基于数字递归陷波的多通道瞬变电磁法周期噪声去除研究

张文伟, 底青云, 耿启立, 雷达, 王中兴, 缪佳佳

The removal of MTEM periodic noise based on digital recursive notching

Wen-Wei ZHANG, Qing-Yun DI, Qi-Li GENG, Da LEI, Zhong-Xin WANG, Jia-Jia MIAO

图7 非均匀半空间大地脉冲响应周期噪声去除 a—包含空气波的大地脉冲响应与含噪信号;b—不包含空气波的大地脉冲响应与含噪信号;c~e——为(a)中含噪信号的陷波结果;f~h—为(b)中含噪信号的陷波结果

Fig.7 Removal of periodic noise in impulse response of inhomogeneous earth a—impulse response with air wave and contaminated signal by 50 Hz sinusoidal noise; b—impulse response without air wave and contaminated signal by 50 Hz sinusoidal noise; c~e— are notch result of noised signal in (a); f~h— are notch result of noised signal in (b)