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Efficient Precoding for Massive MIMO Downlink Under PA Nonlinearities

Rafik Zayani 1 Hmaied Shaiek 1 Daniel Roviras 1
1 CEDRIC - LAETITIA - CEDRIC. Traitement du signal et architectures électroniques
CEDRIC - Centre d'études et de recherche en informatique et communications
Abstract : This letter investigates the compensation of the power amplifier (PA) nonlinear distortion (NLD) in large-scale multi-user (MU) multiple-input multiple-output (MIMO) downlink systems. We introduce a PA-aware precoding approach that exploits the high-dimensional degrees of freedom (DoFs), allowed by equipping the base station (BS) by a high number of antennas, and performs the precoded signals that when amplified and passed through the channel, guarantee excellent transmission quality. Specifically, we formulate the proposed PA-aware precoding approach as a simple convex optimization problem which enables efficient, low-complexity, and reliable algorithm implementations. The simulation results demonstrate the strong potential of the proposed approach in terms of improving the link quality and reducing the required computational complexity.
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Submitted on : Tuesday, April 27, 2021 - 11:39:05 AM
Last modification on : Thursday, May 6, 2021 - 12:50:49 PM

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Rafik Zayani, Hmaied Shaiek, Daniel Roviras. Efficient Precoding for Massive MIMO Downlink Under PA Nonlinearities. IEEE Communications Letters, Institute of Electrical and Electronics Engineers, 2019, 23 (9), pp.1611-1615. ⟨10.1109/LCOMM.2019.2924001⟩. ⟨hal-02447523v2⟩

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