光纤时间频率传输数字相位补偿方法  

A Method of Digital Phase Compensation for Time and Frequency Transfer via Fiber

作　　者：李孝峰[1,2] 梁双有[1] 张首刚[1] 

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院研究生院,北京100039

出　　处：《时间频率学报》2009年第2期115-119,共5页Journal of Time and Frequency

基　　金：国家自然科学基金资助项目(60672007);中国科学院重要方向资助项目(KJCX2-YW-T12)

摘　　要：为提高光纤时间频率传输的精度,提出了数字移相补偿方法。该方法采用单片机量化发送端和接收端射频信号的相位差,然后再控制数字移相器调整发送端射频信号相位,使二者相位趋于一致,实现传输光纤引起相位变化的前置补偿,从而提高时间频率传输精度。实验表明,该系统可将发射端信号和接收端信号的相位差减少到5°以内。In order to improve the precision of time/frequency transfer via fiber, a method of digital phase compensation is proposed. In this method, the signal phase difference between sender and receiver is digitized by a single-chip microcomputer, and the signal phase of sender is shifted by a digital phase shifter, so as to decrease the signal phase difference and complete the phase precompensation, thereby improving the precision of time/frequency transfer. The experiments show that the phase difference between sender and receiver can be decreased to less than 5 degree.

关 键 词：光纤 时间频率传输 数字移相器 前置补偿 

分 类 号：TN911[电子电信—通信与信息系统]