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根据信号(S)和噪声(N)在小波变换下表现出的截然不同的性质,提出了一种新的滤噪方法.研究了噪音在不同细节的性质、滤噪阈值的确定及平滑与滤噪的特点.对不同S/N的示波计时电位信号进行处理的实验结果表明:小波滤噪在大大提高S/N的同时,信号强度基本不损失,优于传统的滤噪方法.
According to the different properties of signal (S) and noise (N) under the wavelet transform, a new method of filtering noise is proposed. The properties of noise in different details, the determination of filtering threshold and the smoothing and filtering Noise.The experimental results on the oscillographic chronopotentials of different S / N show that the wavelet filter is better than the traditional method of noise reduction, while the S / N is greatly improved and the signal intensity is basically not lost.