An enhanced non-contact heart rate measurement in a 24GHz doppler radar system

Dianze Li; Qisong Wu; Po Li

doi:10.1117/12.2634689

4 May 2022 An enhanced non-contact heart rate measurement in a 24GHz doppler radar system

Dianze Li, Qisong Wu, Po Li

Proceedings Volume 12172, International Conference on Electronic Information Engineering and Computer Communication (EIECC 2021); 121721M (2022) https://doi.org/10.1117/12.2634689
Event: International Conference on Electronic Information Engineering and Computer Communication (EIECC 2021), 2021, Nanchang, China

Abstract

The technology of vital signs detection for the heart rate measurement using a Doppler radar system has been proven of great use, whereas it is still limited by several challenges. The major challenges are respiratory harmonic interference and random body movement (RBM), which significantly degrade the accuracy of measurement. In this paper, a novel vital signs detection method is proposed to acquire accurate heart rate measurement by jointly exploiting the respiratory harmonic cancellation method and regional hidden Markov model (RHMM) technique. The complex signal demodulation technique is firstly used to acquire an accurate respiratory rate estimation, and the respiration harmonic cancellation method is then introduced to address the harmonic interference. Finally, the RHMM technique is utilized to acquire robust and enhanced heart rate measurement by exploiting the underlying slowly-varying characteristics of the heartbeat signal to mitigate the effects of RBM. Experimental results based on a 24 GHz Doppler radar system show that the proposed method has a better performance than previous methods, whose average accuracy of the heart rate measurement reaches up to 94.5% in the RBM environment.

Citation Download Citation

Dianze Li, Qisong Wu, and Po Li "An enhanced non-contact heart rate measurement in a 24GHz doppler radar system", Proc. SPIE 12172, International Conference on Electronic Information Engineering and Computer Communication (EIECC 2021), 121721M (4 May 2022); https://doi.org/10.1117/12.2634689

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