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On the Asymptotic Optimality of Opportunistic Norm-Based User Selection with Hard SINR Constraint

EURASIP Journal on Advances in Signal Processing volume 2009, Article number: 475273 (2009) Cite this article

Abstract

Recently, user selection algorithms in combination with linear precoding have been proposed that achieve the same scaling as the sum capacity of the MIMO broadcast channel. Robust opportunistic beamforming, which only requires partial channel state information for user selection, further reduces feedback requirements. In this work, we study the optimality of the opportunistic norm-based user selection system in conjunction with hard SINR requirements under max-min fair beamforming transmit power minimization. It is shown that opportunistic norm-based user selection is asymptotically optimal, as the number of transmit antennas goes to infinity when only two users are selected in high SNR regime. The asymptotic performance of opportunistic norm-based user selection is also studied when the number of users goes to infinity. When a limited number of transmit antennas and/or median range of users are available, only insignificant performance degradation is observed in simulations with an ideal channel model or based on measurement data.

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Authors and Affiliations

  1. Signal Processing Laboratory, ACCESS Linnaeus Center, Royal Institute of Technology (KTH), 10044, Stockholm, SE, Sweden

    Xi Zhang & Björn Ottersten

  2. Communications Laboratory, Faculty of Electrical Engineering and Information Technology, Dresden University of Technology, 01062, Dresden, Germany

    Eduard A. Jorswieck

  3. Information Systems Laboratory, Stanford University, CA, 94305, USA

    Arogyasvsami Paulraj

Authors
  1. Xi Zhang
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  2. Eduard A. Jorswieck
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  3. Björn Ottersten
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  4. Arogyasvsami Paulraj
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Corresponding author

Correspondence to Xi Zhang.

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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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Zhang, X., Jorswieck, E.A., Ottersten, B. et al. On the Asymptotic Optimality of Opportunistic Norm-Based User Selection with Hard SINR Constraint. EURASIP J. Adv. Signal Process. 2009, 475273 (2009). https://doi.org/10.1155/2009/475273

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  • DOI: https://doi.org/10.1155/2009/475273

Keywords

  • Channel State Information
  • Broadcast Channel
  • User Selection
  • Asymptotic Performance
  • Asymptotic Optimality