“Enhancing Spectral Efficiency in Cell-Free Massive MIMO Systems Using K-Means++ Clustering and AP-UE Association”. International Research Journal on Advanced Engineering Hub (IRJAEH) 4, no. 01 (January 27, 2026): 361–367. Accessed February 22, 2026. https://irjaeh.com/index.php/journal/article/view/1276.