Fig. 1. UAV-assisted communication system model with N antennas

Fig. 2. Overall design flow chart

Fig. 3. Optimal beamforming algorithm flow chart based on SOCP

Fig. 4. Effect of total power on total rate under different number of users and different UAV locations

Fig. 5. Effect of UAV height on the total rate under different beamforming and different antenna numbers

Fig. 6. Influence of the number of users on the total rate under different beamforming methods and different antenna numbers

Fig. 7. Influence of different antenna numbers on the total speed