Indoor imagery with a 3D through-wall synthetic aperture radar

Sévigny, Pascale; DiFilippo, D.; Laneve, Tony; Fournier, Jonathan

doi:10.1117/12.919781

Cited by 5 publications

(4 citation statements)

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“…Related to TWRI, a lot of research areas have been explored in previous works, including wall parameter estimation [ 20 ], compensation for refraction due to the wall [ 6 ], SAR for high resolution [ 22 ], and so far. Since we focused on presenting a low complexity TWRI algorithm, the other research topics related to TWRI are not addressed in this paper.…”

Section: System Modelmentioning

confidence: 99%

“…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%

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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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Section: System Modelmentioning

confidence: 99%

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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“…[13] concerned the problem of drone separation from discrete clutter (birds) using motion characteristics. The reduction methods for another type of discrete clutter reflected from buildings were studied in refs [14–17].…”

Section: Introductionmentioning

confidence: 99%

A design of a high‐resolution frequency modulated continuous wave radar for drone detection based on spurious phase noise and discrete clutter reduction

Vu Hop,

Cao Quyen,

Van Loi

2023

IET Radar Sonar & Navi

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The authors deal with the problem of the design and manufacture of a high‐resolution FMCW radar for drone detection and classification. The difficulties of the problem are discrete clutter reduction and spurious phase noise mitigation. The discrete clutter is due to the reflected signals from land vehicles, birds etc., while the spurious phase noise is inherent in the radar signal due to the phase‐locked loop component and leakage between the transmitting and receiving paths. Both spurious phase noise and clutter will increase the system noise level and hence reduce the probability of detection of small targets such as drones and induce false alarms on the radar screen. In order to reduce discrete clutter, the authors propose a method to separate a drone from discrete clutter based on the design of the radar system parameters for a drone and its propeller detection, target's Doppler dispersion and moving characteristics. For spur mitigation, a method that focuses on the design of the isolation coefficient between transmitting and receiving paths to decrease the power of spurs below the minimum power requirement at the input of the analogue‐to‐digital converter is introduced. The results were applied by the authors to the development and manufacture of a radar with the given specifications for drone detection and classification. Different laboratory and field tests show that the spurs are mitigated and the drones are separated from discrete clutter with a range and accuracy better than the one recently published.

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“…Typically, by using point scattering focusing, multipath reflections are also focused, leading to false alarms that clutter the image. Due to the confusion and false alarms, (visual) interpretation of focused radar images is difficult without prior knowledge of the building structure, [7], [8]. Furthermore, by using (monostatic) imaging concepts, it is unlikely that walls parallel to the radar line-of-sight can be detected since they give rise to diffuse scattering in the direction of the radar.…”

Section: Introductionmentioning

confidence: 99%

Extraction of Building Features from Stand-Off Measured Through-Wall Radar Data

Wit¹,

Rossum²

2016

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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Automated extraction of building features is a great aid in synthesizing building maps from radar data. In this paper, a model-based method is described to detect and classify canonical scatters, such as corners and planar walls, inside a building. Once corners and walls have been located, a building map can be synthesized. To detect and classify the canonical scatterers, sparse reconstruction with an overcomplete dictionary is used. The dictionary is tuned to phase models that are specific to the different canonical scatterers, i.e., a linear phase change for walls and a quadratic phase change for corners. This is a potentially robust method for detecting canonical scatterers because the polynomial degree of the measured phase is preserved, even after propagation through a wall. Building-feature extraction results obtained with actually stand-off measured through-wall radar data are discussed.Index Terms-Overcomplete dictionary (OCD), radar imaging, sparse reconstruction, through-wall radar.

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Indoor imagery with a 3D through-wall synthetic aperture radar

Cited by 5 publications

References 0 publications

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

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

A design of a high‐resolution frequency modulated continuous wave radar for drone detection based on spurious phase noise and discrete clutter reduction

Extraction of Building Features from Stand-Off Measured Through-Wall Radar Data

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