Joint exploitation of pinching-antenna channel reconfiguration and base-station beamforming for self-interference mitigation

Determine how to fully exploit the channel-reconfiguration capability of pinching antenna systems and synergistically integrate it with base-station beamforming to mitigate the critical self-interference bottlenecks in full-duplex communication systems.

Background

Pinching antenna systems dynamically adjust antenna positions along dielectric waveguides, enabling large- and small-scale reconfiguration of wireless channel characteristics. Prior work investigated antenna activation in pinching-antenna-system-assisted full-duplex systems using a spatial-correlation-based algorithm, but did not resolve how to jointly use the distinctive channel-reconfiguration capability of pinching antennas and base-station beamforming for self-interference suppression.

The paper addresses this unresolved issue by formulating a weighted-sum-rate maximization problem that jointly optimizes pinching-antenna positions, base-station beamforming, and uplink transmit power. It then applies a weighted minimum mean square error reformulation and an alternating-optimization algorithm, thereby providing a solution for the specific system model considered in the paper.