WiFi‐based imaging for ground penetrating radar applications: fundamental study and experimental results

Feng, Weike; Friedt, Jean‐Michel; Hu, Zhipeng; Cherniak, Grigory; Suzuki, Motoyuki

doi:10.1049/joe.2019.0209

Cited by 7 publications

(9 citation statements)

References 15 publications

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“…The proposed MBWC is conceptually inspired by passive imaging schemes, which are widely utilized in the areas of radar and seismic exploration [19][20][21][22][23] . Passive imaging seeks to locate or detect an object of interest based on clutter signals or background noise and requires a directional reference antenna for calibrating the noncooperative illumination signal, or an antenna array for retrieving a so-called response matrix.…”

Section: Programmable Metasurface For Backscatter Communicationmentioning

confidence: 99%

Metasurface-assisted massive backscatter wireless communication with commodity Wi-Fi signals

et al. 2020

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Conventional wireless communication architecture, a backbone of our modern society, relies on actively generated carrier signals to transfer information, leading to important challenges including limited spectral resources and energy consumption. Backscatter communication systems, on the other hand, modulate an antenna's impedance to encode information into already existing waves but suffer from low data rates and a lack of information security. Here, we introduce the concept of massive backscatter communication which modulates the propagation environment of stray ambient waves with a programmable metasurface. The metasurface's large aperture and huge number of degrees of freedom enable unprecedented wave control and thereby secure and high-speed information transfer. Our prototype leveraging existing commodity 2.4 GHz Wi-Fi signals achieves data rates on the order of hundreds of Kbps. Our technique is applicable to all types of wave phenomena and provides a fundamentally new perspective on the role of metasurfaces in future wireless communication.

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Section: Programmable Metasurface For Backscatter Communicationmentioning

confidence: 99%

Metasurface-assisted massive backscatter wireless communication with commodity Wi-Fi signals

et al. 2020

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“…where Φ is the measurement matrix with size N 1 × N that used to sample s 0 according to the criterion Although (16) is a non-deterministic polynomial-time hard (NPhard) problem, a number of computationally efficient algorithms can be used, such as the smooth L0 (SL0) algorithm and orthogonal matching pursuit (OMP) algorithm [32,33]. However, for these conventional SR/CS based algorithms, as formulated by (16), the expected frequencies are assumed to be located at fix discretised grids [∆f τ 1 , ∆f τ 2 , ..., ∆f τ L ]. The off-grid problem, i.e the mismatch between the pre-defined frequency grid and the actual frequency of signal, may cause the performance degradation [34,35].…”

Section: Anm Based Dpi Suppressionmentioning

confidence: 99%

“…Techniques of moving target detection and localization, high resolution SAR and inverse SAR imaging, and direction of arrival (DOA) estimation based on the PBR system have been proposed during the last decades [8][9][10][11][12]. For short range applications [13][14][15][16], such as tracking indoor human beings or man-made objects, through the wall target movement detection, and subsurface target mapping by ground penetrating radar (GPR) technique, a suitable IO should be exploited to satisfy the system requirement. Among different IOs, wireless local area network (LAN) may be a good choice for its wide bandwidth (40 / 80 MHz) and thus high range resolution (7.5 / 3.75 m in the air), its reasonable ambiguity function, its wide accessibility and coverage, and its wall/ground penetration capacity.…”

Section: Introductionmentioning

confidence: 99%

Direct path interference suppression for short‐range passive bistatic synthetic aperture radar imaging based on atomic norm minimisation and Vandermonde decomposition

Feng

Friedt

Cherniak

et al. 2019

IET Radar, Sonar & Navigation

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A novel direct path interference (DPI) suppression method is proposed in this paper for passive bistatic synthetic aperture radar (SAR) imaging applications. Conventional time-domain processing methods cannot mitigate the DPI completely and will introduce errors into the target position estimation. By exploiting the sparsity of the DPI signal and the properties of its covariance matrix, the proposed method solves these problems by accurately estimating the time delay of DPI based on the atomic minimization algorithm and Vandermonde decomposition in the frequency domain. The amplitude of DPI is then calculated by the least squares method. Simulations and experimental results of Wireless Fidelity (WiFi) based passive bistatic SAR imaging of short-range targets show that the proposed method can suppress DPI more effectively and estimate the position of the target more accurately than the classical method.

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“…Since the piezoelectric substrate of the SAW sensor will convert an incoming electromagnetic signal into an acoustic signal whose velocity depends on the temperature of transducer, the phase of the echoes of the SAW sensor will be changed by the temperature variation of the concrete. Therefore, as shown by [13][14], by exploiting the phase information of the SAW sensor detected by the GPR system, an interferometric process can be used to estimate the temperature change.…”

Section: Introductionmentioning

confidence: 99%

A Half-Cut Compact Monopole Antenna for SFCW Radar-Based Concrete Wall Monitoring With a Passive Cooperative Target

Guo

Feng

Friedt

et al. 2020

IEEE Geosci. Remote Sensing Lett.

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HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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WiFi‐based imaging for ground penetrating radar applications: fundamental study and experimental results

Cited by 7 publications

References 15 publications

Metasurface-assisted massive backscatter wireless communication with commodity Wi-Fi signals

Metasurface-assisted massive backscatter wireless communication with commodity Wi-Fi signals

Direct path interference suppression for short‐range passive bistatic synthetic aperture radar imaging based on atomic norm minimisation and Vandermonde decomposition

A Half-Cut Compact Monopole Antenna for SFCW Radar-Based Concrete Wall Monitoring With a Passive Cooperative Target

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