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About this paper
Chongwen Huang, Alessio Zappone, George C. Alexandropoulos, Mérouane Debbah, Chau Yuen
Researchers from SUTD, CentraleSupélec, and Huawei developed optimization algorithms for Reconfigurable Intelligent Surfaces (RIS) and found that RIS-based systems achieve up to 300% higher energy efficiency compared to active Amplify-and-Forward relays in multi-user MIMO cellular networks.
Key insights
- RIS-based systems achieve substantially higher energy efficiency (up to 300%) compared to active AF relay systems, primarily due to their passive nature and lower power consumption.
- There exists an optimal, finite number of RIS elements for maximizing energy efficiency, where increasing elements beyond this point diminishes overall efficiency due to increased hardware power consumption.
- Energy efficiency maximization and spectral efficiency maximization objectives diverge at higher transmit powers, highlighting a crucial trade-off between network throughput and sustainable power usage.
Summary by alphaXiv.
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