【摘要】 针对Donoho去噪算法中阈值难以确定,通过分析白噪声的能量分布在子波变换域随尺度变化的规律,提出了一种采用子波变换来消除信号噪声的新算法。通过对含噪信号的求导运算实现信号与噪声在子波变换域的分离,以达到消除噪声的目的,算法的特点在于能够自动给出信号中噪声的阈值。经过测试,该算法在消除信号中的白噪声时,能够取得比较理想的效果。更多还原

【Abstract】 According to the analysis of energy distribution of white noise in wavelet domain, a new and alternative algorithm is presented for noise reduction via wavelet transform, in which the threshold for reducing noise comes out automatically and the signal and noise are separated by differential operation. And the feasibility of this algorithm on white noise reduction has shown by siumlation tests.更多还原