Journal
2020 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY (ISIT)
Volume -, Issue -, Pages 2965-2970Publisher
IEEE
DOI: 10.1109/isit44484.2020.9174060
Keywords
-
Funding
- European Research Council (ERC)
- Information and Communication Technologies (ICT) under the European Union [694630, 725731, 871464]
Ask authors/readers for more resources
A communication link aided by a Reconfigurable Intelligent Surface (RIS) is studied, in which the transmitter can control the state of the RIS via a finite-rate control link. Prior work mostly assumed a fixed RIS configuration irrespective of the transmitted information. In contrast, this work derives information-theoretic limits, and demonstrates that the capacity is achieved by a scheme that jointly encodes information in the transmitted signal as well as in the RIS configuration. In addition, a novel signaling strategy based on layered encoding is proposed that enables practical successive cancellation-type decoding at the receiver. Numerical experiments demonstrate that the standard max-SNR scheme that fixes the configuration of the RIS as to maximize the Signal-to-Noise Ratio (SNR) at the receiver is strictly suboptimal, and is outperformed by the proposed strategies at all practical SNR levels.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available