Sensors & Transducers



Vol. 254, Issue 7, December 2021, pp. 16-21





1 Nana Feng, 2 Miao Miao, 2 Zhiqi Li, 2, * Wei Zhou and 3 Zhuang Cai



1 Yan’an University, Area A, Chuangxin Port Campus, Xi'an Jiaotong University, Chang'an District, Xi'an City, Shaanxi Province, 716000, China

2 Xidian University, No. 2, Taibai South Road, Xidian University, Yanta District, Xi'an City, Shaanxi Province, 710071, China

3 Shaanxi Hua Xing Electronic Information Group co., LTD, No. 16 Wenhui East road, Xianyang City, 712000, China

1 Tel.: 13572973973

E-mail: wzhou@xidian.edu.cn



Received: 25 October 2021 /Accepted: 7 December 2021 /Published: 30 December 2021





Abstract: The implementation of the atomic clock circuit usually adopts frequency processing scheme. However, the quantization error in frequency processing greatly limits the frequency stability of the atomic clock’s output from theoretical calculations. This paper analyzes the cause of quantization error and its relationship with the degree of signal synchronization. Based on this relationship, we study the effect of phase synchronization on frequency stability and explore how to effectively suppress quantization errors to improve measurement accuracy. Experiments show that using the regularity of phase information obtain continuous and lossless phase information. It can improve the accuracy of the gate acquisition and reduce the influence of quantization errors. Frequency stability can be improved from 1/t 1/2 to 1/t. The research on this relationship can be applied in various fields, such as high precision measurement of time and frequency, communication technology, navigation signal processing, and even defense science and technology for essential improvements.


Keywords: Frequency stability, Phase synchronization, Frequency measurement, Frequency processing, Quantization error.

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