| 光纤时间频率传输数字相位补偿方法 |
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| 引用本文： | 李孝峰,梁双有,张首刚.光纤时间频率传输数字相位补偿方法[J].时间频率学报,2009,32(2):115-119. |
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| 作者姓名： | 李孝峰 梁双有 张首刚 |
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| 作者单位： | 1. 中国科学院国家授时中心,西安,710600;中国科学院研究生院,北京,100039
2. 中国科学院国家授时中心,西安,710600 |
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| 基金项目： | 国家自然科学基金，中国科学院重要方向资助项目 |
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| 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似内。
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| 关 键 词： | 光纤 时间频率传输 数字移相器 前置补偿 |
A Method of Digital Phase Compensation for Time and Frequency Transfer via Fiber |
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| LI Xiao-feng,LIANG Shuang-you,ZHANG Shou-gang.A Method of Digital Phase Compensation for Time and Frequency Transfer via Fiber[J].Journal of Time and Frequency,2009,32(2):115-119. |
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| Authors: | LI Xiao-feng LIANG Shuang-you ZHANG Shou-gang |
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| Institution: | LI Xiao-feng, LIANG Shuang-you, ZHANG Shou-gang (1. National Time Service Center, Chinese Academy of Sciences, Xi＇an 710600, China; 2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China) |
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| Abstract: | 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. |
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| Keywords: | fiber time/frequency transfer digital phase shifter precompensation |
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