Channel Training & Estimation for Reconfigurable Intelligent Surfaces: Exposition of Principles, Approaches, and Open Problems

Reconfigurable intelligent surfaces (RIS) Waxing Kits are passive controllable arrays of small reflectors that direct electromagnetic energy towards or away from the target nodes, thereby allowing better management of signals and interference in a wireless network.The RIS has the potential for significantly improving the performance of wireless net

read more

Superconductor spintronics: modeling spin and charge accumulation in out-of-equilibrium NIS junctions subjected to Zeeman magnetic fields

We study the spin and charge accumulation in a superconductor when a normal-superconductor tunnel junction is subjected Covers to a Zeeman magnetic field and taken out of equilibrium by applying either a DC or AC voltage bias.We focus on a configuration which allows one to measure non-locally the spin-accumulation using a second ferromagnetic elect

read more