【作者】 胡进峰；

【导师】 周正欧；

【作者基本信息】 电子科技大学 ， 信号与信息处理， 2005， 博士

【摘要】 探地雷达是一种通过超宽带电磁波进行地下探测的无损探测技术，在国防和国民经济建设方面正得到日益广泛的应用。国际上早在80年代末90年代初就已经基本解决了探地雷达系统硬件设计上的诸多难题，而探地雷达的信号处理技术相对来说还不成熟，因而近年来研究重点转向了信号处理技术的研究，近年来国际上发表的探地雷达文章中，绝大部分文章都是研究探地雷达的信号处理方法，因此本文也定位于探地雷达信号处理方法的研究。 早先的探地雷达都是用于中深层探测的，在超宽带技术成熟并应用于探地雷达后，探地雷达才逐渐应用于浅地层探测。因此，与中深层应用的探地雷达相比，探测浅地层的探地雷达的研究时间较短，浅地层探地雷达信号处理技术还不成熟。而在浅地层探测中，地雷等浅埋小目标的探测，对浅地层探地雷达的信号处理方法提出了更高的要求。此外，探测浅埋小目标时，要求雷达具有较高的分辨率，因此合成孔径探地雷达成为研究热门。本文主要研究合成孔径探地雷达浅地层探测应用中的浅埋小目标的探测的信号处理方法。 探地雷达按照体制不同可以分为：无载频脉冲雷达，步进频率探地雷达等；按照系统配置不同可以分为：下视探地雷达，前视探地雷达，机载探地雷达等。 其中，无载频脉冲探地雷达是目前实际使用最广泛的探地雷达；步进频率探地雷达是近年来国际上的热门研究内容，国内目前还没有研制出步进频率探地雷达系统，且国内对步进频率探地雷达技术的研究还很少；前视探地雷达是近年出现的新型探地雷达，目前国内还没有其他单位研究前视合成孔径探地雷达。本文在国防“十五”预研项目基金的支持下对无载频下视脉冲探地雷达、步进频率下视探地雷达的信号处理算法做了系统的研究，并在自然科学基金的支持下对前视探地雷达的关键技术做了有成效的研究。 所用数据主要来自欧盟反雷研究中心以及作者所在课题组采集的数据。所述各种处理方法对作者能得到的探地雷达数据的处理都是有效的，但是限于篇幅，各章并没有列出全部数据的处理结果。本文的主要工作及创新点如下： 1．讨论了目前最常用的三种探地雷达杂波抑制方法，并在分析这三种杂波抑制方法各自优缺点的基础上，针对基于SaS的杂波抑制方法提出了改进，并提出了一种定量衡量探地雷达杂波抑制效果的方法；最后，用三种常用方法和更多还原

【Abstract】 Ground Penetrating Radar (GPR) is a nondestructive technology that detect underground by the Ultra Wide Band (UWB) electromagnetic wave. GPR is used in the building of national defence and national economy increasingly. A good many difficult problems for the design of the GPR hardware has been solved at 80’s or 90’s.The signal processing of GPR is not very mature comparatively, and so more and more research is devoted to the GPR signal processing. This paper is also absorbed in the research of the GPR signal processing.GPR were used to detect deep layer underground early. GPR is used to detect shallow layer until the UWB technology is developed and used to GPR, so the history of shallow layer detection is shorter compared with the history of middle depth layer detection and deep layer detection, and so the GPR signal processing of shallow layer detection is under developing. In the shallow layer detection, the detection of small target buried shallowly requires more complex signal processing method. The detection of target buried shallowly requires higher resolution further, so the research of the synthetic aperture GPR is more pop. This paper is devoted to the research of the detection of small target buried shallowly.According to the GPR system, GPR can be assorted as impulse GPR, Step Frequency GPR (SFGPR), and etc. According to the configuration of GPR, GPR can be assorted as Down-Looking GPR (DLGPR), Forward-Looking GPR (FLGPR), Air Borne GPR (ABGPR), and etc.DLGPR is the most applied in all GPR. SFGPR is the pop research in the international GPR field, and there is no SFGPR developed inland. FLGPR is the new type GPR and there isn’t other units to research it inland. In this paper the author researches the signal processing method of the down-looking impulse GPR and the step frequency down looking GPR, and also does a effective work in the research of the key technology of FLGPR.The used data come mostly from the JRC and the experiment did by the author’s group. All the signal method proposed in this paper is effective for all the data, but limited to the space, the author doesn’t give all the result of all the data in every chapter. The main work and the innovation is showed as follow:更多还原