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- W4287795804 abstract "Recently there has been a flurry of research on the use of reconfigurable intelligent surfaces (RIS) in wireless networks to create smart radio environments. In a smart radio environment, surfaces are capable of manipulating the propagation of incident electromagnetic waves in a programmable manner to actively alter the channel realization, which turns the wireless channel into a controllable system block that can be optimized to improve overall system performance. In this article, we provide a tutorial overview of reconfigurable intelligent surfaces (RIS) for wireless communications. We describe the working principles of reconfigurable intelligent surfaces (RIS) and elaborate on different candidate implementations using metasurfaces and reflectarrays. We discuss the channel models suitable for both implementations and examine the feasibility of obtaining accurate channel estimates. Furthermore, we discuss the aspects that differentiate RIS optimization from precoding for traditional MIMO arrays highlighting both the arising challenges and the potential opportunities associated with this emerging technology. Finally, we present numerical results to illustrate the power of an RIS in shaping the key properties of a MIMO channel." @default.
- W4287795804 created "2022-07-26" @default.
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- W4287795804 date "2020-05-02" @default.
- W4287795804 modified "2023-09-27" @default.
- W4287795804 title "Reconfigurable Intelligent Surfaces for Wireless Communications: Principles, Challenges, and Opportunities" @default.
- W4287795804 doi "https://doi.org/10.48550/arxiv.2005.00938" @default.
- W4287795804 hasPublicationYear "2020" @default.
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