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Efficient Precoding for Massive MIMO Downlink under PA Nonlinearities

Abstract : This letter investigates the compensation of the power amplifier (PA) nonlinear distortion (NLD) in large-scale multiuser (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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https://hal.archives-ouvertes.fr/hal-02447523
Contributor : Rafik Zayani <>
Submitted on : Monday, May 3, 2021 - 3:58:49 PM
Last modification on : Thursday, May 6, 2021 - 12:50:49 PM
Long-term archiving on: : Wednesday, August 4, 2021 - 7:36:09 PM

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Rafik Zayani, Hmaied Shaïek, Daniel Roviras. Efficient Precoding for Massive MIMO Downlink under PA Nonlinearities. IEEE Communications Letters, Institute of Electrical and Electronics Engineers, 2019, 23 (9), ⟨10.1109/LCOMM.2019.2924001⟩. ⟨hal-02447523v1⟩

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