Wireless Energy Harvesting For Autonomous Reconfigurable Intelligent Surfaces

in IEEE Transactions on Green Communications and Networking (in press)

Maximizing the Number of Served Users in a Smart City using Reconfigurable Intelligent Surfaces

in Proceedings of IEEE Wireless Communications and Networking Conference (WCNC) (2022, April 10)

Double-RIS Communication with DF Relaying for Coverage Extension: Is One Relay Enough?

in IEEE International Conference on Communications, Seoul, May 2022 (2022)

Time vs. Unit Cell Splitting for Autonomous Reconfigurable Intelligent Surfaces

Scientific Conference (2022)

Joint Spatial Division and Multiplexing for FDD in Intelligent Reflecting Surface-assisted Massive MIMO Systems

in IEEE Transactions on Vehicular Technology (2022)

Reconfigurable Intelligent Surface Optimal Placement in Millimeter-Wave Networks

in IEEE Open Journal of the Communications Society (2021), 2

This work discusses the optimal reconfigurable intelligent surface placement in highly-directional millimeter wave links. In particular, we present a novel system model that takes into account the ... [more ▼]

This work discusses the optimal reconfigurable intelligent surface placement in highly-directional millimeter wave links. In particular, we present a novel system model that takes into account the relationship between the transmission beam footprint at the RIS plane and the RIS size. Subsequently, based on the model we derive the end-to-end expression of the received signal power and, furthermore, provide approximate closed-form expressions in the case that the RIS size is either much smaller or at least equal to the transmission beam footprint. Moreover, building upon the expressions, we derive the optimal RIS placement that maximizes the end-to-end signal-to-noise ratio. Finally, we substantiate the analytical findings by means of simulations, which reveal important trends regarding the optimal RIS placement according to the system parameters. [less ▲]