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

表1 二阶数字递归陷波器滤波系数

Table 1 Coefficients of 2nd-order digital recursive notcher

滤波系数 修正零点极点法(PZ) 双线性变换(BL) 全通滤波法(AP) a1 -1.383474172275 -1.383474172275 -1.370446677272 a2 0.956527937624 0.956527937624 0.938104277507 b1 0.978263968812 0.978263968812 0.969052138753