Motion-tolerant non-contact heart-rate measurements from radar sensor fusion

Yu Rong, Arindam Dutta, Alex Chiriyath, Daniel W. Bliss

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Microwave radar technology is very attractive for ubiquitous short-range health monitoring due to its non-contact, see-through, privacy-preserving and safe features compared to the competing remote technologies such as optics. The possibility of radar-based approaches for breathing and cardiac sensing was demonstrated a few decades ago. However, investigation regarding the robustness of radar-based vital-sign monitoring (VSM) is not available in the current radar literature. In this paper, we aim to close this gap by presenting an extensive experimental study of vital-sign radar approach. We consider diversity in test subjects, fitness levels, poses/postures, and, more importantly, random body movement (RBM) in the study. We discuss some new insights that lead to robust radar heart-rate (HR) measurements. A novel active motion cancellation signal-processing technique is introduced, exploiting dual ultra-wideband (UWB) radar system for motion-tolerant HR measurements. Additionally, we propose a spectral pruning routine to enhance HR estimation performance. We validate the proposed method theoretically and experimentally. Totally, we record and analyze about 3500 seconds of radar measurements from multiple human subjects.

Original languageEnglish (US)
Article number1774
Pages (from-to)1-17
Number of pages17
JournalSensors
Volume21
Issue number5
DOIs
StatePublished - Mar 1 2021

Keywords

  • Privacy preserving
  • Radar
  • Random body movement cancellation
  • UWB
  • Vital signs

ASJC Scopus subject areas

  • Analytical Chemistry
  • Information Systems
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering

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