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The user selection method based on chordal distance is widely used in multiuser multiple-input multiple-output (MU-MIMO) systems with block diagonalisation. It has throughput close to the capacity based method with low complexity. In this Letter, a user selection method with higher throughput and much lower complexity is proposed. To investigate the performance in a more practical channel scenario, 3D MIMO channels are used in simulations. Compared with existing user selection algorithms, the proposed method achieves good throughput performance and the lowest complexity order.
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http://iet.metastore.ingenta.com/content/journals/10.1049/el.2018.5352
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content/journals/10.1049/el.2018.5352
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Low-complexity user selection method in 3D MU-MIMO systems