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- W2104580443 abstract "We present a user-scheduling scheme for multiuser multiple-input-multiple-output (MIMO) systems with random unitary beamforming (RUB) in this paper. The new scheme, which is termed as adaptive beam activation based on the conditional best beam index feedback (ABA-CBBI), requires low average feedback load by imposing a feedback threshold on the users' signal-to-interference-plus-noise ratio (SINR) and suffers less multiuser interference by only activating those beams requested by at least one user. We derive the exact analytical expression for the sum-rate capacity of the resulting multiuser MIMO systems, based on which we examine the optimal selection of the feedback threshold in terms of sum-rate maximization. We demonstrate through selected numerical examples that the proposed ABA-CBBI scheme with optimal thresholds can achieve better sum-rate performance than existing schemes over high-signal-to-noise-ratio (SNR) regions." @default.
- W2104580443 created "2016-06-24" @default.
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- W2104580443 date "2009-11-01" @default.
- W2104580443 modified "2023-09-23" @default.
- W2104580443 title "A Simple and Efficient User-Scheduling Strategy for RUB-Based Multiuser MIMO Systems and Its Sum-Rate Analysis" @default.
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- W2104580443 doi "https://doi.org/10.1109/tvt.2009.2025703" @default.
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