小波变换是一种把时间和频率结合起来的时频分析方法,D.L.Dohono在小波变换的基础上提出了小波软、硬阈值消噪法,此方法简单有效,得到了广泛的重视和研究。在经典的小波软、硬阈值消噪方法的基础上,提出了一种基于小波包分析的改进方法。Matlab仿真结果表明,此法同时克服了软、硬阈值方法的缺点,而且其消噪效果比小波消噪方法要好。 Wavelet transform is a time-frequency analysis method combining time and frequency. D.L.Dohono proposed a wavelet soft and hard threshold denoising method based on wavelet transform. This method is simple and effective and has received extensive attention and research. Based on the classical wavelet soft and hard threshold denoising methods, an improved method based on wavelet packet analysis is proposed. Matlab simulation results show that this method overcomes the shortcomings of the soft and hard threshold methods at the same time, and its denoising effect is better than the wavelet denoising method.