Antenna tilt optimization scheme of UAV base station in multi-cell millimeter wave communication system

Unmanned aerial vehicle (UAV) has the advantages of high mobility and flexibility, so it can provide broadband wireless connection in disaster areas and hot spots as air base station (BS). Millimeter wave (mm-Wave) can provide large bandwidth for UAV to achieve high data rate. For UAV mm-Wave multi-cell communication system, an antenna tilt optimization scheme for UAV-BS was proposed, which optimized the antenna array tilt angle of UAV-BS to improve the system throughput. The limit of throughput was derived when the number of UAV-BS antennas tends to infinity in this scheme, and then the relationship between tilt angle and throughput was analyzed by exhaustive search algorithm. Simulation results show that the proposed optimization scheme can improve the throughput system performance effectively.