利用小波包分解算法进行原子钟信号的消噪处理

Eliminating the Noise of Atomic Clock Signal by Using Wavelet Packets Decomposition Algorithm

高准确度时间在国防、科研等领域正在发挥着日益重要的作用 ,要提高计算原子时的准确度 ,消除原子钟信号的噪声是关键的步骤之一。为此 ,我们利用小波包分解算法对原子钟信号进行了必要的消噪处理 ,这样我们得到了平稳的原子钟信号 ,利用这些数据重新计算国家授时中心原子时TA(NTSC) ,计算结果表明经过消噪处理提高了TA(NTSC)稳定度和准确度 ,可以考虑进一步在我国的地方原子时计算中采用该方法。

It is necessary for achieving the more accurate atomic (TA) time to eliminate the noise of the atomic clock signal. In this paper, we have developed processing method that uses the wavelet packets decomposition algorithm and obtained the stable data. Using this smoothing data and another algorithm, the more accurate and stable locate atom time of National Time Service Center (TA(NTSC))is calculated, our results indicated that this a useful algorithm for calculating TA.