Renzo, Debbah, Phan-Huy, Alouini, Yuen, Sciancalepore, Alexandropoulos, Hoydis, Gacanin, Rosny, Bounceu, Lerosey, Fink, 2019. Smart Radio Environments Empowered by AI Reconfigurable Meta-Surfaces:
  An Idea Whose Time Has Come.