探地雷达小目标信号时频特征分析
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摘要
研究了单个和两个物体的探地雷达(ground penetrating radar,GPR)信号时域和时频域特征随物体尺寸、相距距离、介电常数的变化规律,给出了广义S变换(generalized S transform,GST)参数和双峰属性频点选取的方法以及小物体的定义,讨论了通过提取时频域的双峰属性来提高对单个物体上下界面反射波和两个物体回波的分辨率.并且指出了结合GPR信号时域和时频域特征以及双峰属性,可以大致估计单个物体的大小和两个物体之间的距离范围.
The variation regularity of characteristics of ground penetrating radar(GPR) signal of one object and two objects according to the size,distance and permittivity in time domain and time-frequency domain was studied in the paper,the selection rule of parameter and frequency point of twin-peak attribute of generalized S transform(GST) as well as the definition of a small object were given,the resolution improvement of two reflections of one object and two echoes of two objects through twin-peak attribute of GST was discussed.It is pointed out that the size of one object and the distance between two objects can be roughly estimated in combination of the attribute with GPR signal characteristics in time domain and time-frequency domain.
The variation regularity of characteristics of ground penetrating radar(GPR) signal of one object and two objects according to the size,distance and permittivity in time domain and time-frequency domain was studied in the paper,the selection rule of parameter and frequency point of twin-peak attribute of generalized S transform(GST) as well as the definition of a small object were given,the resolution improvement of two reflections of one object and two echoes of two objects through twin-peak attribute of GST was discussed.It is pointed out that the size of one object and the distance between two objects can be roughly estimated in combination of the attribute with GPR signal characteristics in time domain and time-frequency domain.
引文
[1]Zhou Huilin,Wang Weiping,Zhang Qiang.Highwaypavement subsurface layer detection using air-LaunchedGPR[C]//Computational Intelligence and Design Sym-posium,2009.ISCID'09 Proceedings.Changsha,China:IEEE,2009:205-208.
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[8]高静怀,陈文超,李幼铭,等.广义S变换与薄互层地震响应分析[J].地球物理学报,2003,46(4):526-532.
[9]Stockwell R G,Mansinha L,Lowe R P.Localization ofthe complex spectrum:the S transform[J].IEEE Trans-actions on Signal Processing,1996,44(4):998-1001.
[10]王成栋,张优云,夏勇.基于S变换的柴油机气阀机构故障诊断研究[J].内燃机学报,2003,21(4):271-275.
[11]才巨宏,顾汉明,邹文.S-变换时频技术在碳酸盐岩孔洞储层预测中的应用[J].地质科技情报,2005,24(4):111-113.
[12]Pinnegar C R,Mansinha L.The S-transform with win-dows of arbitrary and varying shape[J].Geophysics,2003,68(1):381-385.
[13]邓继新,Han Dehua,王尚旭.基于正演模型的储层谱分解响应特征分析[J].石油学报,2008,29(4):539-543.
[14]Giannopoulos A.Gpr MaxV2.0:a ground penetrating ra-dar si mulation tool[EB/OL].2006-06-23.http://www.gprmax.org/.
[2]Lukyanov S P,Stukach O V.Archaeological researchesof the ancient fortress by GPR[C]//Siberian Controland Communications Conference,2009.SIBCON 2009Proceedings.Tomsk:IEEE,2009:324-331.
[3]Torrione P,Collins L.Ground response tracking for i m-proved landmine detection in ground penetrating radardata[C]//Geoscience and Remote Sensing Symposium,2006.IGARSS 2006 Proceedings.Denver:IEEE,2006:153-156.
[4]Zhang Wei,Ma Tie,Ge Linlin.Adaptive wavelet matchedalgorithmbased on subband noise[C]//I mage and Sig-nal Processing Congress,2008.CISP'08 Proceedings.Sanya,China:IEEE,2008:271-274.
[5]Strifors H C,Gustafsson A,Abrahamson S,et al.Fuzzy-cluster representation of ti me-frequency signatures as ameans for automatic classification of buried mine-liketargets[C]//Ti me-Frequency and Ti me-Scale AnalysisSymposium,1998.Proceedings of the IEEE-SP.Pitts-burgh,USA:IEEE,1998:597-600.
[6]Sun Y,Li J.Ti me-frequency analysis for plastic land-mine detection via forward-looking ground penetratingradar[J].IEEE Proceedings Radar,Sonar and Naviga-tion,2003,150(4):253-261.
[7]Zhou Huilin,Wang Yuhao.Ti me frequency representa-tions for classification of landmine using UWB i mpulseGPR[C]//Wireless Communications,Networking andMobile Computing Conference,2008.WiCOM'08 Pro-ceedings.Dalian,China:IEEE,2008:1-4.
[8]高静怀,陈文超,李幼铭,等.广义S变换与薄互层地震响应分析[J].地球物理学报,2003,46(4):526-532.
[9]Stockwell R G,Mansinha L,Lowe R P.Localization ofthe complex spectrum:the S transform[J].IEEE Trans-actions on Signal Processing,1996,44(4):998-1001.
[10]王成栋,张优云,夏勇.基于S变换的柴油机气阀机构故障诊断研究[J].内燃机学报,2003,21(4):271-275.
[11]才巨宏,顾汉明,邹文.S-变换时频技术在碳酸盐岩孔洞储层预测中的应用[J].地质科技情报,2005,24(4):111-113.
[12]Pinnegar C R,Mansinha L.The S-transform with win-dows of arbitrary and varying shape[J].Geophysics,2003,68(1):381-385.
[13]邓继新,Han Dehua,王尚旭.基于正演模型的储层谱分解响应特征分析[J].石油学报,2008,29(4):539-543.
[14]Giannopoulos A.Gpr MaxV2.0:a ground penetrating ra-dar si mulation tool[EB/OL].2006-06-23.http://www.gprmax.org/.
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