Acheampong, Abednego, Nathaniel Martey, and Daniel Appiah Kumah. “A Comprehensive Study of Optimal Linear Pre-Coding Schemes for a Massive Mu-MIMO Downlink System; A Survey”. International Journal of Computer (IJC) 32, no. 1 (February 21, 2019): 21–33. Accessed October 3, 2025. https://www.ijcjournal.org/InternationalJournalOfComputer/article/view/1359.