This letter investigates full-duplex unmanned aerial vehicle (UAV) aided small cell wireless systems, where the UAV serving as the base station (BS) is designed to transmit data to the downlink users and receive data from the uplink users simultaneously. To maximize the total system capacity, including uplink and downlink capacity, the UAV trajectory, downlink/uplink user scheduling, and uplink user transmit power are alternately optimized. The resulting optimization problem is mixed-integer and non-convex, which is challenging to solve. To address it, the block coordinate descent method and successive convex approximation techniques are leveraged. Simulation results demonstrate the significant capacity gain can be achieved by our design compared with the other designs.

中文翻译：

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全双工无人机辅助小型蜂窝无线系统的吞吐量最大化

这封信研究了全双工无人机 (UAV) 辅助小型蜂窝无线系统，其中 UAV 作为基站 (BS) 旨在同时向下行用户传输数据并从上行用户接收数据。为了最大化系统总容量，包括上下行容量，无人机轨迹、下行/上行用户调度和上行用户发射功率交替优化。由此产生的优化问题是混合整数和非凸的，这很难解决。为了解决这个问题，利用了块坐标下降法和逐次凸逼近技术。仿真结果表明，与其他设计相比，我们的设计可以实现显着的容量增益。