飞行自组织网的全双工双向时间传递技术研究

陈聪; 徐强; 赵宏志; 邵士海; 唐友喜

doi:10.11999/JEIT230949

飞行自组织网的全双工双向时间传递技术研究

doi: 10.11999/JEIT230949

陈聪^{1, 2},
徐强^{1, 2},
赵宏志^{1, 2},
邵士海^{1, 2, ,},
唐友喜¹

1.
电子科技大学通信抗干扰全国重点实验室成都 611731
2.
电磁空间认知与智能控制技术实验室北京 100089

基金项目: 国家自然科学基金(U19B2014, 62071094, 61901396)

详细信息

作者简介:
陈聪：男，博士生，研究方向为通信网络协议、无线通信信号处理等

徐强：男，副研究员，研究方向为无线通信信号处理、太赫兹通信技术等

赵宏志：男，教授，博士生导师，研究方向为同时同频全双工、无线通信抗干扰技术等

邵士海：男，教授，博士生导师，研究方向为无线通信信号处理、抗干扰与安全通信等

唐友喜：男，教授，博士生导师，研究方向为同时同频全双工、扩频与移动通信等

通讯作者:
邵士海　ssh@uestc.edu.cn

中图分类号: TN919.34
计量
- 文章访问数: 224
- HTML全文浏览量: 155
- PDF下载量: 39
- 被引次数: 0
出版历程
- 收稿日期: 2023-08-31
- 修回日期: 2023-12-05
- 网络出版日期: 2023-12-13
- 刊出日期: 2024-07-29

Research on Full-duplex Two-Way Time Transfer Techniques for Flying Ad Hoc Networks

CHEN Cong^{1, 2},
XU Qiang^{1, 2},
ZHAO Hongzhi^{1, 2},
SHAO Shihai^{1, 2
, ,},
TANG Youxi¹

1.
National Key Laboratory of Wireless Communications, University of Electronic Science and Technology of China, Chengdu 611731, China
2.
Laboratory of Electromagnetic Space Cognition and Intelligent Control, Beijing 100089, China

Funds: The National Natural Science Foundation of China (U19B2014, 62071094, 61901396)

摘要

摘要: 针对飞行自组网(FANET)中节点间相对运动导致双向时间传递精度下降的问题，该文提出一种全双工双向时间传递(TWTT)方法。首先，根据全双工双向时间传递过程构造了需要求解的方程组，推导了单次时间传递的同步误差表达式；然后，分析了在无频偏和有频偏条件下，迭代进行全双工双向时间传递的收敛性；最后，通过仿真分析和实验验证比较了全双工双向时间传递方法和传统双向时间传递方法的性能。仿真和实验结果表明，全双工双向时间传递方法在节点高速机动下，时间同步精度可达到与物理层时间戳相同的精度，优于现有的运动补偿方法。
- 飞行自组网 /
- 带内全双工 /
- 双向时间传递 /
- 非对称传播时延
Abstract: In order to solve the problems of time synchronization accuracy degradation of two-way time transfer due to relative motion between nodes in Flying Ad hoc NETwork (FANET), a full-duplex Two-Way Time Transfer (TWTT) method is proposed. Firstly, a system of equations to be solved is constructed according to the full-duplex two-way time transfer procedure, and the synchronization error expression for single full-duplex two-way time transfer is derived. Then, the convergence of iteratively performing full-duplex two-way time transfer with or without frequency offset is analyzed. Finally, the performance of full-duplex two-way time transfer method is compared with traditional two-way time transfer methods by simulation analysis and experimental validation. The simulation and experimental results show that full-duplex two-way time transfer method can achieve the same time synchronization accuracy as the physical layer timestamps under high-speed maneuvering between nodes, and the synchronization accuracy is better than the existing motion compensation methods.
- Flying Ad hoc NETwork (FANET) /
- In-Band Full Duplex (IBFD) /
- Two-Way Time Transfer (TWTT) /
- Asymmetric propagation delay

HTML全文

图 1 全双工双向时间传递流程

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图 2 无频偏下的全双工时间同步误差

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图 3 有频偏下的全双工时间同步误差

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图 4 频偏和移动速度对时间同步误差的影响

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图 5 四类运动情况下同步性能对比

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图 6 实验验证所用设备及场景

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表 1 小型化软件无线电平台设备指标

参数	指标
处理芯片	Xilinx XC7Z100
射频收发芯片	ADI AD9371
工作频段	1.4～1.7 GHz
最大信号带宽	≤100 MHz
发射通道个数	2
最大发射功率	≥35 dBm
发射衰减可调范围	0～30 dB
接收通道个数	4
接收增益可调范围	0～60 dB
重量	≤800 g
体积	150 mm×100 mm×45 mm

下载: 导出CSV

表 2 物理层链路与信道模拟器指标

参数	指标
工作频段	1.4～1.7 GHz
帧长度	400 μs
基带采样率	15.36 MSps
射频采样率	153.6 MSps
物理层时间戳精度	约6.51 ns
模拟传输距离	1～10 km
模拟径向移动速度	0 m/s, 100 m/s, 200 m/s
模拟参数更新周期	10 ms

下载: 导出CSV

表 3 秒脉冲偏差测试结果

相对移动速度	协议	秒脉冲偏差(ns)
相对移动速度	协议	最大值	最小值	均值
静止	全双工协议	0.86	0.94	0.90
静止	PTP协议	0.33	0.41	0.38
100 m/s	全双工协议	–1.23	–1.14	–1.18
100 m/s	PTP协议	6.85	6.91	6.88
200 m/s	全双工协议	1.71	1.77	1.75
200 m/s	PTP协议	12.24	12.34	12.30

下载: 导出CSV

参考文献(19)

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