Two-Timescale Antenna Movement for UAV-Mounted Movable Antenna-Enabled Integrated Sensing and Communication

This letter proposes a two-timescale antenna movement framework for an unmanned aerial vehicle (UAV)-mounted movable antenna (MA)-enabled integrated sensing and communication (ISAC) system. To reduce the overhead of channel state information (CSI) acquisition in practical applications, the UAV moves at the large timescale based on statistical CSI to mitigate large-scale path loss, while the MA moves at the small timescale based on instantaneous CSI to effectively exploit small-scale channel fading caused by the random superposition of multipath components. To jointly optimize the UAV and MA positions as well as the transmit beamforming vector, a double-loop algorithm is developed. Simulation results demonstrate that the proposed antenna movement scheme effectively enhances ISAC performance over conventional schemes and approaches the ideal upper bound.