A Hybrid FMCW-Interferometry Radar for Indoor Precise Positioning and Versatile Life Activity Monitoring

Wang, Guochao; Gu, Changzhan; Inoue, Takao; Li, Changzhi

doi:10.1109/tmtt.2014.2358572

Cited by 252 publications

(120 citation statements)

References 23 publications

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“…The power spectral density (PSD) of BB noise, caused by LO phase-noise for in-phase (I) and quadrature (Q) components, takes its form according to (7) and (8), respectively: …”

Section: Phase Noisementioning

confidence: 99%

“…Above all, this concerns basic CW, frequency-modulated CW (FM-CW), step-frequency CW (SF-CW), or pseudo-noise CW (PN-CW) devices. Their popularity is due to their relative simplicity and the capability of being used as small sensors in many applications (automotive [1][2][3][4], medical [5], [6], human detection and rescue [7], [8], others [9]). Nowadays, probably the most important field is the automobile industry where FM-CW units are widely used as low-to mid-range radar sensors.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Extended Noise Analysis Model of CW-type Radar Sensors with IQ Down-Conversion

Hudec¹,

Jeník²,

Panek³

2018

RADIOENGINEERING

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“…The power spectral density (PSD) of BB noise, caused by LO phase-noise for in-phase (I) and quadrature (Q) components, takes its form according to (7) and (8), respectively: …”

Section: Phase Noisementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Extended Noise Analysis Model of CW-type Radar Sensors with IQ Down-Conversion

Hudec¹,

Jeník²,

Panek³

2018

RADIOENGINEERING

View full text Add to dashboard Cite

“…Ultra-wide band (UWB) impulse radar has been widely applied in indoor target localization, VS detection, and human fall detection by employing the continuous wave [5][6][7][8]. As a better alternative, UWB pulse radar has been widely used in moving target detection [3,9,10], through-wall imaging [11,12] and post-earthquake search and rescue [13][14][15] due to its insightful advantages such as strong permeability and excellent time resolution.…”

Section: Introductionmentioning

confidence: 99%

`Through-wall human being detection using UWB impulse radar

Liang

Zhang

et al. 2018

J Wireless Com Network

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Ultra-wideband (UWB) impulse radar plays an important role in contactless vital sign (VS) detection. The VS can be extracted remotely by acquiring the oscillations in the human chest. Unfortunately, it is usually challenging to identify VS due to the low signal-to-noise ratio (SNR) only based on the traditional fast Fourier transform (FFT) especially in complicated conditions. To extract VS accurately, this paper presents a new scheme by analyzing the skewness characteristic of the received UWB impulses, which are modulated by life activities. The distance from the human subject to the radar antenna can be calculated by performing the discrete short-time Fourier transform (DSFT) on skewness. The frequency of human respiratory movement can be estimated based on the developed ensemble empirical mode decomposition (EEMD)-based accumulation technique by canceling out the harmonics effectively. The performance of the developed detection method is tested with several experiments carried out in different environments.

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“…In [14], UWB impulse radar was used to monitor the breathing rates of two subjects through a cement wall. Wang et al [15] proposed a logarithmic method (LM) utilizing the phase variation of the reflected pulses caused by the periodic thorax displacements to monitor multiple subjects at low power consumption. The stepped frequency continuous wave (SFCW) is a new form of UWB radar waveform, which transmits a series of discrete frequencies in a stepwise manner, covering the radar bandwidth in the time domain to realize the UWB.…”

Section: Introductionmentioning

confidence: 99%

Detection of Multiple Stationary Humans Using UWB MIMO Radar

Liang

et al. 2016

Sensors

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Remarkable progress has been achieved in the detection of single stationary human. However, restricted by the mutual interference of multiple humans (e.g., strong sidelobes of the torsos and the shadow effect), detection and localization of the multiple stationary humans remains a huge challenge. In this paper, ultra-wideband (UWB) multiple-input and multiple-output (MIMO) radar is exploited to improve the detection performance of multiple stationary humans for its multiple sight angles and high-resolution two-dimensional imaging capacity. A signal model of the vital sign considering both bi-static angles and attitude angle of the human body is firstly developed, and then a novel detection method is proposed to detect and localize multiple stationary humans. In this method, preprocessing is firstly implemented to improve the signal-to-noise ratio (SNR) of the vital signs, and then a vital-sign-enhanced imaging algorithm is presented to suppress the environmental clutters and mutual affection of multiple humans. Finally, an automatic detection algorithm including constant false alarm rate (CFAR), morphological filtering and clustering is implemented to improve the detection performance of weak human targets affected by heavy clutters and shadow effect. The simulation and experimental results show that the proposed method can get a high-quality image of multiple humans and we can use it to discriminate and localize multiple adjacent human targets behind brick walls.

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A Hybrid FMCW-Interferometry Radar for Indoor Precise Positioning and Versatile Life Activity Monitoring

Cited by 252 publications

References 23 publications

Extended Noise Analysis Model of CW-type Radar Sensors with IQ Down-Conversion

Extended Noise Analysis Model of CW-type Radar Sensors with IQ Down-Conversion

`Through-wall human being detection using UWB impulse radar

Detection of Multiple Stationary Humans Using UWB MIMO Radar

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