[HTML][HTML] Energy efficiency techniques in ultra-dense wireless heterogeneous networks: An overview and outlook

O Alamu, A Gbenga-Ilori, M Adelabu, A Imoize… - … Science and Technology …, 2020 - Elsevier
In wireless heterogeneous networks (HetNets), the spatial densification through small cells
and the application of massive MIMO antenna arrays are key enablers for high data …