14 papers
Temperature-aware Optimization of Liquid Crystal Reconfigurable Intelligent Surfaces: Physics-based Modeling and Robust Design
Mohamadreza Delbari, Bowu Wang, Arash Asadi +1
While LC technology facilitates the realization of energy-efficient and scalable RISs, their phase shift response is inherently temperature-dependent. Neglecting this thermal depen…
Fault-Aware Design for Reconfigurable Holographic Surface-Aided ISAC Systems
Lu Wang, Mohamadreza Delbari, Gui Zhou +3
Reconfigurable holographic surface (RHS)-aided integrated sensing and communication (ISAC) systems hold great promise for achieving both sensing and communication with low hardware…
Wideband Illumination with Liquid Crystal Reconfigurable Intelligent Surfaces: Modeling, Design, and Experimental Tests
Mohamadreza Delbari, Robin Neuder, Alejandro Jiménez-Sáez +2
Liquid crystal (LC) is a promising hardware solution for implementing large RISs, as it is cost-effective, energy efficient, scalable, and capable of providing continuous phase shi…
Flexible RISs: Learning-based Array Manifold Estimation and Phase-shift Optimization
Mohamadreza Delbari, Ehsan Mohammadi, Mostafa Darabi +3
Reconfigurable intelligent surfaces (RISs) are envisioned as a key enabler for next-generation wireless networks, offering programmable control over propagation environments. While…
Learning-Based Phase Shift Optimization of Liquid Crystal RIS in Dynamic mmWave Networks
Le Hao, Robin Neuder, Mohamadreza Delbari +4
To enhance coverage and signal quality in millimeter-wave (mmWave) frequencies, reconfigurable intelligent surfaces (RISs) have emerged as a game-changing solution to manipulate th…
Near-Field Multipath MIMO Channels: Modeling Reflectors and Exploiting NLOS Paths
Mohamadreza Delbari, George C. Alexandropoulos, Robert Schober +2
Near-field (NF) communications is receiving renewed interest in the context of multiple-input multiple-output (MIMO) systems involving large physical apertures with respect to the…