一种增强型PTP光纤级联精细时频同步方法

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。

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

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.