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根据瞬变电磁接收信号的频率范围可将地质体响应的有用信号和干扰信号分离,利用小波变换对接收的瞬变电磁信号进行多分辨率分析,通过分解与重构,将干扰信号去除,从中提取有效信号,就得到去噪后的信号。实例的结果表明:该方法对去除瞬变电磁晚期信号的噪声干扰有较好的效果。
According to the frequency range of the transient electromagnetic receiving signal, the useful signal and the interference signal of the geologic body response can be separated. The received transient electromagnetic signal is analyzed by multi-resolution using wavelet transform. The interference signal is removed by decomposition and reconstruction Extract valid signals and get the denoised signal. The results of the example show that this method has a good effect on removing the noise from the late electromagnetic transient signal.