提取精密控制震源信号的自适应加权匹配滤波方法

地震 ›› 2011, Vol. 31 ›› Issue (4): 133-139.

提取精密控制震源信号的自适应加权匹配滤波方法

崔仁胜, 王洪体

中国地震局地震预测研究所, 北京 100036

收稿日期:2011-02-28 修回日期:2011-03-31 出版日期:2011-10-31 发布日期:2021-09-09
作者简介:崔仁胜(1985-), 男, 安徽庐江人, 在读硕士研究生, 主要从事地震观测技术研究。
基金资助:
国家部科技支撑计划项目(2008BAC38B01)资助

An Adaptive Weighted Matched Filter for Abstracting Signals from Controlled Acurate Seismic Source

CUI Ren-sheng, WANG Hong-ti

Institute of Earthquake Science, CEA, 100036 Beijing, China

Received:2011-02-28 Revised:2011-03-31 Online:2011-10-31 Published:2021-09-09

摘要/Abstract

摘要： 为克服短时突发噪声对提取精密控制震源信号的影响, 本文研究并提出了加权匹配滤波方法。通过评估记录中的噪声时间分布取得相对应的信号段的权重, 对噪声水平高的时段分配较小的权重, 噪声水平较低的时段分配较大的权重, 进行加权匹配滤波, 达到降低短时突发噪声的影响、有效提高输出信号信噪比的目的。

关键词: 精密控制震源(CASS), 加权匹配滤波, 短时突发噪声, 信噪比

Abstract: In order to constraint the effect of short-time burst noise on the abstraction of signals from Controlled Acurate Seismic Source(CASS), a weighted matched filtering method is studied and proposed in the paper. A suitable weight is imparted to a signal segment by assessing the distribution of burst noise in this periods. Low weights are chosen for the periods with high noise level and larger weights for low noise level segment. The weighted signals are then filtered by the weighted matched filter for the purpose of reducing the impact of short-time burst noise and improving signal to noise ratio of the output signals.

Key words: CASS, Weighted matched filter, Short-time burst noise, Signal to noise ratio

中图分类号:

P315

崔仁胜, 王洪体. 提取精密控制震源信号的自适应加权匹配滤波方法[J]. 地震, 2011, 31(4): 133-139.

CUI Ren-sheng, WANG Hong-ti. An Adaptive Weighted Matched Filter for Abstracting Signals from Controlled Acurate Seismic Source[J]. EARTHQUAKE, 2011, 31(4): 133-139.