| 原子时的小波分解算法 |
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| 引用本文： | 李孝辉,柯熙政,焦李成.原子时的小波分解算法[J].时间频率学报,2000,23(1):26-33. |
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| 作者姓名： | 李孝辉 柯熙政 焦李成 |
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| 作者单位： | 1. 中国科学院陕西天文台,陕西省临潼,710600
2. 西安电子科技大学,西安,710071 |
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| 摘 要： | 时间尺度的就是根据一组原子钟的数据，用统计的方法计算出平均的时间尺度。其目的是使综合时间尺度的噪声最小。一般的原子时算有脱离经典加权的局限性，只能抑制原子钟的栽一种噪声。运用小波分解的方法建立以分解原子时，将原子信号在小汉域按频率尺度分解原，然后在不同频率范围加权，这种方法不但考虑不同原子钟在同一个频率分量的不同稳定度，而且考虑不同频率分量的不同稳定度，它有着独特的优越性。
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| 关 键 词： | 原子时 算法 小波分解 原子钟 |
An Atomic Time Scale Algorithm Using Wavelet Decomposition |
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| LI Xiao-Hui,KE Xi-Zheng,JIAO Li-Cheng.An Atomic Time Scale Algorithm Using Wavelet Decomposition[J].Journal of Time and Frequency,2000,23(1):26-33. |
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| Authors: | LI Xiao-Hui KE Xi-Zheng JIAO Li-Cheng |
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| Abstract: | The weight of atomic clock is assigned traditionally based on its historical performance. The algorithms pay attention to the long term instability of atomic clock and can't respond to the change of clock. In this paper,an algorithm for atomic time scale is proposed based on wavelet decomposition method. For this algorithm,the clock signal is decomposed in various frequency range,the instability is expressed with wavelet variance, and the clock is weighted for various frequency range. This method takes into consideration both short term and long term instabilities of atomic clock, and it is better than other algorithms. This algorithm has been tested with the data from Shaanxi Astronomical Observatory. |
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| Keywords: | Time Scale Algorithm Wavelet Decomposition |
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