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Technical Program

Paper Detail

Paper IDD5-S6-T1.2
Paper Title Single-RF Multi-User Communication Through Reconfigurable Intelligent Surfaces: An Information-Theoretic Analysis
Authors Roy Karasik, Technion, Israel; Osvaldo Simeone, King’s College London, United Kingdom; Marco Di Renzo, Université Paris-Saclay, CNRS, CentraleSupélec, France; Shlomo Shamai, Technion, Israel
Session D5-S6-T1: Topics in Multiple Access I
Chaired Session: Friday, 16 July, 23:40 - 00:00
Engagement Session: Saturday, 17 July, 00:00 - 00:20
Abstract Reconfigurable intelligent surfaces (RISs) are typically used in multi-user systems to mitigate interference among active transmitters. In contrast, this paper studies a setting with a conventional active encoder as well as a passive encoder that modulates the reflection pattern of the RIS. The RIS hence serves the dual purpose of improving the rate of the active encoder and of enabling communication from the second encoder. The capacity region is characterized, and information-theoretic insights regarding the trade-offs between the rates of the two encoders are derived by focusing on the high- and low-power regimes.