3D SAR imaging for dry wall inspection using an 80 GHz FMCW radar with 25 GHz bandwidth

Lang, Simon R.; Demming, Matthias; Jaeschke, Timo; Noujeim, Karam; Konynenberg, Aart; Pohl, Nils

doi:10.1109/mwsym.2015.7166863

Cited by 12 publications

(4 citation statements)

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“…1(d)) [11]. A 3D SAR reconstruction could be generated by utilizing a combination of Carrara and Gorham algorithms, for example, or a complete 3D SAR algorithm could be implemented [12][13] [14][15] [16][17] [18]. In the absence of a 3D algorithm, a series of 2D scans with an increasingly tilted target or transceiver can remove the location ambiguity of scatterers distributed in the third dimension (e.g.…”

Section: Methodsmentioning

confidence: 99%

Millimeter Wave and Terahertz Synthetic Aperture Radar for Locating Metallic Scatterers Embedded in Scattering Media

Richard

Everitt

2017

IEEE Trans. THz Sci. Technol.

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Abstract:A rail-mounted synthetic aperture radar has been constructed to operate at W-band (75 -110 GHz) and a THz band (325 -500 GHz) in order to ascertain its ability to locate isolated small, visually obscured metallic scatterers embedded in highly scattering dielectric hosts that are either semi-transparent or opaque. A "top view" 2D algorithm was used to reconstruct scenes from the acquired data, locating metallic scatterers at W-band with high range and cross-range resolution of 4.3 and 2 mm, respectively, and with improved range resolution of 0.86 mm at the THz band. Millimeter-sized metallic scatterers were easily located when embedded in semitransparent, highly scattering target hosts of Styrofoam and waxy packing foam but were more difficult to locate when embedded in relatively opaque, highly scattering Celotex panels.Although the THz band provided the expected greater spatial resolution, it required the target to be moved closer to the rail and had a more limited field of view that prevented some targets from being identified. Techniques for improving the signal to noise ratio are discussed. This work establishes a path for developing techniques to render a complete 3D reconstruction of a scene.

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Section: Methodsmentioning

confidence: 99%

Millimeter Wave and Terahertz Synthetic Aperture Radar for Locating Metallic Scatterers Embedded in Scattering Media

Richard

Everitt

2017

IEEE Trans. THz Sci. Technol.

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“…Ultrawide-band 3D-SAR imaging using robotic arms have been demonstrated using milllimeter-Wave FMCW-Radars [5], [6], [7]. In this article, we concentrate on a chirped radar with a lower center frequency of 8 GHz, yielding better material penetration properties.…”

Section: Introductionmentioning

confidence: 99%

Robotic control for cognitive UWB radar

Bruggenwirth

Rial

2019

World Scientific Encyclopedia With Semantic Computing and Robotic Intelligence

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In the article, we describe a trajectory planning problem for a 6-DOF robotic manipulator arm that carries an ultra-wideband (UWB) radar sensor with synthetic aperture (SAR). The resolution depends on the trajectory and velocity profile of the sensor head. The constraints can be modelled as an optimization problem to obtain a feasible, collision-free target trajectory of the end-effector of the manipulator arm in Cartesian coordinates that minimizes observation time. For 3Dreconstruction, the target is observed in multiple height slices. For Through-the-Wall radar the sensor can be operated in sliding mode for scanning larger areas. For IED inspection the spot-light mode is preferred, constantly pointing the antennas towards the target to obtain maximum azimuth resolution.

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“…Most of the TWRI systems [ 1 , 21 , 22 ] using FMCW signals adopt synthetic aperture radar (SAR) signal processing, which requires a movement of the radar and a huge amount of data processing. Thus, even though SAR yields a high quality TWRI, SAR-based TWRI systems may not be suitable in situations in which information regarding what is behind walls must be obtained rapidly, i.e., terror attacks, military purposes, rescue situations, etc.…”

Section: Introductionmentioning

confidence: 99%

Dual Channel S-Band Frequency Modulated Continuous Wave Through-Wall Radar Imaging

Kim

et al. 2018

Sensors

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This article deals with the development of a dual channel S-Band frequency-modulated continuous wave (FMCW) system for a through-the-wall imaging (TWRI) system. Most existing TWRI systems using FMCW were developed for synthetic aperture radar (SAR) which has many drawbacks such as the need for several antenna elements and movement of the system. Our implemented TWRI system comprises a transmitting antenna and two receiving antennas, resulting in a significant reduction of the number of antenna elements. Moreover, a proposed algorithm for range-angle-Doppler 3D estimation based on a 3D shift invariant structure is utilized in our implemented dual channel S-band FMCW TWRI system. Indoor and outdoor experiments were conducted to image the scene beyond a wall for water targets and person targets, respectively. The experimental results demonstrate that high-quality imaging can be achieved under both experimental scenarios.

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3D SAR imaging for dry wall inspection using an 80 GHz FMCW radar with 25 GHz bandwidth

Cited by 12 publications

References 12 publications

Millimeter Wave and Terahertz Synthetic Aperture Radar for Locating Metallic Scatterers Embedded in Scattering Media

Millimeter Wave and Terahertz Synthetic Aperture Radar for Locating Metallic Scatterers Embedded in Scattering Media

Robotic control for cognitive UWB radar

Dual Channel S-Band Frequency Modulated Continuous Wave Through-Wall Radar Imaging

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