AirPASS: Over-the-Air Federated Learning via Pinching Antenna Systems
AirPASS investigates over-the-air federated learning using an access point equipped with a multi-waveguide pinching antenna system (PASS). The method jointly optimizes device selection, receive beamforming, and antenna placement to maximize selected devices while controlling aggregation distortion. It achieves this via an alternating optimization framework combining homotopy methods for selection/beamforming and geometry optimization for antenna placement.