摘要
针对分布式雷达组网等对高精度时间同步的需求,在基于伪码测距的卫星双向时间比对系统基础上,利用光纤双向传输链路替代无线射频传输链路,开展基于伪码测距的光纤双向时间比对技术验证试验,采用单纤双向双波长的光信号传输体制实现了高精度光纤双向时间比对。试验结果表明,在105 km光纤链路上,光纤链路受环境变化引起的时延波动几乎被完全抵消,实测时间比对精度优于30 ps。
Aiming at the demand of high⁃precision time synchronization for distributed radar networking.On the basis of satellite two⁃way time comparison system based on PN code ranging,using optical fiber two⁃way comparison link instead of radio frequency trans⁃mission link,the verification test of optical fiber two⁃way time comparison technology based on PN code ranging is carried out.And the high precision optical fiber two⁃way time comparison is realized by using single fiber two⁃way optical transmission system.Test results show that,on a 105 km optical fiber link,it can avoid the interference due to the asymmetry of optical fiber on the round trip link,and the time comparison accuracy is better than 30 ps.
作者
彭丽
王正勇
王崇阳
PENG Li;WANG Zhengyong;WANG Chongyang(Unit 93160,PLA,Beijing 100071,China;The 54th Research Institute of CETC,Shijiazhuangi 050081,China)
出处
《无线电通信技术》
2021年第4期503-506,共4页
Radio Communications Technology
关键词
伪码测距
光纤
时间比对
高精度
PN code ranging
optical fiber
time comparison
high precision