Phase spectrum of signals in ground Penetrating Radar applications

Sugak, V. G.; Sugak, A. V.

doi:10.1109/radar.2009.4977057

Cited by 5 publications

(6 citation statements)

References 14 publications

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“…This section is devoted to analyze the spectrum of the SFCW echo in (4). A zero-order hold system [11] is introduced to assist the analysis, as shown in Fig.…”

Section: Spectrum Analysis Of the Sfcw Echoesmentioning

confidence: 99%

“…Compared with a linear frequency modulated (LFM) waveform and short pulse, SFCW is easy to be realized, ruled and compensated in practical applications, which has been widely used in ground penetrating radar (GPR) [4]- [6] and through the wall radar (TWR)…”

Section: Introduction and Problem Formulationmentioning

confidence: 99%

“…In the conventional method, the I and Q data samples are treated as frequency-domain samples and transformed into time domain to synthesize a short pulse using inverse discrete Fourier transform (IDFT) technology. Specifically, the procedure is performed as follows[4].1) A frequency-domain array of length N , containing the complex samples I + jQ of length K (N > K), is formed so that 0 Hz corresponds to elements zero. All the remaining elements in the array are padded with zeros.…”

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confidence: 99%

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Reconstruction Filter Design for Stepped-Frequency Continuous Wave

Cui

Kong

Yang

2012

IEEE Trans. Signal Process.

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This correspondence provides an insight into the echo spectrum of stepped-frequency continuous wave (SFCW) from the view point of time domain and presents a new reconstruction filter structure. At the design stage, a zero-order hold system is introduced to analyze the spectrum of conventional SFCW echoes, and the theoretical expressions highlight that the Fourier transform (FT) technology can be applied to synthesize a short pulse, which is equivalent to the inverse Fourier transform (IFT) technology for an SFCW system. Finally, several numerical results are provided and discussed.Index Terms-Echo spectrum, reconstruction filter, stepped-frequency continuous wave (SFCW).

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“…This section is devoted to analyze the spectrum of the SFCW echo in (4). A zero-order hold system [11] is introduced to assist the analysis, as shown in Fig.…”

Section: Spectrum Analysis Of the Sfcw Echoesmentioning

confidence: 99%

Section: Introduction and Problem Formulationmentioning

confidence: 99%

mentioning

confidence: 99%

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Reconstruction Filter Design for Stepped-Frequency Continuous Wave

Cui

Kong

Yang

2012

IEEE Trans. Signal Process.

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“…Most GPR systems are based on the impulse radar technique and are prevalent in the commercial market. Because the stepped-frequency continuous wave has many advantages such as wider dynamic range, greater sensitivity, and higher immunity to radio frequency interference [ 2 , 3 ], the design and implementation of stepped-frequency continuous wave (SFCW) GPR is becoming increasingly popular [ 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. Recent development in electronic devices also remove the obstacles to implementing the SFCW GPR architecture [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…With these advantages, SFCW GPR systems are seeing more and more applications [ 14 , 15 , 16 ]. The information contained in the signal (e.g., phase, travel time, waveform, and amplitude) enable several approaches to non-invasively sense and/or monitor underground infrastructure [ 3 , 4 ], concrete [ 6 , 17 , 18 ], bridge decks [ 19 ], and roads [ 20 , 21 ]. Among all the applications, the sensing of deep underground targets and soil structure in a lossy environment is in high demand, especially for early geological-disaster warning [ 22 , 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Method for Compensating Signal Attenuation Using Stepped-Frequency Ground Penetrating Radar

Liu

Zhu

2018

Sensors

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Ground penetrating radar (GPR) is a subsurface remote sensor that allows the user to detect, classify, and identify the buried target and structures. The radar signals are rapidly attenuated as they propagate into the ground; therefore, attenuation compensation is necessary for the visualization of the buried targets from GPR data. In this work, we developed a novel attenuation compensation approach based on the recently developed stepped-frequency continuous wave (SFCW) GPR system, which is a frequency domain sampling system with improved performance in dynamic range, sensitivity, and anti-interference ability. Because the regularly used time-varying gain function for compensating the attenuation of impulse GPR data does not make full use of the advancement of the SFCW modulation, an alternative procedure is proposed herein. The new approach is based the SFCW mechanism, and aims at improving the visualization of deeper targets by compensating the SFCW GPR signal attenuation. We first present the attenuation mode of the SFCW GPR echo, from which an inverse attenuation function is derived to compensate the amplitude loss. For the field measurement where the theoretical inverse attenuation function is difficult to achieve, we introduced a pseudo time–frequency distribution for estimating the inverse attenuation function. A procedure for amplitude attenuation has also been developed. Testing with both synthetic and experimental data return a good reconstruction of the signal amplitude, subsequently improving the ability for visualizing and detecting deeper targets.

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Study on the hydrodynamic characteristics of swirl flow device

Badalova,

Badalov

2023

E3S Web Conf.

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The work examined the hydrodynamic situation, which is created by the interaction of reciprocal twisted flows and the distribution of axial velocity along the radius of the primary and secondary flow inputs and the radius of the exhaust pipe in order to create a complete physical picture. Determination of the radius distribution of the static pressure values determined by the height of the apparatus and the static pressure distribution in the exhaust pipe.

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Phase spectrum of signals in ground Penetrating Radar applications

Cited by 5 publications

References 14 publications

Reconstruction Filter Design for Stepped-Frequency Continuous Wave

Reconstruction Filter Design for Stepped-Frequency Continuous Wave

Method for Compensating Signal Attenuation Using Stepped-Frequency Ground Penetrating Radar

Study on the hydrodynamic characteristics of swirl flow device

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