A Survey of Handy See-Through Wall Technology

Mu, Phil K.; Luan, Tom H.; Zhu, Liehuang; Cai, Lin X.; Gao, Longxiang

doi:10.1109/access.2020.2991201

Cited by 19 publications

(7 citation statements)

References 54 publications

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“…There are many location algorithms based on radio, such as direction of arrival (AOA), received signal strength indicator (RSSI), time difference of arrival (TDOA), and time of arrival (TOA). In this section, we introduce the ellipse cross positioning algorithm based on TOA, which is commonly used in IR-UWB through-wall radar [ 54 ]. This algorithm only requires the time delay information of targets, allowing it to fully use the extremely fine time resolution of the UWB signal.…”

Section: Obtaining Human Informationmentioning

confidence: 99%

The Overview of Human Localization and Vital Sign Signal Measurement Using Handheld IR-UWB Through-Wall Radar

Yang

Zhu

Zhang

et al. 2021

Sensors

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Obtaining information (e.g., position, respiration, and heartbeat rates) on humans located behind opaque and non-metallic obstacles (e.g., walls and wood) has prompted the development of non-invasive remote sensing technologies. Due to its excellent features like high penetration ability, short blind area, fine-range resolution, high environment adoption capabilities, low cost and power consumption, and simple hardware design, impulse radio ultra-wideband (IR-UWB) through-wall radar has become the mainstream primary application radar used for the non-invasive remote sensing. IR-UWB through-wall radar has been developed for nearly 40 years, and various hardware compositions, deployment methods, and signal processing algorithms have been introduced by many scholars. The purpose of these proposed approaches is to obtain human information more accurately and quickly. In this paper, we focus on IR-UWB through-wall radar and introduce the key advances in system design and deployment, human detection theory, and signal processing algorithms, such as human vital sign signal measurement methods and moving human localization. Meanwhile, we discuss the engineering pre-processing methods of IR-UWB through-wall radar. The lasts research progress in the field is also presented. Based on this progress, the conclusions and the development directions of the IR-UWB through-wall radar in the future are also preliminarily forecasted.

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Section: Obtaining Human Informationmentioning

confidence: 99%

The Overview of Human Localization and Vital Sign Signal Measurement Using Handheld IR-UWB Through-Wall Radar

Yang

Zhu

Zhang

et al. 2021

Sensors

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“…The GNU Radio Companion is a collection of signal-processing blocks used for radio-frequency applications that can be reviewed in real time [ 33 ]. The GNU Radio Companion can act as an independent software package or as a back end to hardware devices.…”

Section: System Designmentioning

confidence: 99%

“…The use of Doppler radar for the detection of the breathing rate has contributed to a variety of research projects since 1975. Not only for direct static uses, the technique was also extended to a larger range of applications, such as the discovery of victims of falling building debris and human identification behind walls [ 30 , 31 , 32 , 33 ]. A technique using a string to measure chest expansion was introduced in [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

Portable Micro-Doppler Radar with Quadrature Radar Architecture for Non-Contact Human Breath Detection

Apriono

Muin

Juwono

2021

Sensors

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Recently, rapid advances in radio detection and ranging (radar) technology applications have been implemented in various fields. In particular, micro-Doppler radar has been widely developed to perform certain tasks, such as detection of buried victims in natural disaster, drone system detection, and classification of humans and animals. Further, micro-Doppler radar can also be implemented in medical applications for remote monitoring and examination. This paper proposes a human respiration rate detection system using micro-Doppler radar with quadrature architecture in the industrial, scientific, and medical (ISM) frequency of 5.8 GHz. We use a mathematical model of human breathing to further explore any insights into signal processes in the radar. The experimental system is designed using the USRP B200 mini-module as the main component of the radar and the Vivaldi antennas working at 5.8 GHz. The radar system is integrated directly with the GNU Radio Companion software as the processing part. Using a frequency of 5.8 GHz and USRP output power of 0.33 mW, our proposed method was able to detect the respiration rate at a distance of 2 m or less with acceptable error. In addition, the radar system could differentiate different frequency rates for different targets, demonstrating that it is highly sensitive. We also emphasize that the designed radar system can be used as a portable device which offers flexibility to be used anytime and anywhere.

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“…Mobile and satellite communication systems [1]- [3] weather radars [4], RF sensing [5], [6], and through-thewall imaging (TWI) systems [7]- [9], as well as compact antenna test ranges [10] can benefit from the use of antennas featuring performance-enhancing dielectric lenses. These lenses can be designed to increase gain and front-toback ratio, equalizing these parameters within the antenna operating band, thus achieving compact size and light weight of the resulting radiating system.…”

Section: Introductionmentioning

confidence: 99%

A Class of Lightweight Spherical-Axicon Dielectric Lenses for High Gain Wideband Antennas

Cicchetti

Faraone

et al. 2021

IEEE Access

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A class of lightweight spherical-axicon-like dielectric lenses suitable for enhancing broadband antennas performances is presented. The proposed lenses, sized according to a reference massive lens, are formed by thin dielectric sheets spaced equiangularly on the azimuth plane (petal-shaped lens), or regularly orthogonally arranged along the lens axis (disks-shaped lens), thus yielding construction simplicity and significant weight reduction. While petal-shaped dielectric lenses are shown to yield mild gain increase, lenses made by thin dielectric disks, orthogonally periodically arranged along the lens optical axis, offer performances much closer to those achieved by comparable massive refractive spherical-axicon dielectric lenses. The time-domain and the focusing characteristics of the proposed lenses are investigated. Then, a Floquet's mode-based model is proposed to describe the stop-band characteristics of stacked-disk lenses, illustrating the mechanism underpinning their sudden performance degradation observed at the stopband onset frequency. Full-wave analyses, based on a locally conformal finite integration technique (FIT), implemented in CST Studio Suite™ and validated by measurements or highly accurate FEM simulations, illustrate the excellent characteristics of the proposed lenses to operate with narrowband as well as ultrawideband (UWB) waveforms.INDEX TERMS Dielectric resonator antennas (DRA), high gain wideband antenna, petal-shaped dielectric lens, spherical-axicon dielectric lens, stacked-disk dielectric lens, traveling-wave antennas, Vivaldi antenna, wideband dielectric lens.

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A Survey of Handy See-Through Wall Technology

Cited by 19 publications

References 54 publications

The Overview of Human Localization and Vital Sign Signal Measurement Using Handheld IR-UWB Through-Wall Radar

The Overview of Human Localization and Vital Sign Signal Measurement Using Handheld IR-UWB Through-Wall Radar

Portable Micro-Doppler Radar with Quadrature Radar Architecture for Non-Contact Human Breath Detection

A Class of Lightweight Spherical-Axicon Dielectric Lenses for High Gain Wideband Antennas

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