【摘要】 小波阈值消噪法是去除信号中白噪声的有效算法。根据白噪声和信号小波系数的特点,文中提出一种分解层数自适应确定法和一种基于Nomannowsky准则的各层阈值选取法,并结合软、硬阈值法的特点,改进了小波系数阈值估计的模型。更多还原

【Abstract】 Wavelet threshold de-noising method is efficient in reducing the white noise from signal.Two new methods are proposed to decide the adaptive decomposition order and the threshold of wavelet space of each order based on Nomannowsky rule,and a proved threshold estimation model of wavelet coefficients is given upon the hard-thresholding and soft-thresholding models.更多还原