一种增强型PTP光纤级联精细时频同步方法  

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

作　　者：戴群雄[1,2] 郝青茹 王铮 左兆辉[1,2] 王士楠 DAI Qunxiong;HAO Qingru;WANG Zheng;ZUO Zhaohui;WANG Shinan(The 54th Research Institute of CETC,Shijiazhuang 050081,China;State Key Laboratory of Satellite Navigation System and Equipment Technology,Shijiazhuang 050081,China;Fareast Huaqiang Navigation&Position Co.,LTD.,Shenzhen 518000,China)

机构地区：[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

出　　处：《电子与信息学报》2021年第5期1465-1471,共7页Journal of Electronics & Information Technology

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

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。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.

关 键 词：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 

分 类 号：TN921[电子电信—通信与信息系统]