Abdullah, Qazwan, and Nor Shahida Mohd Shah. “Downlink Massive MIMO Systems: Reduction of Pilot Contamination for Channel Estimation With Perfect Knowledge of Large-Scale Fading”. International Journal of Integrated Engineering 15, no. 3 (October 2, 2023): 227–239. Accessed May 19, 2024. https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/14571.