Optimal Joint Beamforming and Power Control in Cell-Free Massive MIMO Downlink

TL;DR

This paper introduces a new optimization model for joint beamforming and power control in cell-free massive MIMO downlink systems, aiming to minimize user interference while ensuring QoS and power limits.

Contribution

It proposes a tractable min-max optimization model for joint beamforming and power control in CFmMIMO, improving data rate and energy efficiency over existing methods.

Findings

Outperforms competing schemes in data rate

Reduces power consumption effectively

Enhances energy efficiency

Abstract

In this paper, a novel optimization model for joint beamforming and power control in the downlink (DL) of a cell-free massive MIMO (CFmMIMO) system is presented. The objective of the proposed optimization model is to minimize the maximum user interference while satisfying quality of service (QoS) constraints and power consumption limits. The proposed min-max optimization model is formulated as a mixed-integer nonlinear program, that is directly tractable. Numerical results show that the proposed joint beamforming and power control scheme is effective and outperforms competing schemes in terms of data rate, power consumption, and energy efficiency.