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math.OC2025
Reducing Simulation Effort for RIS Optimization using an Efficient Far-Field Approximation
Hans-Dieter Lang, Michel A. Nyffenegger, Heinz Mathis +1
Optimization of Reconfigurable Intelligent Surfaces (RIS) via a previously introduced method is effective, but time-consuming, because multiport impedance or scatter matrices are r…
math.OC2023
Investigating Sparse Reconfigurable Intelligent Surfaces (SRIS) via Maximum Power Transfer Efficiency Method Based on Convex Relaxation
Hans-Dieter Lang, Michel A. Nyffenegger, Heinz Mathis +1
Reconfigurable intelligent surfaces (RISs) are widely considered to become an integral part of future wireless communication systems. Various methodologies exist to design such sur…