Search Results - George C. Alexandropoulos
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Active Reconfigurable Intelligent Surfaces: Circuit Modeling and Reflection Amplification Optimization
Published 2025-01-01Get full textReconfigurable Intelligent Surfaces (RISs) constitute a promising emerging technology that enables wireless systems to control the propagation environment to enhance diverse communication objectives. To mitigate double-fading attenuation in RIS-aided links, the paradigm of active metamaterials capab...
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Wireless communications empowered by reconfigurable intelligent surfaces: Model-based vs model-free channel estimation
Published 2023-09-01Get full textReconfigurable intelligent surfaces (RISs) are lately being attractive for their great potential in future sixth generation wireless communications (6G), which is attributed to their affordable energy consumption and easy integration. However, the large numbers of low-cost reflecting elements compri...
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