| 摘要: |
| 为满足测控系统对高精度时间频率的要求，设计了一种基于时间数字转换器(TDC)的驯服恒
温晶振系统。使用GPS对恒温晶振进行实时校准，获得了高精度的频率信号。通过TDC测量时
差数据计算得到恒温晶振的频率准确度，其时差测量精度达到250 ps。采用优化的递推平均
滤波算法对时差数据进行滤波处理，消除了GPS秒信号抖动引入的干扰，缩短了频率驯服时
间，频率驯服精度优于3×10-11。 |
| 关键词: 测控系统 时间频率系统 时间同步 时间数字转换器 GPS驯服 恒温晶振 |
| DOI： |
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| 基金项目: |
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| Design of a GPS Disciplined OCXO System Based on TDC |
| LU Jia-hai,ZHANG Tong-shuang,TAO Xiao-hong,CHEN Hao-qian,LI Chun-hai |
| (Shanghai Jiaotong University, Shanghai 200030, China;2.China Satellite Maritime Tracking and Control Department,Jiangyin 214431,China) |
| Abstract: |
| In order to furnish the measurement and control system with high precision time and frequency signal, a disciplined OCXO(Oven-Controlled Crystal Oscillator) system based on TDC(Time-to-Digital Converter) i
s designed. With the OCXO system′s real time calibration by GPS, the highly pre
cise frequency signal can be got. Frequency precision of the OCXO system is
calculated by measured interval data with TDC, whose resolution can reach 250 p
s. After the interval data processed with optimized recursive average filter alg
orithm, interference of GPS second dithering can be avoided and disciplined tim
e of frequency can be shortened. |
| Key words: measurement and control system time-frequency system time synchronization time to digital converter GPS disciplined oven-controlled crystal oscillator |
