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Gyre Precoding for MU-MIMO Systems
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DOI：10.1109/LCOMM.2021.3082808.png)
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Abstract
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This work introduces Gyre Precoding (GP), a novel linear multi-user multiple-input multiple-output (MU-MIMO) precoding approach. GP performs rotations of the symbols of each spatial layer to optimize the precoding performance. To find the rotation angles, we propose a nearoptimal, gradient descent-based low-complexity algorithm. GP is constellation-agnostic and does not require significant changes to conventional receiver procedures or wireless standards. Computer evaluation results show that GP can achieve 8 dB SNR gains over linear precoding techniques and 2 dB over suboptimal symbol-level precoding (SLP) methods for a 16 x 16 MU-MIMO system. Furthermore, in a 64 x 12 massive-MIMO scenario in a 5G New Radio (5GNR) setup, GP achieves a 13% higher throughput gain over zero-forcing precoding.
Keywords:
Multi-user multiple-input multiple-output (MU-MIMO)
precoding
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