Unmanned aerial vehicle (UAV)-satellite communication has drawn dramaticattention for its potential to build the integrated space-air-ground networkand the seamless wide-area coverage. The key challenge to UAV-satellitecommunication is its unstable beam pointing due to the UAV navigation, which isa typical SatCom on-the-move scenario. In this paper, we propose a blind beamtracking approach for Ka-band UAVsatellite communication system, where UAV isequipped with a large-scale antenna array. The effects of UAV navigation arefirstly released through the mechanical adjustment, which could approximatelypoint the beam towards the target satellite through beam stabilization anddynamic isolation. Specially, the attitude information can be realtimelyderived from data fusion of lowcost sensors. Then, the precision of the beampointing is blindly refined through electrically adjusting the weight of themassive antennas, where an array structure based simultaneous perturbationalgorithm is designed. Simulation results are provided to demonstrate thesuperiority of the proposed method over the existing ones.
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