3 papers
math.OC2026
A Mode-Matching Approach to the Design of RIS-Aided Communications
Ahmed Najjar, Hajar El Hassani, Marco Di Renzo +2
Reconfigurable intelligent surface (RIS) is an emerging technology for application to wireless communications. In this paper, we consider the problem of anomalous reflection and mo…
cs.IT2026
Sleep or Transmit: Dual-Mode Energy-Efficient Design for NOMA-Enabled Backscatter Networks
Hajar El Hassani, Mikael Gidlund
The rapid growth of Internet-of-Things (IoT) devices demands communication systems that are both spectrally efficient and energy frugal. Backscatter communication (BackCom) is an a…
math.OC2025
Multi-beam Beamforming in RIS-aided MIMO Subject to Reradiation Mask Constraints -- Optimization and Machine Learning Design
Shumin Wang, Hajar El Hassani, Marco Di Renzo +1
Reconfigurable intelligent surfaces (RISs) are an emerging technology for improving spectral efficiency and reducing power consumption in future wireless systems. This paper invest…