  UAV-based wireless systems, such as wireless relay and remote sensing, have
attracted great attentions from academia and industry. To realize them, a
high-performance wireless aerial communication system, which bridges UAVs and
ground stations, is one of the key enablers. However, there are still issues
hindering its development, such as the severe co-channel interference among
UAVs, and the limited payload/battery-life of UAVs. To address the challenges,
we propose an aerial communication system which enables system-level
full-duplex communication of multiple UAVs with lower hardware complexities
than ideal full-duplex communication systems. In the proposed system, each
channel is re-assigned to the uplink and downlink of a pair of UAVs, and each
UAV employ a pair of separated channels for its uplink and downlink. The
co-channel interference between UAVs that reuse same channels is eliminated by
exploiting advantages of UAVs' maneuverability and high-gain directional
antennas equipped in UAVs and ground stations, so that dedicated cancellers are
not necessary in the proposed system. The system design and performance
analysis are given, and the simulation results well agree with the designs.
