Reconfigurable Intelligent Surfaces for Energy Efficiency in Wireless Communication [PDF]
IEEE Transactions on Wireless Communications, 2018 The adoption of a reconfigurable intelligent surface (RIS) for downlink multi-user communication from a multi-antenna base station is investigated in this paper.
Chongwen Huang +4 more
semanticscholar +1 more source
Wireless energy harvesting for autonomous reconfigurable intelligent surfaces [PDF]
, 2023 In the current contribution, we examine the feasibility of fully-energy-autonomous operation of reconfigurable intelligent surfaces (RIS) through wireless energy harvesting (EH) from incident information signals.
Martins, Wallace Alves +24 more
core +1 more source
Design and Evaluation of Reconfigurable Intelligent Surfaces in Real-World Environment [PDF]
IEEE Open Journal of the Communications Society, 2021 Reconfigurable intelligent surfaces (RISs) have promising coverage and data-rate gains for wireless communication systems in 5G and beyond. Prior work has mainly focused on analyzing the performance of these surfaces using simulations or lab-level ...
G. Trichopoulos +9 more
semanticscholar +1 more source
A Primer on Near-Field Beamforming for Arrays and Reconfigurable Intelligent Surfaces [PDF]
Asilomar Conference on Signals, Systems and Computers, 2021 Wireless communication systems have almost exclusively operated in the far-field of antennas and antenna arrays, which is conventionally characterized by having propagation distances beyond the Fraunhofer distance.
Emil Björnson +2 more
semanticscholar +1 more source
Reconfigurable Intelligent Surfaces in Challenging Environments: Underwater, Underground, Industrial and Disaster [PDF]
, 2021 Challenging environments comprise a range of scenarios, which share the fact that it is extremely difficult to establish a communication link using conventional technology due to many impairments typically associated with the propagation medium and ...
Kisseleff, Steven +3 more
core +1 more source
Modeling and Architecture Design of Reconfigurable Intelligent Surfaces Using Scattering Parameter Network Analysis [PDF]
IEEE Transactions on Wireless Communications, 2020 Reconfigurable intelligent surfaces (RISs) are an emerging technology for future wireless communication. The vast majority of recent research on RIS has focused on system level optimizations.
Shanpu Shen, B. Clerckx, R. Murch
semanticscholar +1 more source
Rayleigh Fading Modeling and Channel Hardening for Reconfigurable Intelligent Surfaces [PDF]
IEEE Wireless Communications Letters, 2020 A realistic performance assessment of any wireless technology requires the use of a channel model that reflects its main characteristics. The independent and identically distributed Rayleigh fading channel model has been (and still is) the basis of most ...
Emil Björnson, L. Sanguinetti
semanticscholar +1 more source
Closed-Form Global Optimization of Beyond Diagonal Reconfigurable Intelligent Surfaces [PDF]
IEEE Transactions on Wireless Communications, 2022 Reconfigurable intelligent surfaces (RISs) allow controlling the propagation environment in wireless networks by tuning multiple reflecting elements.
Matteo Nerini, Shanpu Shen, B. Clerckx
semanticscholar +1 more source
IEEE Journal on Selected Areas in Communications, 2020 Reconfigurable intelligent surfaces (RISs) are an emerging transmission technology for application to wireless communications. RISs can be realized in different ways, which include (i) large arrays of inexpensive antennas that are usually spaced half of ...
M. di Renzo +6 more
semanticscholar +1 more source
Reconfigurable Intelligent Surfaces: A signal processing perspective with wireless applications [PDF]
IEEE Signal Processing Magazine, 2021 Antenna array technology enables the directional transmission and reception of wireless signals for communication, localization, and sensing purposes. The signal processing algorithms that underpin it began to be developed several decades ago [1], but it
Emil Björnson +5 more
semanticscholar +1 more source