5 papers
RIS-Enabled Wireless Channel Equalization: Adaptive RIS Equalizer and Deep Reinforcement Learning
Gal Ben-Itzhak, Ender Ayanoglu
Reconfigurable Intelligent Surfaces (RISs) offer a promising means of reshaping the wireless propagation environment, yet practical methods for configuring large passive arrays to…
Experimental Analysis of Biasing Voltage Generation in Wave-Controlled RIS
Miguel Saavedra-Melo, Benjamin Bradshaw, Vanessa Yao +3
Reconfigurable intelligent surfaces (RISs), an emerging technology proposed for inclusion in next generation wireless communication systems, are programmable surfaces that can adap…
Discrete Beamforming Optimization for RISs with a Limited Phase Range and Amplitude Attenuation
Dogan Kutay Pekcan, Hongyi Liao, Ender Ayanoglu
This paper addresses the problem of maximizing the received power at a user equipment via reconfigurable intelligent surface (RIS) characterized by phase-dependent amplitude (PDA)…
AI-Driven Optimization of Wave-Controlled Reconfigurable Intelligent Surfaces
Gal Ben Itzhak, Miguel Saavedra-Melo, Ender Ayanoglu +2
A promising type of Reconfigurable Intelligent Surface (RIS) employs tunable control of its varactors using biasing transmission lines below the RIS reflecting elements. Biasing st…
Alternative Channel Charting Techniques in Cellular Wireless Communications
Yonghong Jiang, Ender Ayanoglu
We investigate the use of conventional angle of arrival (AoA) algorithms the Bartlett's algorithm, the Minimum Variance Distortion Response (MVDR or Capon) algorithm, and the Minim…