基于北斗卫星系统的频率标准源的设计与实现

Frequency Standard Source based on the Beidou Satellite System

在对北斗二代导航定位接收机输出的1PPS信号进行测试、分析、研究的基础上,采用数字滤波器滤波和电压的积分控制相结合的方法,滤除信号传输过程中的干扰,使其输出相对平稳的1PPS信号来驯服铷原子频标。研究北斗接收机驯服铷钟原子频标的模型,采用精密时间间隔测量、高精度数字比相、计算机自动控制等多种先进技术,完成对铷原子频标的跟踪控制,实现与星载铷钟同等精度的时频信号输出。研制了一套北斗接收机驯服铷原子频率标准源,该频率标准携带方便,性价比高,既可以为时统、通讯系统提供现场计量技术保障,又可以实现对原子频率标准的远程校准、核查。

The paper is based on testing, analysis and study of 1 PPS signal of Beidou second gen- eration navigation positioning receiver output. Using the method of combing digital filter and voltage inte- gral control, filters out interference in the process of signal transfer, make it output relatively stable 1 PPS signal to tame rubidium atomic frequency standard, It studies the model that Beidou receiver tames the rubidium atomic frequency standard. It uses some advanced technology, such as precision time interval measurement, high precision digital phase, computer automatic control, completes the tracking control rubidium atomic frequency standard, to realize the same accuracy time-frequency signal output which is equal to satellite-borne rubidium clock. It develops a set of Beidou receiver tames the rubidium atomic frequency standard, which is portable and high cost performance, and can provide the on-site measure- ment technical support, also can realize rernnt~ rnl;hr^t; ,4 .,~..;~.：~_ c__ L_