Large-Scale Partition-Based RIS Beamforming For Uplink RIS-Equipped Multi-User Systems: Asymptotic Analysis
The paper analyzes large-scale partition-based beamforming at a Reconfigurable Intelligent Surface (RIS) combined with zero-forcing reception for multi-user uplink systems. It derives an asymptotic closed-form approximation for average per-user SINR, showing that equal partitioning is approximately sum-rate optimal and validating the method with simulations.