低频时码接收机高精度定时的研究  

A Study of Low Frequency Time-code Receiver High Precision Timing

作　　者：白燕[1] 吴贵臣[1] 许林生[1] 

机构地区：[1]中国科学院国家授时中心,陕西临潼710600

出　　处：《电子测量与仪器学报》2006年第3期102-105,共4页Journal of Electronic Measurement and Instrumentation

摘　　要：低频时码接收机的高精度定时问题,是研制高精度用户终端设备的关键。本文通过合理的UTC控制来选择所需要的数据段,利用三次样条插值计算载波信号的峰值点,并用最小二乘拟合得到光滑的下降曲线。该曲线的斜率最大点即为低频时码接收机的秒定时参考点。实验结果表明,采用该方法后接收机的定时精度可以达到数十微秒。The question of low frequency time-code receiver high precision timing is a key in the development of high precision timing terminal. In this paper, the reasonable data was acquired by UTC controlling, and a method based on cubic polynomial spline interpolation was proposed to compute a peak-value of the signal, and finally a smooth curve was gained by least square curve fitting. In this curve, the point which had the largest inclined rate was a timing reference point of low frequency time-code receiver. The experimental results show that the method can improve the timing precision of receiver up to38 microseconds.

关 键 词：低频时码 接收机 高精度定时 三次样条插值 最小二乘法 定时参考点 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置] P228[自动化与计算机技术—控制科学与工程]