Integrated Terrestrial and Non-Terrestrial Wireless Networks
Traditionally only terrestrial, wireless networks are now looking to the sky with the aim of integrating aerial units such as drones or satellites. The use of drones, specifically, carries enormous potential, but it poses major research challenges.

Near-Field MIMO Communication
Advanced releases of 5G, and eventually 6G, will operate at frequencies beyond 100 GHz. In conjunction with an ever shorter range, this opens up a new realm for MIMO communication that does not require multipath propagation: near-field MIMO.

MIMO Via Smart Surfaces
Smart surfaces, passive and consuming almost no energy, are made up of elements that can reradiate an impinging radio wave with a controllable phase shift. Their deployment will enable turning portions of the environment into a part of the system.