高精度微波时频传递链路体制设计及关键技术  

System design and key technologies of high-precision microwave time-frequency transmission links

作　　者：孟志军 闫恩齐 陈林 高帅和 郭熙业[1] Meng Zhijun;Yan Enqi;Chen Lin;Gao Shuaihe;Guo Xiye(College of Intelligence Science and Technology,National University of Defense Technology,Changsha 410073,China;The 29th Research Institute of China Electronics Technology Group Corporation,Chengdu 610036,China;National Time Service Center,Chinese Academy of Sciences,Xi′an 710600,China)

机构地区：[1]国防科技大学智能科学学院,长沙410073 [2]中国电子科技集团公司第29研究所,成都610036 [3]中国科学院国家授时中心,西安710600

出　　处：《仪器仪表学报》2023年第9期102-108,共7页Chinese Journal of Scientific Instrument

摘　　要：高精度时间频率的产生和超高精度时频信号的传递是现代物理学、天文学和计量科学的基础,中国空间站高精度时频科学实验系统已随“梦天舱”成功发射,标志着我国天地融合、立体交叉的国家时频系统建设迈出了关键一步。介绍了高精度时频科学实验系统项目的基本情况以及微波时频传递链路的研究进展,重点阐述了高精度时频系统微波传递链路的信号体制设计,基于提出的信号体制设计了同频+三频两种微波时频传递链路比对模式并给出了钟差比对模型,最后通过仿真及在轨实测数据分析表明设计的微波时频传递链路可实现亚皮秒级伪距测量精度。The generation of high-precision time-frequency signals and the transmission of ultra-high-precision time-frequency signals are the foundation of modern physics,astronomy,and metrology.The high-precision time-frequency scientific experimental system of the Chinese space station has been successfully launched with the"Mengtian"cabins,which marks a crucial step in the construction of Chinese national time-frequency system with integration and interchange of space and ground.This article provides an overview of the high-precision time-frequency scientific experimental system project and the research progress of microwave time-frequency transmission links,with focus on the signal system design of the microwave transmission link in high-precision time-frequency systems.Based on the proposed signal system,two microwave time-frequency transmission link comparison modes of the same-frequency and three-frequency are designed,and a clock difference comparison model is provided.Finally,simulation and in-orbit measurement data analysis show that the designed microwave time-frequency transmission link can achieve sub-picosecond pseudo-range measurement.

关 键 词：高精度 微波链路 时频传递 信号体制 

分 类 号：TH76[机械工程—仪器科学与技术]