时间尺度域匹配滤波器的设计与实现
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摘要
根据地震褶积模型,设计并实现了应用于探地雷达回波信号检测的时间尺度域匹配滤波器,利用小波变换的时间定位性和尺度伸缩性,检测出雷达接收信号中单个反射子波的位置与强弱信息,利用已知的雷达发射子波模型还原回波信号,达到了滤除噪声、最佳接收的目的.通过用传统相关匹配滤波方法和本方法对探地雷达接收数据进行比较试验发现:当信噪比比较低时,传统方法已经不能准确地检测出雷达子波,而本方法仍能准确的检测出90%的雷达子波.这表明,本方法具有更好的子波检测和滤波性能.
According to the seismic convolution model, a kind of matched filters in time-scale domain is designed for echo signal detection of Ground Penetrating Radar (GPR) and implemented in this paper, which is applied to detect the location and amplitude of single reflection wavelet in receiving signal through continuous wavelet transform. Then the radar-transmitting wavelet is used to revert to the echo signal. Finally, through the experiment on the practical data of Ground Penetrating Radar, we proved the feasibility of the algorithm and gained an advantage over the classic matched filtering, that is, when the classic algorithm is not available, 90 percent of the wavelet can be detected accurately using our algorithm.
According to the seismic convolution model, a kind of matched filters in time-scale domain is designed for echo signal detection of Ground Penetrating Radar (GPR) and implemented in this paper, which is applied to detect the location and amplitude of single reflection wavelet in receiving signal through continuous wavelet transform. Then the radar-transmitting wavelet is used to revert to the echo signal. Finally, through the experiment on the practical data of Ground Penetrating Radar, we proved the feasibility of the algorithm and gained an advantage over the classic matched filtering, that is, when the classic algorithm is not available, 90 percent of the wavelet can be detected accurately using our algorithm.
引文
[1] 李大心.探地雷达方法及应用[M].北京:地质出版社,1994.LiDa xin.Method andApplication ofGroundPene tratingRadar[M].Beijing:GeologyPress,1994.
[2] 林茂庸,柯有安.雷达信号理论[M].北京:国防工业出版社,1984.LinMao yong,KeYou an.RadarSignalTheory[M].Beijing:NationalDefenseIndustryPress,1984(Ch).
[3] WehnerD R.HighResolutionRadar[M].London:ArtechHouseBoston,1995.
[4] 张晓平,田立生,彭应宁.时间尺度域的匹配滤波器与信号检测[J].电子学报,1996,24(6):8791.ZhangXiao ping,TianLi sheng,PengYing ning.MatchedFilters inTimeScaleDomain and itsApplica tion inSignalDetection[J].Journal ofElectronics,1996,24(6):8791(Ch).
[5] 詹 毅,梁昌洪,方广有.探地雷达回波信号处理中小波变换域滤波方法的研究[J].西安电了科技大学学报,1999,26(3):305309.ZhanYi,LiangChang hong,FangGuang you.StudyofWaveletDomainFilteringTechnique in theProcess ing of theReceivedSignals of aGroundPenetratingRadar[J].Journal ofXidianUniversity,1999,26(3):305309(Ch).
[6] 高静怀,汪文秉,朱光明.地震资料处理中小波函数的选取研究[J].地球物理学报,1996,39(3):392400.GaoJing huai,WangWen bing,ZhuGuang ming.OnTheChoice ofWaveletFunctionsForSeismicDataProcessing[J].Journal ofGeophysics,1996,39(3):392400(Ch).
[7] 徐伯勋,白旭滨,于常青.地震勘探信息技术:提取、分析和预测[M].北京:地质出版社,2001.XuBo xun,BaiXuBin,YuChang qing.TheTech nology ofEarthquakeReconnaissanceInformation:Distilling,Analysis, andForecasting[M].Beijing:GeologyPress,2001(Ch).
[8] 王俊茹.工程与环境地震勘探技术[M].北京:地质出版社,2002.WangJun ru.TheTechnology ofProject andEnvi ronmentEarthquakeReconnaissance[M].Beijing:Ge ologyPress,2002(Ch).
[9] 彭玉华.小波变换与工程应用[M].北京:科学出版社,1999.PengYu hua.WaveletTransform andProjectAp plication[M].Beijing:SciencePress,1999(Ch).
[10]杨福生.小波变换的工程分析与应用[M].北京:科学出版社,2001.YangFu sheng.TheProjectAnalysis andApplica tion ofWaveletTransform[M ].Beijing:SciencePress,2001(Ch).
[2] 林茂庸,柯有安.雷达信号理论[M].北京:国防工业出版社,1984.LinMao yong,KeYou an.RadarSignalTheory[M].Beijing:NationalDefenseIndustryPress,1984(Ch).
[3] WehnerD R.HighResolutionRadar[M].London:ArtechHouseBoston,1995.
[4] 张晓平,田立生,彭应宁.时间尺度域的匹配滤波器与信号检测[J].电子学报,1996,24(6):8791.ZhangXiao ping,TianLi sheng,PengYing ning.MatchedFilters inTimeScaleDomain and itsApplica tion inSignalDetection[J].Journal ofElectronics,1996,24(6):8791(Ch).
[5] 詹 毅,梁昌洪,方广有.探地雷达回波信号处理中小波变换域滤波方法的研究[J].西安电了科技大学学报,1999,26(3):305309.ZhanYi,LiangChang hong,FangGuang you.StudyofWaveletDomainFilteringTechnique in theProcess ing of theReceivedSignals of aGroundPenetratingRadar[J].Journal ofXidianUniversity,1999,26(3):305309(Ch).
[6] 高静怀,汪文秉,朱光明.地震资料处理中小波函数的选取研究[J].地球物理学报,1996,39(3):392400.GaoJing huai,WangWen bing,ZhuGuang ming.OnTheChoice ofWaveletFunctionsForSeismicDataProcessing[J].Journal ofGeophysics,1996,39(3):392400(Ch).
[7] 徐伯勋,白旭滨,于常青.地震勘探信息技术:提取、分析和预测[M].北京:地质出版社,2001.XuBo xun,BaiXuBin,YuChang qing.TheTech nology ofEarthquakeReconnaissanceInformation:Distilling,Analysis, andForecasting[M].Beijing:GeologyPress,2001(Ch).
[8] 王俊茹.工程与环境地震勘探技术[M].北京:地质出版社,2002.WangJun ru.TheTechnology ofProject andEnvi ronmentEarthquakeReconnaissance[M].Beijing:Ge ologyPress,2002(Ch).
[9] 彭玉华.小波变换与工程应用[M].北京:科学出版社,1999.PengYu hua.WaveletTransform andProjectAp plication[M].Beijing:SciencePress,1999(Ch).
[10]杨福生.小波变换的工程分析与应用[M].北京:科学出版社,2001.YangFu sheng.TheProjectAnalysis andApplica tion ofWaveletTransform[M ].Beijing:SciencePress,2001(Ch).
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