计算机技术与发展2017，Vol.27Issue(5)：201-204,4.DOI:10.3969/j.issn.1673-629X.2017.05.042
GPS/BD双模融合的高精度时间同步方法研究
Research on High-precision Time Synchronization Method with GPS/BD Dual Mode Fusion
摘要
Abstract
In order to meet the request of high precision clock for the electric power and control communication fields,a new method of software and hardware design and implementation for clock disciplining with GPS/BD dual-mode receiver has been proposed combined with the characteristics of the GPS/BD clock without random error and oscillator without accumulation error,which could improve the estimation accuracy of clock bias by fusing the GPS clock bias data and the BD clock bias data.Furthermore,the sliding median method has been employed in the software design to eliminate the abnormal data in the measurement data and the accuracy of the clock filter has been improved with unbiased FIR filtering algorithm to filter the clock bias data.Under the control of ARM processor,the control voltage for oscillator has been acquired by adopting the digital PID control algorithm and the oscillator output frequency has been adjusted with D/A converter,which aimed at achieving a fast tamable local oscillator.According to the experimental results,the time synchronization precision of the proposed method has reached 50 ns,which is higher than single mode GPS and single mode BD time synchronization system.关键词
GPS/BD双模/时间同步/锁相环技术/无偏FIR滤波Key words
GPS/BD dual-mode/time synchronization/phase-locked loop technology/unbiased FIR filter分类
信息技术与安全科学引用本文复制引用
于帆,陈伟..GPS/BD双模融合的高精度时间同步方法研究[J].计算机技术与发展,2017,27(5):201-204,4.基金项目
国家自然科学基金资助项目(60904089) （60904089）
