Motion Compensation Method Based on MFDF of Moving Target for UWB MIMO Through-Wall Radar System

Pan, Jun; Ni, Zhi-Kang; Shi, Cheng; Zheng, Zhijie; Ye, Shengbo; Fang, Guangyou

doi:10.1109/lgrs.2021.3116766

Cited by 7 publications

(8 citation statements)

References 10 publications

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“…The reflection affects the time delay duration that brings errors in the imaging results. 28,29 The speed of propagation within a wall is denoted by v, expressed as v c ε = / w , where ε w is the dielectric constant of the wall. The time delay from the transmitter to the measured object can be extrapolated into…”

Section: Principle Of the Bp Algorithmmentioning

confidence: 99%

“…Faster detection [28] Motion compensation Focus image [40] Ringing suppression Reduction of ghosting This work Anti-attenuation backward projection (AA-BP)…”

Section: Experiments In Multiple Path Environmentmentioning

confidence: 99%

“…When penetrating walls for radar imaging, the EM wave propagation path is refracted due to the dielectric constant and losses which creates a multipath reflection problem. The reflection affects the time delay duration that brings errors in the imaging results 28,29 . The speed of propagation within a wall is denoted by

v

, expressed as

v=c/\sqrt{{\varepsilon }_{{\rm{w}}}}

, where

{\varepsilon }_{{\rm{w}}}

is the dielectric constant of the wall.…”

Section: Imaging Algorithmmentioning

confidence: 99%

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Ultra‐wideband imaging with an improved backward projection algorithm for far‐field applications

Xu,

Fan,

et al. 2024

Micro & Optical Tech Letters

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Ultra‐wideband (UWB) radar imaging is widely used in penetration detection, target location and detection, and vital monitoring because of its high interference immunity and excellent target recognition with high resolution. In this paper, we report the design of a UWB stepper radar imaging system by using a vector network analyzer and a specially designed novel Vivaldi antenna for far‐field imaging applications. An anti‐attenuation backward projection (AA‐BP) algorithm is proposed to alleviate the attenuation impact of electromagnetic wave propagation. The AA‐BP algorithm and the specially designed Vivaldi antenna are jointly applied in our experiments on multiple targets through wall imaging in both free space and multiple‐path propagation environments. The experimental results show that our reported imaging system achieves desirable performances of far‐field imaging.

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Section: Principle Of the Bp Algorithmmentioning

confidence: 99%

“…Faster detection [28] Motion compensation Focus image [40] Ringing suppression Reduction of ghosting This work Anti-attenuation backward projection (AA-BP)…”

Section: Experiments In Multiple Path Environmentmentioning

confidence: 99%

v

, expressed as

v=c/\sqrt{{\varepsilon }_{{\rm{w}}}}

, where

{\varepsilon }_{{\rm{w}}}

is the dielectric constant of the wall.…”

Section: Imaging Algorithmmentioning

confidence: 99%

See 1 more Smart Citation

Ultra‐wideband imaging with an improved backward projection algorithm for far‐field applications

Xu,

Fan,

et al. 2024

Micro & Optical Tech Letters

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show abstract

“…Among many wireless communication technologies, ultra‐wideband (UWB) technology is used in numerous detection applications, including through‐wall radar, 1 ground‐penetrating radar, 2 and tumor detection, 3 due to its advantages of large signal bandwidth, low power consumption, strong anti‐interference, low equipment cost, and minimal harm to objects as described in Oppermann et al 4 and Huda et al 5 As an important part of the UWB detection systems, the performance of the antenna affects the detection effectiveness. The Vivaldi antenna (VA) is commonly utilized in UWB detection and imaging systems due to its powerful directional radiation and excellent signal interference immunity.…”

Section: Introductionmentioning

confidence: 99%

An improved gain and directivity design of an antipodal Vivaldi antenna for ultra‐wideband detection

Wang,

Li,

Liu

et al. 2024

Micro & Optical Tech Letters

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A novel antipodal Vivaldi antenna (AVA) is proposed to achieve improved gain and directivity. To enhance the bandwidth of the antenna, a series of equal‐sized slots are etched onto the patch surface. Additionally, a dielectric lens with a fan‐shaped structure is integrated along the patch openings to boost gain. The length of the lens which will affect the radiation characteristics of the antenna in the end‐fire direction will be discussed. Furthermore, three arrays of directors are added to enhance the directivity. The fabricated antenna is then measured using a vector network analyzer in a microwave chamber to assess its performance. The results indicate that the antenna's minimum operating frequency is reduced by 0.5 GHz after etching the slots. Besides, the average gain is improved by 1 dBi after installing the fan‐shaped expansion structure. By introducing the directors, the sidelobe levels decrease and the 3 dB Half‐Power Beamwidth becomes sharper. Finally, an ultra‐wideband (UWB) detection experiment is designed to analyze the detection capability of the fabricated antennas. The results demonstrate that the antenna is well‐suited for UWB applications.

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“…The driver's movement causes irregular fluctuations in the radar signal [15], which reduces the accuracy of vital signal monitoring through the FMCW radar [16]. Therefore, it is necessary to compensate for the respiration signal reflecting the movement of the driver in the movement situation to improve the accuracy of signal extraction [17,18].…”

Section: Introductionmentioning

confidence: 99%

Movement Compensated Driver’s Respiratory Rate Extraction

Yoo

Shin

2022

Applied Sciences

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In non-contact vital sign monitoring using radar, radar signal distorted by the surrounding unspecified factors is unsuitable for monitoring vital signs. In order to monitor vital signs accurately, it is essential to compensate for distortion of radar signals caused by surrounding environmental factors. In this paper, we propose a driver vital signal compensation method in driving situations, including the driver’s movements using a frequency-modulated continuous-wave (FMCW) radar. Driver’s movement is quantified from the radar signal and used to set a distortion signal compensation index to compensate for the signal distortion induced in the driving situation that the driver’s movement occurs. The experimental results show that the respiration rate estimated from the radar signal compensated through the proposed method is similar to the actual respiration rate than from the signal before calibration. These results confirm the possibility of using the proposed method in a non-statistic situation and effectiveness in estimating respiration rate reflecting human movement in monitoring vital signs using FMCW radar.

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Motion Compensation Method Based on MFDF of Moving Target for UWB MIMO Through-Wall Radar System

Cited by 7 publications

References 10 publications

Ultra‐wideband imaging with an improved backward projection algorithm for far‐field applications

Ultra‐wideband imaging with an improved backward projection algorithm for far‐field applications

An improved gain and directivity design of an antipodal Vivaldi antenna for ultra‐wideband detection

Movement Compensated Driver’s Respiratory Rate Extraction

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