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Radar-Based Heart Cardiac Activity Measurements: A Review.

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  • 1Department of Electronics Telecommunications and Informatics (DETI), Instituto de Telecomunicações, Universidade de Aveiro, 3810-193 Aveiro, Portugal.

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|December 17, 2024
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Summary

Contactless vital sign monitoring using Doppler radar systems is advancing. System architecture and signal processing significantly impact heart rate and heart rate variability measurements, enabling simpler, lower-frequency designs.

Keywords:
CWDoppler radarFMCWHRVUWBremote vital signs

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Area of Science:

  • Biomedical Engineering
  • Smart Home Technology
  • Remote Patient Monitoring

Background:

  • Rising demand for contactless vital sign measurement systems, driven by smart home technology interest and pandemic-related remote patient monitoring needs.
  • Doppler radar systems offer a promising contactless solution for vital sign acquisition, particularly for cardiac activity.

Purpose of the Study:

  • To review and analyze the impact of design choices on the performance of Doppler radar systems for measuring heart rate (HR) and heart rate variability (HRV).
  • To identify key factors influencing the effectiveness of radar-based cardiac monitoring.

Main Methods:

  • Systematic literature review of relevant scientific databases focusing on Doppler radar systems for cardiac parameter measurement.
  • Analysis of system performance based on hardware architecture (e.g., FMCW), carrier frequency, and measurement distance.
  • Discussion of signal processing trends and their influence on measurement accuracy.

Main Results:

  • System architecture and signal processing algorithms were identified as the most critical factors affecting performance in HR and HRV measurement.
  • Frequency Modulated Continuous Wave (FMCW) architecture demonstrated superior performance.
  • Carrier frequency and measurement distance showed less significant impact on overall system performance.

Conclusions:

  • Future Doppler radar systems for contactless vital sign monitoring can prioritize cost-effective, lower-frequency designs without compromising performance.
  • Emphasis on optimizing system architecture and advanced signal processing algorithms will drive advancements in radar-based cardiac monitoring.