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    Space-time power scheduling of MIMO links? fairness and QoS considerations

    117548_space-time%20power%20PID%20117548.pdf (470.4Kb)
    Access Status
    Open access
    Authors
    Rong, Yue
    Hua, Y.
    Date
    2008
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Rong, Yue and Hua, Yingbo. 2008. Space-time power scheduling of MIMO links? fairness and QoS considerations. IEEE Journal of Selected Topics in Signal Processing. 2 (2): pp. 171-180.
    Source Title
    IEEE Journal of Selected Topics in Signal Processing
    DOI
    10.1109/JSTSP.2008.920667
    ISSN
    19324553
    Faculty
    School of Electrical Engineering and Computing
    Department of Electrical and Computer Engineering
    Faculty of Science and Engineering
    Remarks

    Copyright © 2008 IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.

    URI
    http://hdl.handle.net/20.500.11937/33155
    Collection
    • Curtin Research Publications
    Abstract

    Power control, beamforming and link scheduling are all important operations to improve the power-and-spectral efficiency of networks of multiple-input multiple-output (MIMO) wireless links. We call a joint optimization of the above operations the space-time power scheduling (STPS) scheme. The STPS scheme is formulated as joint optimization of the transmitter covariance matrices of all active MIMO links over all dimensions of space and time, which includes the dimension of frequency as a dual form of time. In this paper, we address the proportional fair (PF) and quality-of-service (QoS) issues of the STPS scheme, which are important for networks with asymmetric topology and/or asymmetric traffic demands. Both slow fading channels and fast fading channels are considered. We demonstrate that the PF-STPS scheme provides a very attractive tradeoff between sum capacity and rate distribution for asymmetric links. We also demonstrate that the QoS-STPS scheme has a much higher power-and-spectral efficiency than the previously existing QoS based scheme that do not exploit the temporal freedom. Efficient optimization algorithms for both PF-STPS and QoS-STPS are provided. The STPS scheme is a centralized cooperative scheme which requires a scheduler. For ad hoc networks, this scheduler can be elected adaptively among eligible nodes in the network.

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