探地雷达信号的反褶积研究
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摘要
根据探地雷达信号基本子波的特点,设计了一种适宜于探地雷达信号的反褶积算法。该方法将基本子波转化为一个位于子波绝对最大值处的尖脉冲,反褶积后,子波被压缩在绝对值最大处,而不是在子波的开始。它可以有效地去除基本子波的拖尾,压缩基本子波的长度,提高信号的纵向分辨率和信噪比。通过对探地雷达实验数据和高速公路检测数据的计算,表明了该算法是一种非常有效的方法。
According to characteristics of ground-penetrating radar(GPR) signal,this paper designs a GPR deconvolution algorithm which is adapted to GPR.This deconvolution changed the wavelet into the point pulse at the absolute maximum of the wavelet.After deconvolution,the wavelet is compressed at the absolute maximum value of the wavelet,not in the beginning.This algorithm can effectively remove the delayed tail of GPR waveform,reduce length of the wavelet and to improve depth resolution of ground-penetrating radar data and the singnal-noise ratio.The calculation of GPR experimental data and the data processing of highway detection indicate that this algorithm is a very effective method.
According to characteristics of ground-penetrating radar(GPR) signal,this paper designs a GPR deconvolution algorithm which is adapted to GPR.This deconvolution changed the wavelet into the point pulse at the absolute maximum of the wavelet.After deconvolution,the wavelet is compressed at the absolute maximum value of the wavelet,not in the beginning.This algorithm can effectively remove the delayed tail of GPR waveform,reduce length of the wavelet and to improve depth resolution of ground-penetrating radar data and the singnal-noise ratio.The calculation of GPR experimental data and the data processing of highway detection indicate that this algorithm is a very effective method.
引文
[1]O¨Z Yimaz.Seismic Data:Processing,inversion and int-erpretation of seismic data[M].USA:Society of Explo-ration Geophysicists,2001.
[2]刘喜武,刘洪(Liu Xi-wu,Liu Hong).地震盲反褶积综述(Survey on seismic blind deconvolution)[J].地球物理学进展(The Geophysics Progresses),2003,18(2):203-209.
[3]刘金俊,王修田(Liu Jin-jun,Wang Xiu-tian).子波零相位化、反褶积与地震记录分辨率的关系(The relation ofzero phase wave,deconvolution and the resolution ofthe earthquake records)[J].海洋地质动态(Ocean Geo-logy Development),2000,16(4):5-8.
[3]He Ming-yi.A parallel-distributed processing for time-domain deconvolution coefficients[J].Signal Process-ing,1999,74:309-315.
[4]简小刚,梅发国,张井(Jian Xiao-gang,Mei Fa-guo,Zhang Jing).小波变换在探地雷达探测地下管线信号处理中的应用(Application of wavelet transform in pro-cessing the signals of testing underground pipe)[J].地球物理学进展(The Geophysics Progresses),2003,18(3):493-496.
[5]战玉宝,张利民,尤春安(Zhan Yu-bao,Zhang Li-min,You Chun-an).探地雷达探测地下管线的研究(Resear-ch on detecting underground pipes and cables by groundpenetration radar)[J].岩土力学(Rock and Soil Mech-anics),2004,25(9):133-136.
[6]Mingyi He,A parallel-distributed processing for time-domain deconvolution coefficients[J].Signal Process-ing,1999,74:309-315.
[7]Wang Song,Xie Li-hua,Zhang Ci-shen.MixedH2/H8deconvolution of uncertain periodic FIR channels[J].Signal Processing,2001,81:2089-2103.
[8]刘大为(Liu Da-wei).探地雷达资料的确定性反褶积处理研究(Rsearch on the deterministic deconvolution pro-cessing of ground penetrating radar data)[J].工程地球物理学报(Chinese Journal of Engineering Geophy-sis),2001,1(6):520-524.
[9]Xia Jiang-hai,Evan K Franseen,Richard D Miller,et al.Improving ground-penetrating radar data in sedimenta-ry rocks using deterministic deconvolution[J].Journalof Applied Geophysics,2003,54:15-33.
[10]Xia Jiang-hai,Evan K Franseen,Richard D Miller,et al.Application of deterministic deconvolution of ground-penetrating radar data in a study of carbonate strata[J].Journal of Applied Geophysics,2004,56:213-229.
[2]刘喜武,刘洪(Liu Xi-wu,Liu Hong).地震盲反褶积综述(Survey on seismic blind deconvolution)[J].地球物理学进展(The Geophysics Progresses),2003,18(2):203-209.
[3]刘金俊,王修田(Liu Jin-jun,Wang Xiu-tian).子波零相位化、反褶积与地震记录分辨率的关系(The relation ofzero phase wave,deconvolution and the resolution ofthe earthquake records)[J].海洋地质动态(Ocean Geo-logy Development),2000,16(4):5-8.
[3]He Ming-yi.A parallel-distributed processing for time-domain deconvolution coefficients[J].Signal Process-ing,1999,74:309-315.
[4]简小刚,梅发国,张井(Jian Xiao-gang,Mei Fa-guo,Zhang Jing).小波变换在探地雷达探测地下管线信号处理中的应用(Application of wavelet transform in pro-cessing the signals of testing underground pipe)[J].地球物理学进展(The Geophysics Progresses),2003,18(3):493-496.
[5]战玉宝,张利民,尤春安(Zhan Yu-bao,Zhang Li-min,You Chun-an).探地雷达探测地下管线的研究(Resear-ch on detecting underground pipes and cables by groundpenetration radar)[J].岩土力学(Rock and Soil Mech-anics),2004,25(9):133-136.
[6]Mingyi He,A parallel-distributed processing for time-domain deconvolution coefficients[J].Signal Process-ing,1999,74:309-315.
[7]Wang Song,Xie Li-hua,Zhang Ci-shen.MixedH2/H8deconvolution of uncertain periodic FIR channels[J].Signal Processing,2001,81:2089-2103.
[8]刘大为(Liu Da-wei).探地雷达资料的确定性反褶积处理研究(Rsearch on the deterministic deconvolution pro-cessing of ground penetrating radar data)[J].工程地球物理学报(Chinese Journal of Engineering Geophy-sis),2001,1(6):520-524.
[9]Xia Jiang-hai,Evan K Franseen,Richard D Miller,et al.Improving ground-penetrating radar data in sedimenta-ry rocks using deterministic deconvolution[J].Journalof Applied Geophysics,2003,54:15-33.
[10]Xia Jiang-hai,Evan K Franseen,Richard D Miller,et al.Application of deterministic deconvolution of ground-penetrating radar data in a study of carbonate strata[J].Journal of Applied Geophysics,2004,56:213-229.
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