A Doppler radar vital sign detection system using concurrent dual-band hybrid down conversion architecture

Liu, Wen-Kui; Fu, Haipeng; Yang, Zi-Kai

doi:10.1587/elex.16.20190665

Cited by 3 publications

(2 citation statements)

References 34 publications

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“…Many previous works have used radar to collect and process signals to extract vital signs information. From the perspective of digital signal processing, the time domain peak-detection algorithm has been applied for the acquisition of respiration and heart signals [3]- [5], to create the infection screening systems in diagnosing influenza [6]. An ultra-wide band (UWB) radarbased system was developed to cancel harmonics as well as interference [7]- [9].…”

Section: Introductionmentioning

confidence: 99%

Proof-of-principle Experiment on 24 GHz Medical Radar for Non-contact Vital Signs Measurement

Yen¹,

Kurosawa²,

Kirimoto³

et al. 2021

2021 43rd Annual International Conference of the IEEE Engineering in Medicine &Amp; Biology Society (EMBC)

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Medical radar for non-contact vital signs measurement exhibits great potential in both clinical and home healthcare settings. Especially during the corona virus spreading time, non-contact sensing more clearly shows the advantages. Many previous studies have concentrated on medical radar-based healthcare applications, but pay less attention to the working principles. A clear understanding of medical radars at both the mathematical and physical levels is critically important for developing application-specific signal processing algorithms. Therefore, this study aims to re-define the operating principle of radar, and a proof-of-principle experiment was performed on both actuator and human subjects using 24 GHz Doppler radar system. Experimental results indicate that there is a difference in the radar output signals between the two cases, where the displacement is greater than and less than half of the wavelength. For the former situation, the displacement x = n.λ/2 (n ≥ 1), one peak of radar signals corresponds to n peaks of baseband signals. By contrast, for the latter situation, the displacement x < λ/2, one peak of radar signals corresponds to one peak of baseband signals. Strikingly, with human measurement on the dorsal side, the the number of respiration peaks are seen from the radar raw signals.

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Section: Introductionmentioning

confidence: 99%

Proof-of-principle Experiment on 24 GHz Medical Radar for Non-contact Vital Signs Measurement

Yen¹,

Kurosawa²,

Kirimoto³

et al. 2021

2021 43rd Annual International Conference of the IEEE Engineering in Medicine &Amp; Biology Society (EMBC)

View full text Add to dashboard Cite

show abstract

“…Radio detection and ranging (RADAR) technology has been recently developed for healthcare [1,2,3,4,5,6,7,8,9], e.g., fall detection [10,11,12], heartbeat detection [13,14], etc. Account of Doppler effects, both range and velocity can be monitored with an employment of modulated continuous wave to perform satisfactorily in detecting human gestures [15,16,17,18,19]. However, it always suffers from some environmental clutters to extremely constrain its maximum operation distance [20,21,22,23].…”

Section: Introductionmentioning

confidence: 99%