Virtual DPD Neural Network Predistortion for OFDM-based MU-Massive MIMO

Chance Tarver, Alexios Balalsoukas-Slimining,Christoph Studer,Joseph R. Cavallaro

2021 55th Asilomar Conference on Signals, Systems, and Computers（2021）

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摘要

The nonlinearities of power amplifiers in massive MIMO arrays introduce unwanted spectral regrowth, which is typically avoided via digital predistortion at each amplifier. However, as the number of base station antennas scales up, so does the computational burden of per-antenna linearization. This work introduces a neural-network virtual digital predistortion (vDPD) scheme that operates before the...

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关键词

Training,Computers,Precoding,Neural networks,Massive MIMO,Predistortion,OFDM modulation

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