基于纠缠信号的高精度时钟同步技术研究

时钟同步是导航定位系统的重要组成部分，其精度将直接影响系统的定位精度。本文提出了一种基于纠缠信号的时钟同步方案，通过调整光延迟单元，使 HOM 干涉仪达到平衡， 通过时钟 A 和 B 分别记录下纠缠光子达到的时间，分析这些时间序列的内在相关性，提取时钟 A 和 B 之间的时间差，以实现对时钟 A 和 B 的同步。该方法可以有效地抑制背景噪声的影响，同步精度高。

High Accuracy Clock Synchronization Based on Entangled Signal

As an important part of navigation and positioning system, high accurate clock synchronization has a direct bearing on the positioning accuracy of the system. A clock synchronization scheme based on entangled signal is proposed. The HOM interferometer is balanced by adjusting an optical delay unit, the time of arrival of simultaneously generated photons is recorded by Clock A and Clock B, and a correlation on the time of arrival is analyzed to determine the clock offset from Clock A and Clock B, ensuring that Clock A is synchronized with Clock B. This method is used to effectively eliminate effects of background noise and achieve high accurate clock synchronization.