多级微分频谱整形滤波器的理论研究

Theoretical Study on Multiple-Order Differential Spectrum Shaping Filter.

文章从分析地层吸收衰减特性入手 ,提出了两种解决高频可记录性的微分频谱整形滤波器设计方案。具有原理简单、电路实现容易和高频吸收补偿效果明显等优点。通过对华北平原区 2 .0s目的层反射波的理论分析表明 ,当微分阶次大于等于 2时 ,采用两种微分频谱整形滤波器均可使记录频带扩展为原来的两倍或更高 。

In this paper, we analyse typical Earth′s absorption character and give two design methods of spectral shaping filter,which can solve the problem of high frequency signal recording, and the methods have the advantages of a simple principle, a easy realized circuit and an obvious absorption energy compensation of high frequency components, and so on. Theoretical analyses of reflection from 2.0s reflector in northern China plain showes the frequency band of seismic wave can be expanded twice or much more after filtering by two kinds of differential filters. When differential oreder is equal to or more than two, the seismic resolution is improved greatly.