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UAV-based wireless systems, such as wireless relay and remote sensing, haveattracted great attentions from academia and industry. To realize them, ahigh-performance wireless aerial communication system, which bridges UAVs andground stations, is one of the key enablers. However, there are still issueshindering its development, such as the severe co-channel interference amongUAVs, and the limited payload/battery-life of UAVs. To address the challenges,we propose an aerial communication system which enables system-levelfull-duplex communication of multiple UAVs with lower hardware complexitiesthan ideal full-duplex communication systems. In the proposed system, eachchannel is re-assigned to the uplink and downlink of a pair of UAVs, and eachUAV employ a pair of separated channels for its uplink and downlink. Theco-channel interference between UAVs that reuse same channels is eliminated byexploiting advantages of UAVs' maneuverability and high-gain directionalantennas equipped in UAVs and ground stations, so that dedicated cancellers arenot necessary in the proposed system. The system design and performanceanalysis are given, and the simulation results well agree with the designs.

Full-Duplex Aerial Communication System for Multiple UAVs with Directional Antennas