Non-Contact Breathing Monitoring Using Sleep Breathing Detection Algorithm (SBDA) Based on UWB Radar Sensors

Ultra-wideband radar application for sleep breathing monitoring is hampered by the difficulty of obtaining breathing signals for non-stationary subjects. This occurs due to imprecise signal clutter removal and poor body movement removal algorithms for extracting accurate breathing signals. Therefore...

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Vydáno v:Sensors Ročník 22; číslo 14; s. 5249
Hlavní autoři: Husaini, Muhammad, Kamarudin, Latifah Munirah, Zakaria, Ammar, Kamarudin, Intan Kartika, Ibrahim, Muhammad Amin, Nishizaki, Hiromitsu, Toyoura, Masahiro, Mao, Xiaoyang
Médium: Journal Article
Jazyk:angličtina
Vydáno: Basel MDPI AG 13.07.2022
MDPI
Témata:
Acoustics
Airway management
Algorithms
breathing rate (BR)
breathing rate (BR); sleeping monitoring; contactless sensing; polysomnography (PSG); ultra-wideband (UWB) radar
Chemical technology
contactless sensing
Heart Rate
Humans
Intensive care
Medical research
Patients
Polysomnography
polysomnography (PSG)
Radar
Radio equipment
Respiration
Sensors
Signal processing
Signal Processing, Computer-Assisted
Sleep
sleeping monitoring
TP1-1185
ultra-wideband (UWB) radar
ISSN:1424-8220, 1424-8220
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Shrnutí:Ultra-wideband radar application for sleep breathing monitoring is hampered by the difficulty of obtaining breathing signals for non-stationary subjects. This occurs due to imprecise signal clutter removal and poor body movement removal algorithms for extracting accurate breathing signals. Therefore, this paper proposed a Sleep Breathing Detection Algorithm (SBDA) to address this challenge. First, SBDA introduces the combination of variance feature with Discrete Wavelet Transform (DWT) to tackle the issue of clutter signals. This method used Daubechies wavelets with five levels of decomposition to satisfy the signal-to-noise ratio in the signal. Second, SBDA implements a curve fit based sinusoidal pattern algorithm for detecting periodic motion. The measurement was taken by comparing the R-square value to differentiate between chest and body movements. Last but not least, SBDA applied the Ensemble Empirical Mode Decomposition (EEMD) method for extracting breathing signals before transforming the signal to the frequency domain using Fast Fourier Transform (FFT) to obtain breathing rate. The analysis was conducted on 15 subjects with normal and abnormal ratings for sleep monitoring. All results were compared with two existing methods obtained from previous literature with Polysomnography (PSG) devices. The result found that SBDA effectively monitors breathing using IR-UWB as it has the lowest average percentage error with only 6.12% compared to the other two existing methods from past research implemented in this dataset.
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ISSN:1424-8220
1424-8220
DOI:10.3390/s22145249