Indexed Multiple Access with Reconfigurable Intelligent Surfaces: The Reflection Tuning Potential
Indexed modulation (IM) is an evolving technique that has become popular due to its ability of parallel data communication over distinct combinations of transmission entities. In this article, we first provide a comprehensive survey of IM-enabled multiple access (MA) techniques, emphasizing the shortcomings of existing non-indexed MA schemes. Theoretical comparisons are presented to show how the notion of indexing alleviates the limitations of non-indexed solutions.We also discuss the benefits of utilizing a reconfigurable intelligent surface (RIS) when deployed as an indexing entity. In particular, we propose an RIS-indexed multiple access (RIMA) transmission scheme that utilizes dynamic phase tuning to embed multi-user information over a single carrier. The performance of the proposed RIMA is assessed using simulation results that confirm its performance gains. The article further includes a list of relevant open technical issues and research directions.
History
Publication status
- Published
File Version
- Accepted version
Journal
IEEE Communications MagazineISSN
0163-6804Publisher
Institute of Electrical and Electronics Engineers (IEEE)Publisher URL
External DOI
Page range
1-7Department affiliated with
- Engineering and Design Publications
Notes
© 20XX IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Full text available
- Yes
Peer reviewed?
- Yes