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Leakage-based user scheduling in MU-MIMO broadcast channel

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Abstract

This paper investigates user scheduling in multi-user MIMO broadcast channel. We propose a leakagebased user scheduling scheme, in which a user’s leakage power to other users is an important factor to determine whether the user should be selected. The accuracy of closed-form solution of SLNR (signal to leakage plus noise ratio) makes the proposed scheme outperform the traditional scheduling method based on SINR (signal to interference plus noise ratio). The proposed algorithms can work in case of perfect or limited feedback of CSI (channel state information) at transmitter, and the advantage is verified with numerical results. A tradeoff relation among feedback bits number, active user number and transmit/receive antennas number is analyzed, which serves as a system design guideline.

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Authors and Affiliations

  1. National Key Lab of Communication, University of Electronic Science and Technology of China, Chengdu, 611731, China

    Xin Xia, Gang Wu, Jing Liu & ShaoQian Li

Authors
  1. Xin Xia
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  2. Gang Wu
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  3. Jing Liu
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  4. ShaoQian Li
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Corresponding author

Correspondence to Xin Xia.

Additional information

Supported by the National Natural Science Foundation of China (Grant Nos. 60702073, 60602008, 60496313), the National Basic Research Program of China (Grant No. 2007CB310604), and the National Fundamental Research Program (Grant No. A1420080150)

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Xia, X., Wu, G., Liu, J. et al. Leakage-based user scheduling in MU-MIMO broadcast channel. Sci. China Ser. F-Inf. Sci. 52, 2259–2268 (2009). https://doi.org/10.1007/s11432-009-0214-6

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  • DOI: https://doi.org/10.1007/s11432-009-0214-6

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