Adaptive Residual Recurrent Neural Network with Heuristic Optimization for Spectral Energy Balancing in 6G Massive MIMO Systems. - Jafar A. Alzubi; Mohana Geetha Dhandapani; Asha Aiyappan; Sukumaran Damodaran; J. Shreyas; Thella Preethi Priyanka (Int. J. Comput. Intell. Syst., 2026)