TY  - JOUR
T1  - Joint Design of Receive Beamforming and RIS Configuration for Over-the-Air Computation
AU  - Choi, Sangwoo 
AU  - Kim, Minsik 
AU  - Park, Daeyoung 
JO  - The Journal of Korean Institute of Communications and Information Sciences
PY  - 2025
DA  - 2025/1/1
DO  - 10.7840/kics.2025.50.12.1895
KW  - Over-the-air computation
KW  - beamforming
KW  - optimization
KW  - MSE minimization
KW  - 
KW  - reconfigurable intelligent
KW  - surface
AB  - This work addresses the minimization of mean-squared error (MSE) in an over-the-air system aided by reconfigurable intelligent surfaces (RIS). By jointly optimizing the receive beamforming vector at the base station and the reflection coefficients of the RIS, we aim to improve the accuracy of signal aggregation under device power constraints. We depart from conventional uniform-forcing methods by introducing a misalignment-allowed optimization (Miso) framework that improves performance. Simulations show the proposed algorithms reduce MSE significantly compared to prior methods.