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为解决标准S变换中高斯窗口不能随信号的特点而改变的问题,引入广义S变换方法,推导广义S变换公式,使用Matlab语言编写计算程序,对地震面波和背景噪声数据进行了降噪处理.与去噪前的信号进行比较,研究结果表明:利用广义S变换降噪方法在处理地震波形时能很好地去掉信号中的低频噪声,有效信号更容易分辨出来.广义S变换能根据信号特征改变高斯窗口大小,从而更好反映信号和噪声特征,提高信号降噪的效果.
In order to solve the problem that the Gaussian window can not change with the signal characteristics in the standard S transform, the generalized S transform method is introduced, the generalized S transform formula is deduced, the calculation program is written in Matlab language, and the surface and background noise data are denoised Compared with the pre-denoising signals, the results show that using the generalized S-transform noise reduction method can remove the low-frequency noise in the signal well when processing the seismic waveforms, and the effective signals can be easily distinguished.The generalized S-transform can be based on the signal Features Change the size of the Gaussian window to better reflect signal and noise characteristics and improve signal noise reduction.