Precise frequency linking method based on phase group synchronization
Precise frequency linking method based on phase group synchronization
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DOI：
10.1016/j.measurement.2014.11.016
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发表时间：
2015-02
期刊：
影响因子：
5.6
通讯作者：
Du Baoqiang;Zuo Dongyao;Feng Da-zheng;Geng Xin;Xi Guangyong;Yang Zhigang
中科院分区：
文献类型：
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作者：
Du Baoqiang;Zuo Dongyao;Feng Da-zheng;Geng Xin;Xi Guangyong;Yang Zhigang
在相位和频率的精确测量、控制和处理中，优于皮秒（ps）的测量分辨率对频标技术的改进、精确的时间和频率测量、时间或相位同步处理、宽范围、快速响应的相位噪声测量以及双基地雷达的时间和频率同步都具有重要意义。针对传统频率链接方法中频率变换复杂、测量分辨率低、频率链接精度不确定的问题，提出了一种基于相位组同步的频率链接方法。我们刻画了任意频率信号之间的最小公倍数周期，利用相位差的量化步长规律，建立了两个不同频率信号之间的相位群同步，将频率稳定度和精度从一个信号传递到另一个信号，从而实现任意信号之间的精确频率控制。实验结果表明，在量子频标中可以容易地获得10 − 12 in 1 s的频率稳定度，以及复杂而精确的频率链接。与传统的基于频率处理的频率链接方法相比，该方法具有频率链简单、成本低、频率链接精度高的优点。
In the precise measurement, control and processing of phase and frequency, the measurement resolution better than picosecond (ps) has an important significance on the improvement of the frequency standard technique, the precise time and frequency measurement, the time or phase synchronization processing, phase noise measurement with a wide range and quick response time and the time and frequency synchronization of bistatic radar. Aiming at the complex frequency transformation, the low measurement resolution and the uncertain frequency linking precision in the traditional frequency linking method, a new frequency linking method is proposed based on phase group synchronization. We characterize the least common multiple period between any frequencies signals, utilize the quantization step law of phase difference, establish the phase group synchronization between two different frequencies signals, transfer the frequency stability and accuracy from one signal to another, and thereby achieve the precise frequency control among any signals. It is shown by the experimental results that the frequency stability with 10−12in 1 s can be easily obtained in the quantum frequency standard, as well as the complex and precise frequency linking. Compared to the traditional frequency linking method based on frequency processing, the method has the advantage of the simple frequency chain, the low cost and the high frequency linking precision.