Key result
A novel heart rate monitoring algorithm based on frequency-modulated continuous-wave radar estimated heart rate with a mean absolute error of less than 4 BPM.
Why the study?
The study was conducted to reduce the effects of random body motion, respiration, and respiratory harmonics on non-contact heart rate estimation using frequency-modulated continuous-wave millimeter wave radar.
Does FMCW radar with ANF and EWT accurately estimate heart rate in human subjects?
Does FMCW radar with ANF and EWT accurately estimate heart rate in human subjects?
A novel FMCW radar-based algorithm using ANF and EWT can accurately estimate heart rate with a mean absolute error of less than 4 BPM, offering a potential non-contact monitoring solution.
Answers are grounded in this paper and cite their sources.
May enable contactless monitoring; leaves open prospective clinical validation before adoption.
Millimeter Wave(mmWave) radar has been widely used in vital sign monitoring with non-contact and privacy protection. To reduce the effect of random body motion, respiration, and its harmonics on heart rate estimation, the heart rate monitoring based on frequency-modulated continuous-wave (FMCW) radar is researched in this paper. First, a vital sign signal extraction algorithm is designed for the Range Bin variation caused by random body motion and heavy breathing. Second, a heartbeat signal extraction algorithm is designed based on Adaptive Notch Filter (ANF) and Empirical Wavelet Transform (EWT). The harmonic of respiration will be suppressed, and the heartbeat signal will be separated. Finally, the weighted estimation is performed according to the relationship of harmonics of the heartbeat signal to obtain the heart rate. Twenty subjects are invited to the experiment. The experimental results show that the proposed method can improve the signal-to-noise ratio (SNR), reduce the harmonic interference, and estimate the heart rate with a mean absolute error less than 4BPM.
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Ling et al. (2022) studied this question. Heart rate monitoring based on frequency-modulated continuous-wave (FMCW) radar was evaluated on Heart rate estimation accuracy (mean absolute error). A novel heart rate monitoring algorithm based on frequency-modulated continuous-wave radar estimated heart rate with a mean absolute error of less than 4 BPM.
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