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首页> 外文期刊>Aerospace and Electronic Systems, IEEE Transactions on >Wireless Relay Communications with Unmanned Aerial Vehicles: Performance and Optimization
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Wireless Relay Communications with Unmanned Aerial Vehicles: Performance and Optimization

机译：与无人机的无线中继通信：性能和优化

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摘要

In this paper, we investigate a communication system in which unmanned aerial vehicles (UAVs) are used as relays between ground-based terminals and a network base station. We develop an algorithm for optimizing the performance of the ground-to-relay links through control of the UAV heading angle. To quantify link performance, we define the ergodic normalized transmission rate (ENTR) for the links between the ground nodes and the relay, and derive a closed-form expression for it in terms of the eigenvalues of the channel correlation matrix. We show that the ENTR can be approximated as a sinusoid with an offset that depends on the heading of the UAV. Using this observation, we develop a closed-form expression for the UAV heading that maximizes the uplink network data rate while keeping the rate of each individual link above a certain threshold. When the current UAV relay assignments cannot meet the minimum link requirements, we investigate the deployment and heading control problem for new UAV relays as they are added to the network, and propose a smart handoff algorithm that updates node and relay assignments as the topology of the network evolves.
机译：在本文中，我们研究了一种通信系统，其中无人飞行器（UAV）被用作地面终端和网络基站之间的中继。我们开发了一种通过控制无人机航向角来优化地面对中继链路性能的算法。为了量化链路性能，我们为地面节点和中继之间的链路定义了遍历归一化的传输速率（ENTR），并根据信道相关矩阵的特征值为其得出了封闭形式的表达式。我们表明，ENTR可以近似为正弦曲线，其偏移量取决于无人机的航向。使用此观察，我们为UAV航向开发了一种封闭形式的表达式，该表达式可最大化上行链路网络数据速率，同时将每个单独链路的速率保持在一定阈值以上。当当前的UAV中继分配不能满足最低链路要求时，我们将研究将新的UAV中继添加到网络中时的部署和航向控制问题，并提出一种智能切换算法，将节点和中继分配作为节点的拓扑更新网络不断发展。

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