One of the key enablers for the realization of a variety of unmanned aerial vehicle (UAV)-based systems is the high-performance communication system linking many UAVs and ground station. We have proposed a spectrum-efficient full-duplex directional-antennas-equipped multi-UAV communication system with low hardware complexity to address the issues of low spectrum efficiency caused by co-channel interference in areal channels. In this paper, by using the prototype system including UAVs and ground station, field experiments are carried out to confirm the feasibility and effectiveness of the proposed system's key feature, i.e., co-channel interference cancellation among UAVs by directional antennas and UAV relative position control, instead of energy-consuming dedicated self-interference cancellers on UAVs in traditional full-duplex systems. Both uplink and downlink performance are tested. Specially, in downlink experiment, channel power of interference between a pair of two UAVs is measured when UAVs are in different positional relationships. The experiment results agree well with the designs and confirm that the proposed system can greatly improve the system performance.
翻译:实现各种无人驾驶航空器(无人驾驶航空器)系统的关键促进因素之一是将许多无人驾驶航空器和地面站连接在一起的高性能通信系统。我们提议了一个具有低硬件复杂性的全频高效全双向antennas设备多式无人驾驶航空器通信系统,以解决由隔热通道干扰隔热通道在隔热通道中造成的低频效率问题。在本文件中,通过使用包括无人驾驶航空器和地面站在内的原型系统,进行了实地实验,以确认拟议系统的关键特征的可行性和有效性,即通过定向天线和无人驾驶航空器相对位置控制来取消无人驾驶航空器之间的联合通道干扰,而不是传统的全双向系统内耗能的专用自动干扰取消装置。测试了上下链和下链的性能。特别在下链试验中,在无人驾驶航空器处于不同位置关系时,对两对无人驾驶航空器之间的通道干扰力进行了测量。试验结果与设计十分一致,并确认拟议系统能够大大改进系统性能。