Power allocation is reformulated to include PA nonlinearity via Bussgang linearization, with a closed-form threshold separating noise-limited and distortion-limited regimes and projected gradient descent optimization yielding capacity gains in saturation.
P erformance limits of mimo systems with nonlinear power amplifiers,
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Power Amplifier-aware Power Allocation for Noise-limited and Distortion-limited Regimes
Power allocation is reformulated to include PA nonlinearity via Bussgang linearization, with a closed-form threshold separating noise-limited and distortion-limited regimes and projected gradient descent optimization yielding capacity gains in saturation.