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Proposing a measurement matrix is one of the researchers' concerns for compressive sensing-based signal processing. A deterministic measurement matrix with zero entries reduces the long data collecting time. In this paper a deterministic measurement matrix based on priory information about k-space in Ground Penetrating Radar (GPR) using Synthetic Aperture Radar (SAR) is proposed. Algorithm which produces...
In this paper, we propose a novel adaptive sparse decomposition method which transforms the classical parameter estimation problem into a dictionary learning problem for ground penetrating radar(GPR) signal time delay estimation(TDE). In comparison with traditional subspace-based methods, our algorithm estimates radar signal time delay by choosing a few atoms from an over-complete dictionary which...
The main challenge of ground penetrating radar (GPR) based land mine detection is to have an accurate image analysis method that is capable of reducing false alarms. However an accurate image relies on having sufficient spatial resolution in the received signal. But because the diameter of an AP mine can be as low as 2cm and many soils have very high attenuations at frequencies above 3GHz, the accurate...
Nowadays, the artificial freezing method is an important technique to construct in deep alluvium and fracture rock layers. It was needed to develop a highly efficient, highly precise and non-destructive testing method for freezing wall monitoring. Based on the partial difference function of radar waves, the similarity transformation method was used to deduce the relationship between model experiments...
The ground penetrating radar (GPR) are widely used in recent years due to its potential applications and unique capabilities, especially in the earthquake search or rescue. In this paper, a novel adaptive line enhancer (ALE) algorithm for human respiration monitoring through obstacle with low-power GPR is presented. The results of through wall experiments show that it is feasible to use this algorithm...
Testing on the depth profile of dam is an important content in the seawall project of riprap and inning. The ground penetrating radar methods can be used to get effective parameters of the profile. The structure of seawall project includes two parts, namely the primary seawall and the suppression layer of both sides. And being in the field of tide, the suppression layers are soaked by seawater everyday...
The main constructing methods of metro tunnel include shield tunneling method (TBM) and mining method. The quality of the tunnel constructed by mining method is less stable than by TBM. Various faults may occur during the construction. The tunnel should be inspected by reliable inspecting methods. The inspecting practices in Shenzhen metro indicate that ground penetrating radar (GPR) can be used to...
Ground-penetrating radar (GPR) is a remote sensing technique used to obtain information on subsurface features from data collected over the surface. The process of collecting data may be viewed as mapping from the object space to an image space. Since most GPRs use broad beamwidth antennas, the energy reflected from a buried structure is recorded over a large lateral aperture in the image space. A...
In Artificial Freezing Engineering(AFE), the distribution of freezing soil and its defects are important to engineering safety. Based on relative permittivity measured by vector network analyzer, electromagnetic models of artificial freezing walls were made. Then Ground Penetrating Radar (GPR) exploration of AFE was simulated by Time Domain Finite Element Method (TD-FEM) coupled with freezing temperature...
Based on the dielectric constant distinction between frozen and unfrozen soils, Ground Penetrating Radar(GPR) were widely used on frozen soils detection. However, the study of frozen soils dielectric constant was focused on the natural permafrost at land surface, and there were no current research achievement about deep frozen soils dielectric constant. Traditional methods such as Common Middle Point...
Ridgelet is the new development of wavelet dealing with line singularities in signals. In goundpenetrating radar (GPR) signal, the direct wave is a strong noise which has line singularity. In time-space domain, the useful information in GPR signal is badly polluted by strong direct wave so that the underground targets can not be recognized correctly. Ridgelet overcomes the disadvantages of wavelets...
Ground Penetrating Radar(GPR) is a promising technology to detect and identify buried Anti-Personnel (AP) non-metallic mines. This paper focusses on GPR signal processing and identification methods. The Wavelet Transform (WT) method is used to analyse impulsive GPR signals scattered by an AP plastic mines. The instantaneous parameters of the signals are calculated. In order to increase the amplitude...
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