Reconfigurable intelligent surface: design the channel – a new opportunity for future wireless networks

Abstract

In this paper, we survey state-of-the-art research outcomes in the burgeoning field of Reconfigurable Intelligent Surface (RIS), given its potential for significant performance enhancement of next-generation wireless communication networks by means of adapting a propagation environment. Emphasis has been placed on several aspects gating the commercial viability of future network deployment. Comprehensive summaries are provided for practical hardware design considerations and broad implications of artificial intelligence techniques, as are in-depth outlooks on the salient aspects of system models, use cases, and physical layer optimization techniques.

Keywords

• Reconfigurable intelligent surface
• MIMO
• Channel estimation
• Beamforming
• Reflectarray
• Transmitarray