Adaptive Direction Control for UAV Full-Duplex Relay Networks Using Multiple Directional Antennas
Adaptive Direction Control for UAV Full-Duplex Relay Networks Using Multiple Directional Antennas
复制标题
DOI：
10.1109/access.2020.2992293
复制
发表时间：
2020-05
期刊：
影响因子：
3.9
通讯作者：
T. Matsuda;Megumi Kaneko;T. Hiraguri;K. Nishimori;Tomotaka Kimura;A. Nakao
中科院分区：
文献类型：
--
作者：
T. Matsuda;Megumi Kaneko;T. Hiraguri;K. Nishimori;Tomotaka Kimura;A. Nakao
我们考虑一个无人机（无人机）中继网络，其中每个无人机传感器的数据，并将其转发到专用的地面站通过多跳中继。特别是，我们专注于一个简单而现实的线性拓扑结构的无人机中继网络，我们提出了一个自适应方向控制方案，以实现高吞吐量的性能。在所提出的方案中，每个配备有多个定向天线的UAV选择解码转发（DF）直接中继方法或正交中继方法，用于全双工数据传输，即，在相同频率上但在不同天线上同时发送和接收数据。我们所提出的方法的独创性是使每个无人机相对于其相邻无人机的位置旋转，以优化其天线辐射方向，根据选定的中继方法。所提出的方法的主要优点是，信号方向可以控制，而不需要在传统的波束形成技术的沉重的自适应信号处理。为了澄清选择中继方法的决策参数，我们首先评估的两跳中继网络的吞吐量性能的严重干扰条件下的无人机网络，接下来，提出了一个程序选择多跳中继方法。数值实验表明，该方案能够实现高吞吐量的性能，具有较低的计算成本。
We consider a UAV (Unmanned Aerial Vehicle) relay network whereby each UAV senses data and forwards it to dedicated ground stations by means of multi-hop relaying. In particular, we focus on a UAV relay network with a simple yet realistic linear topology for which we propose an adaptive direction control scheme to achieve a high throughput performance. In the proposed scheme, each UAV, equipped with multiple directional antennas, selects either the Decode-and-Forward (DF) straight relaying method or the orthogonal relaying method, for full-duplex data transfer, i.e., data is transmitted and received simultaneously on the same frequency, but at different antennas. The originality of our proposed method is to make each UAV rotate relatively to the position of its neighbouring UAVs, in order to optimize its antenna radiation direction, according to the selected relaying method. The key advantage of the proposed method is that signal direction can be controlled without the need of heavy adaptive signal processing as in conventional beamforming techniques. In order to clarify the decision parameters for selecting a relaying method, we first evaluate the throughput performance of the two-hop relay network under the severe interference conditions of UAV networks, and next, propose a procedure for selecting a multihop relaying method. Numerical experiments show that the proposed scheme enables to achieve a high throughput performance, with low computational costs.