相位差群特性下的频率控制技术

doi:10.3969/j.issn.1001-2400.2017.05.019

西安电子科技大学学报

相位差群特性下的频率控制技术

贾兆旻1,2,3;李智奇4;杨旭海1,2;孙保琪1,2;苗苗4;董绍锋4

(1. 中国科学院国家授时中心，陕西西安 710600；
2. 中国科学院大学，北京100049;
3. 唐山学院智能与信息工程学院，河北唐山063020;
4. 西安电子科技大学机电工程学院，陕西西安 710071)

收稿日期:2016-11-01 出版日期:2017-10-20 发布日期:2017-11-29
作者简介:贾兆旻(1982-)，男，中国科学院大学博士研究生，E-mail: 375247025@qq.com
基金资助:
国家自然科学基金资助项目(61201288,11403017,11503019,11173026)

Frequency signal control based on the characteristic of the phase difference group

JIA Zhaomin1,2,3;LI Zhiqi4;YANG Xuhai1,2;SUN Baoqi1,2;MIAO Miao4;DONG Shaofeng4

(1. National Time Service Centre, Chinese Academy of Sciences, Xi'an 710600, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Intelligence and Information Engineering College, Tangshan University, Tangshan 063020, China;
4. School of Mechano-electronic Engineering, Xidian Univ., Xi'an 710071, China)

Received:2016-11-01 Online:2017-10-20 Published:2017-11-29

摘要/Abstract

摘要：

在不同频率标称值信号间的相位差变化具有群连续特性的情况下，提出了不同频率标称值信号间进行直接数字化锁相的方法．该方法利用模数转换器提取被控频率的数字电压值，此电压值反映了被控频率的相位信息，提取出过零点的电压值形成闸门的开关点，求得被控频率的小频偏值，以此输出控制电压信号，进而控制高稳压控振荡器，将被控频率锁定．实验结果表明，由于省去了大量频率变换线路，降低了复杂电路所引起的噪声影响，实现了高精度锁定，被控频率短期稳定度可达到10^-12/s的量级，并且具有良好的相噪指标．

关键词: 频率控制, 相位差群, 锁相环, 频率稳定度

Abstract:

Based on thecontinuous character of the phase difference group between frequency signals of different nominal values, a method for direct digital phase lock between the different nominal value signals is proposed. The A/D converter is utilized to extract digital voltage value of the controlled frequency signal,whichreflects the phaseinformation. The switch point of the gate is generated by extracting the zero-crossing digital voltage value,then the frequency offset is obtained, on the basis of which the control voltage is obtained to control VCOCXO, and the frequency is locked. The experiment shows that the noise brought by the common complex circuit is reduced because of the simplified frequency transformation circuits, so that high precise locking is realized. The short term stability can reach the 10^-12/s order of magnitude,and the phase noise index is good.

Key words: frequency control, phase difference group, phase locked loop, frequency stability

贾兆旻;李智奇;杨旭海;孙保琪;苗苗;董绍锋. 相位差群特性下的频率控制技术[J]. 西安电子科技大学学报, 2017, 44(5): 109-113.

JIA Zhaomin;LI Zhiqi;YANG Xuhai;SUN Baoqi;MIAO Miao;DONG Shaofeng. Frequency signal control based on the characteristic of the phase difference group[J]. Journal of Xidian University, 2017, 44(5): 109-113.

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相位差群特性下的频率控制技术

Frequency signal control based on the characteristic of the phase difference group

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