Nonlinear Power Amplifier-Resilient Cell-Free Massive MIMO: A Joint Optimization Approach
Information Theory
2025-12-09 v2 Signal Processing
math.IT
Abstract
This letter analyzes the effects of power amplifiers (PAs) on the downlink of cell-free massive MIMO systems. We model signal transmission incorporating nonlinear PA distortion and derive a unified spectral efficiency (SE) expression applicable to arbitrary precoding schemes. To combat PA-induced performance degradation, a joint optimization approach for user association and max-min power control is proposed. Furthermore, a low-complexity alternative is developed to approximate the joint optimization with reduced computational overhead. Simulations validate the analysis and demonstrate significant performance gains of the proposed approaches over conventional techniques.
Cite
@article{arxiv.2506.22094,
title = {Nonlinear Power Amplifier-Resilient Cell-Free Massive MIMO: A Joint Optimization Approach},
author = {Wei Jiang and Hans D. Schotten},
journal= {arXiv preprint arXiv:2506.22094},
year = {2025}
}