Salh, Adeeb, Lukman Audah, Nor Shahida Mohd Shah, and Shipun Anuar Hamzah. 2018. “Joint Transmit Antennas for Energy Efficiency in Downlink Massive MIMO Systems”. International Journal of Integrated Engineering 10 (3). https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/2127.