani, S., Krzymień, W.A. Optimal Multiuser Zero Forcing with Per-Antenna Power Constraints for Network MIMO Coordination. J Wireless Com Network 2011, 190461 (2011). https://doi.org/10.1155/2011/190461

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  • DOI: https://doi.org/10.1155/2011/190461

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