提出了一种小波包自适应滤波算法。该算法将信号的小波包分解和自适应滤波相结合,先将信号进行小波包分解,然后对子信号进行自适应滤波,最后将信号合成从而达到信号降噪的目的。使用该算法对电压信号进行降噪,结果表明小波包自适应滤波算法具有良好的降噪性能。 A wavelet packet adaptive filtering algorithm is proposed. The algorithm combines the wavelet packet decomposition and adaptive filtering of the signal, firstly decomposes the signal by wavelet packet, and then adaptively filters the sub-signal, finally synthesizes the signal to achieve the purpose of signal noise reduction. The algorithm is used to reduce the noise of the voltage signal. The results show that the wavelet packet adaptive filtering algorithm has good noise reduction performance.