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MIMO Transmission through Reconfigurable Intelligent Surface: System Design, Analysis, and Implementation

Tang, W; Dai, JY; Chen, MZ; Wong, KK; Li, X; Zhao, X; Jin, S; ... Cui, TJ; + view all (2020) MIMO Transmission through Reconfigurable Intelligent Surface: System Design, Analysis, and Implementation. IEEE Journal on Selected Areas in Communications 10.1109/JSAC.2020.3007055. (In press). Green open access

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Abstract

Reconfigurable intelligent surface (RIS) is a new paradigm that has great potential to achieve cost-effective, energy-efficient information modulation for wireless transmission, by the ability to change the reflection coefficients of the unit cells of a programmable metasurface. Nevertheless, the electromagnetic responses of the RISs are usually only phase-adjustable, which considerably limits the achievable rate of RIS-based transmitters. In this paper, we propose an RIS architecture to achieve amplitude-and-phase-varying modulation, which facilitates the design of multiple-input multiple-output (MIMO) quadrature amplitude modulation (QAM) transmission. The hardware constraints of the RIS and their impacts on the system design are discussed and analyzed. Furthermore, the proposed approach is evaluated using our prototype which implements the RIS-based MIMO-QAM transmission over the air in real time.

Type: Article
Title: MIMO Transmission through Reconfigurable Intelligent Surface: System Design, Analysis, and Implementation
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JSAC.2020.3007055
Publisher version: https://doi.org/10.1109/JSAC.2020.3007055
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Reconfigurable intelligent surface, programmable metasurface, intelligent reflecting surface, MIMO transmission, high-order modulation, direct modulation
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10105839
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