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| Ground Penetrating Radar Fast Back Projection Imaging Technique of Targets Located in Two Layered Medium |
| Lei Wen-tai① Zeng Sheng② Zhao Jian② Liu Jian-xin③ |
①(School of Information Science and Engineering, Central South University, Changsha 410083,China)
②(Institute of Traffic Science, Changsha University of Science and Technology, Changsha 410076, China)
③(School of Geosciences and Info-Physics, Central South University, Changsha 410083, China) |
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Abstract In Ground Penetrating Radar (GPR) applications such as detection of targets located in layered medium, the time-domain Back Projection (BP) imaging algorithm is a commonly used imaging technique. However, the heavy computation burden and low-quality imaging results limit the practical application of this algorithm. This paper presents a new Fast Back Projection (FBP) high-resolution imaging method. Firstly, a new fast time-delay calculation method based on one-dimensional search operation or a quadratic equation solving operation is presented. Secondly, a new method to improve the quality of imaging results by using weighted factor is presented and a typical weighted factor is designed. Through processing simulation data, the FBP imaging results show that the algorithm can be applied effectively to the target imaging embedded in two layered medium.
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Received: 28 October 2011
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Corresponding Authors:
Lei Wen-tai
E-mail: lei_wentai@163.com
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2012, Vol. 34 
