一种增强型PTP光纤级联精细时频同步方法

戴群雄; 郝青茹; 王铮; 左兆辉; 王士楠

doi:10.11999/JEIT191057

一种增强型PTP光纤级联精细时频同步方法

doi: 10.11999/JEIT191057

戴群雄^{1, 2, ,},
郝青茹^{1, 2},
王铮^{1, 2},
左兆辉^{1, 2},
王士楠³

1.
中国电子科技集团公司第五十四研究所石家庄 050081
2.
卫星导航系统与装备技术国家重点实验室石家庄 050081
3.
深圳市远东华强导航定位有限公司深圳 518000

基金项目: 国家自然科学基金(91638203)，国家重点研发计划(2016YFB0502102)

详细信息

作者简介:
戴群雄：男，1983年生，高级工程师，研究方向为卫星导航、时间频率

郝青茹：男，1966年生，研究员，研究方向为卫星导航、时间频率

王铮：男，1988年生，高级工程师，研究方向为卫星导航、时频频率

左兆辉：男，1986年生，高级工程师，研究方向为卫星导航、时间频率

王士楠：男，1987年生，工程师，研究方向为时间频率

通讯作者:
戴群雄　daiqunxiong@126.com

中图分类号: TN921
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- 被引次数: 0
出版历程
- 收稿日期: 2019-12-31
- 修回日期: 2020-10-26
- 网络出版日期: 2020-12-11
- 刊出日期: 2021-05-18

An Enhanced Method of PTP Fiber Cascade Fine Time-frequency Synchronization

Qunxiong DAI^{1, 2
, ,},
Qingru HAO^{1, 2},
Zheng WANG^{1, 2},
Zhaohui ZUO^{1, 2},
Shinan WANG³

1.
The 54th Research Institute of CETC, Shijiazhuang 050081, China
2.
State Key Laboratory of Satellite Navigation System and Equipment Technology, Shijiazhuang 050081, China
3.
Fareast Huaqiang Navigation & Position Co., LTD., Shenzhen 518000, China

Funds: The National Natural Science Foundation of China (91638203), The National Key Research and Development Program (2016YFB0502102)

摘要

摘要: 该文提出了一种增强型PTP光纤级联精细时频同步方法，该方法以PTP同步技术为基础，结合同步以太网时钟传递技术和基于数字双混频时差法的多级级联精细时钟同步技术，对PTP技术进行改进和增强，然后基于该方法，通过多级时频设备光纤级联的形式实现多节点、大跨度、网络化的时频信号传递与同步输出，并解决多级级联情况下同步精度会逐级恶化的问题，实现ns量级的系统时间同步精度，保证系统各环节在高度统一的时间尺度下进行高效同步与联动工作。通过设计、试验，验证了该方法的可行性和有效性。
- 时频同步 /
- PTP光纤级联 /
- 增强型 /
- 同步以太网时钟传递 /
- 数字双混频时差法
Abstract: In this paper, an enhanced method of PTP fiber cascade fine time-frequency synchronization is proposed. Based on the PTP synchronization technology, combined with the synchronous Ethernet clock transfer technology and the multi-level cascade fine clock synchronization technology based on the digital double mixing time difference method, the PTP technology is improved and enhanced. Then, based on this method, the multi-level time-frequency equipment fiber cascade is used to realize the multi node, large-span and networked time-frequency signal transmission and synchronous output can solve the problem that the synchronization accuracy deteriorates step by step under the condition of multi-level cascade, realizing the ns level system time synchronization accuracy, and ensuring the efficient synchronization and linkage of all parts of the system under the highly unified time scale. The feasibility and effectiveness of the method are verified by design and test.
- Time-frequency synchronization /
- PTP fiber cascade /
- Enhanced method /
- Synchronous Ethernet clock transfer /
- Digital double mixing time difference method

HTML全文

图 1 PTP同步原理框图

下载: 全尺寸图片幻灯片

图 2 同步以太网时钟传递示意图

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图 3 级联精细时钟同步工作原理示意图

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图 4 试验验证测试连接图

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图 5 试验验证同步误差测试结果(原始时差记录数据)

下载: 全尺寸图片幻灯片

表 1 同步误差(ns)

	标准差	最大时间间隔误差(峰峰值)	最小值	最大值
第2级设备	0.3573	1.454	–0.667	0.787
第3级设备	0.4158	1.769	–0.956	0.813
第4级设备	0.2931	2.136	–0.336	1.8
第5级设备	0.4076	2.328	–0.886	1.442

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