Adaptive Hybrid Precoding Strategy for Cell-Free Massive MIMO

This work presents an adaptive hybrid signal precoding strategy for Cell-Free (CF) Massive multiple-input multiple-output (MIMO) systems. The proposed solution exploits the advantages of both distributed and centralized processing schemes to perform precoding. In our proposal, some access points (APs) are dynamically configured be used in a scheme, whereas others adjusted employ method. Simulation results show that it is possible achieve good compromise between spectral efficiency (SE) computational complexity (CC) CF MIMO systems finding sensible balance APs utilized To best knowledge, prior-art solutions have not addressed method itself, they only specific each architecture, i.e., or centralized.