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.
翻译:无人驾驶航空器的无线系统,如无线中继器和遥感,吸引了学术界和工业界的极大关注。为了实现这些系统,一个高性能的无线空中通信系统将无人驾驶航空器和地面站连接起来,是关键的促进因素之一。然而,仍然有一些问题阻碍其发展,例如无人驾驶航空器之间的严重合用通道干扰,无人驾驶航空器的有效载荷/电池寿命有限。为了应对挑战,我们提议建立一个空中通信系统,使硬件复杂性比理想的全多式通信系统更低的多部无人驾驶航空器能够进行系统级全面、全自动通信。在拟议的系统中,每个频道被重新分配给一对无人驾驶航空器的上行和下行连接,而每个无人驾驶航空器都使用一对分离的渠道来连接和下行连接。通过利用无人驾驶航空器和地面站装备的可操纵性高射线和高射线的优势来消除同一频道之间的联用通道干扰。因此,在拟议的系统中不需要专门的取消器。系统设计和性分析结果都与模拟结果一致。