&lt;title&gt;Concealed explosive detection on personnel using a wideband holographic millimeter-wave imaging system&lt;/title&gt;

Abstract-Fourier-based methods for monostatic and bistatic setups have been widely used for high-accuracy radar imaging. However, the multistatic configuration has several characteristics that make Fourier processing more challenging: 1) a nonuniform grid in -space, which requires multidimensional interpolation methods, and 2) image distortion when the incident spherical wave is approximated by a plane wave. This contribution presents a Fourier-based imaging method for multistatic systems, solving the aforementioned limitations: the first, by using -space partitioning and applying interpolation in each domain; the second, by approximating the spherical wave with multiple plane waves.

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“…Formulations for planar and cylindrical imaging systems, devoted for whole human body imaging, have been presented in [3], [13], and [14].…”

mentioning

confidence: 99%

Fourier-Based Imaging for Multistatic Radar Systems

Álvarez

Rodríguez-Vaqueiro

González-Valdés

et al. 2014

IEEE Trans. Microwave Theory Techn.

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“…The rectilinear and cylindrical 3-D imaging techniques for concealed weapon detection were described along with several application results in [3,[13][14][15][16][17]. Wavenumber domain algorithms (or called range migration algorithms, abbreviated to RMA) [1,13,20] have been widely used in rectilinear 2-D and 3-D imaging system.…”

Section: Introductionmentioning

confidence: 99%

“…Cylindrical 3-D imaging technique is an extension of rectilinear imaging technique. A cylindrical holographic algorithm was first developed by Soumekh [18,19] and was used for security imaging by Sheen et al [15]. A 3-D RMA was developed for cylindrical geometries by backpropagating the backscattered data onto a planar aperture in [21].…”

Section: Introductionmentioning

confidence: 99%

Modified Cylindrical Holographic Algorithm for Three-Dimensional Millimeter-Wave Imaging

Ren¹,

Li²,

Sun³

et al. 2012

PIER

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Abstract-Millimeter-wave (MMW) imaging techniques have been developed for the detection of concealed weapons and plastic explosives carried on personnel at major transportation hubs and secure locations. The combination of frequency-modulated continuous-wave (FMCW) technology and MMW imaging techniques leads to wideband, compact, and cost-effective systems which are especially suitable for security detection. Cylindrical three-dimensional (3-D) imaging technique, with the ability of viewing multiple sides, is an extension of rectilinear 3-D imaging technique only viewing a single side. Due to the relatively long signal sweep time, the conventional stop-and-go approximation of the pulsed systems is not suitable for FMCW systems. Therefore, a 3-D backscattered signal model including the effects of the continuous motion within the signal duration time is developed for cylindrical imaging systems. Then, a holographic image reconstruction algorithm, with motion compensation, is presented and demonstrated by means of numerical simulations.

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“…The 3-D MMW imaging techniques for concealed weapon detection were discussed in [1,[11][12][13][14], etc., whereas the effects of the continuous motion of the array on the transmitted and echoed signal were not addressed. In this paper, we begin with an analysis of the 3-D signal model which accurately includes the effects of the continuous motion of the array on the transmitted and received signal during the pulse time.…”

Section: Introductionmentioning

confidence: 99%

Modified Wavenumber Domain Algorithm for Three-Dimensional Millimeter-Wave Imaging

Li¹,

Ren²,

Sun³

et al. 2012

PIER

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Abstract-Millimeter-wave (MMW) imaging techniques have been used for the detection of concealed weapons and contraband carried on personnel at airports and other secure locations. The combination of frequency-modulated continuous-wave (FMCW) technology and MMW imaging techniques should lead to compact, light-weight, and low-cost systems which are especially suitable for security and detection application.However, the long signal duration time leads to the failure of the conventional stop-and-go approximation of the pulsed system. Therefore, the motion within the signal duration time needs to be taken into account. Analytical threedimensional (3-D) backscattered signal model, without using the stop-and-go approximation, is developed in this paper.Then, a wavenumber domain algorithm, with motion compensation, is presented. In addition, conventional wavenumber domain methods use Stolt interpolation to obtain uniform wavenumber samples and compute the fast Fourier transform (FFT). This paper uses the 3-D nonuniform fast Fourier transform (NUFFT) instead of the Stolt interpolation and FFT. The NUFFT-based method is much faster than the Stolt interpolation-based method. Finally, point target simulations are performed to verify the algorithm.

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<title>Concealed explosive detection on personnel using a wideband holographic millimeter-wave imaging system</title>

Cited by 56 publications

References 4 publications

Fourier-Based Imaging for Multistatic Radar Systems

Fourier-Based Imaging for Multistatic Radar Systems

Modified Cylindrical Holographic Algorithm for Three-Dimensional Millimeter-Wave Imaging

Modified Wavenumber Domain Algorithm for Three-Dimensional Millimeter-Wave Imaging

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