Network Localization and Synchronization Using Full-Duplex Radios
Network Localization and Synchronization Using Full-Duplex Radios
复制标题
使用全双工无线电的网络定位和同步
DOI：
10.1109/tsp.2017.2770090
复制
发表时间：
2018-02-01
影响因子：
5.4
通讯作者：
Win, Moe Z.
中科院分区：
文献类型：
--
作者：
Liu, Yan;Shen, Yuan;Win, Moe Z.
移动的节点的定位和同步对于无线网络是重要的。在本文中，我们提出了新的方法，网络定位和同步（NLS）使用全双工无线电通过只有两个帧的传输。具体地，所有节点在第一帧中同时发送它们的签名信号，同时经由全双工无线电接收其他节点的信号。在第二帧中，节点发送它们在第一帧中接收到的信号的加扰版本或者接收到的信号的信道参数估计的数字分组。我们开发分布式算法来估计接收信号中不同分量的到达时间。然后，这些到达时间用于确定本地网络几何形状和时钟偏移。推导了节点间距离和时钟偏移的Cramér-Rao下界，并将其转化为节点位置的误差界.与传统的频分双工或时分双工相比，我们展示了NLS使用全双工无线电的高效率，揭示了其在未来无线网络中超越数据通信的潜力。
Both localization and synchronization of mobile nodes are important for wireless networks. In this paper, we propose new methods for network localization and synchronization (NLS) using full-duplex radios through only two frames of transmission. Specifically, all nodes simultaneously transmit their signature signals in the first frame, while receiving others’ signals via full-duplex radios. In the second frame, nodes transmit either scrambled versions of their received signals in the first frame or a digital packet of the channel parameter estimates of the received signals. We develop distributed algorithms to estimate the arrival times of different components in the received signals. These arrival times are then used to determine the local network geometry and clock offsets. The Cramér-Rao lower bounds for internode distances and clock offsets are derived, and the former can be translated into error bounds of the node positions. Compared with conventional frequency division duplex or time-division duplex, we demonstrate the high efficiency of NLS using full-duplex radios, revealing its potential beyond data communications in future wireless networks.