In addition, the stop-band rejection can be further increased by using elliptic filter function which has limited frequency transmission zeros.
另外，在函数类型上使用椭圆函数型，使带外出现有限频率传输零点，进一步提高了带外抑制能力。
2
By introducing the prior information constraint in the objective function, we can solve the ill-posed problem and band-limited problem for the impedance inversion.
通过在目标函数中增加先验知识约束，我们可以解决波阻抗反演的病态问题及带限问题。
3
Next, by the orthogonal multiresolution analysis, the necessary conditions of a kind of M-bandband-limited orthogonal wavelet function constructed by the scaling function are proposed.