全球定位系统2025，Vol.50Issue(3)：8-13,6.DOI:10.12265/j.gnss.2024196
地下大空间White Rabbit光纤时频同步技术研究
Research on White Rabbit fiber time and frequency synchronization technology in large underground space
摘要
Abstract
Aiming at the problem of time synchronization among underground large-space positioning base stations,the optical fiber time-frequency synchronization technology based on White Rabbit(WR)is studied.In view of the difficulty to calibrate the delay asymmetry coefficient of traditional two-wave bidirectional WR,the single-wave bidirectional WR is studied to solve the problem.For the single-wave bidirectional WR,even if the WR master and slave nodes use the same optical module,the central wavelength of the optical module is still not guaranteed to be exactly the same.Therefore,we analyze the fiber dispersion influence on WR time synchronization performance,and construct a time synchronization error model.In addition,a corresponding mitigation strategy is given.Using the self-developed WR engineering prototypes,the experimental verifications are performed in 50 km fiber link.The results show that the single-wave bi-direction WR can offer time synchronization accuracy better than 102 ps for the underground large-space positioning base stations.关键词
时频同步/地下大空间/单波双向/光纤光学/定位导航Key words
time and frequency synchronization/large underground space/single-wavelength bi-direction/fiber optics/positioning and navigation分类
天文与地球科学引用本文复制引用
张旭论,张京奎,蔚保国,盛传贞,易卿武,邓志鑫..地下大空间White Rabbit光纤时频同步技术研究[J].全球定位系统,2025,50(3):8-13,6.基金项目
国家重点研发计划(2021YFB3900700) （2021YFB3900700）
