飞秒分辨率的频率测量和控制技术研究

项目名称： 飞秒分辨率的频率测量和控制技术研究

项目编号： No.61201288

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 李智奇

作者单位： 西安电子科技大学

项目金额： 25万元

中文摘要： 时频信号的测量与控制是国防、通信、导航定位等技术领域发展的确保时间基准基础技术。本项目根据目前基准频标发展的要求，针对目前时间基准，如铯，氢钟的高稳定性，利用周期性信号之间的相位关系的规律变化特点，通过有效的相位特征点的捕获和信号处理，提出了通过相位处理技术，实现飞秒分辨率的频率稳定度测量。针对目前频标的短期稳定度测量实现优于1×-14/秒的稳定度测量分辨率。针对频率测量的分辨率随着比对时间的延伸而大幅度提高的特点，以及对短期噪声影响的平均抑制技术实现1×-18/天的测量分辨率。并通过数字锁相控制技术，针对频率基准，信号输出的附加短期频率不稳定度优于2×-13/1s，附加长期频率不稳定度优于2×-15/1d。

中文关键词： 相位处理；频率稳定度测量；分辨率；相位重合；数字锁相

英文摘要： The measurement and control of the time-frequency signal is the basic technology to ensure time standards developed in many technology fields such as the national defense, communication, navigation and positioning and so on. Now on the basis of the requirements of the frequency standard development, the project according to the time standards of present, such as Cesium, Hydrogen clock, using the regularity change characteristics of phase relationship between periodic signals, by means of the effective phase feature point and the signal processing capturing, it put forward that the frequency stability measurement with fs resolution can be realized through the phase processing technology. Meanwhile, the short-term stability measurement for the frequency standards can reach better than 1×-14/s. As the feature that the frequency measurement resolution is greatly improved along with the extension of comparison time and the average inhibiting technology of the short-term noise , the measurement resolution is able to attain 1×-18/d. The additional short-term instability of the output signal can achieve better than 2×-13/1s, and the additional long-term instability can be better than 2×-15/1d with the digital phase lock control technology for frequency standards.

英文关键词： phase processing；frequency stability measurement；resolution；phase coincidence；digital phase lock