Frequency-tracking CW doppler radar solving small-angle approximation and null point issues in non-contact vital signs monitoring

Marco Mercuri, Yao Hong Liu, Ilde Lorato, Tom Torfs, Andre Bourdoux, Chris van Hoof

Research output: Contribution to journalArticleAcademicpeer-review

18 Citations (Scopus)

Abstract

A Doppler radar operating as a Phase-Locked-Loop (PLL) in frequency demodulator configuration is presented and discussed. The proposed radar presents a unique architecture, using a single channel mixer, and allows to detect contactless vital signs parameters while solving the null point issue and without requiring the small angle approximation condition. Spectral analysis, simulations, and experimental results are presented and detailed to demonstrate the feasibility and the operational principle of the proposed radar architecture.

Original languageEnglish
Article number7888984
Pages (from-to)671-680
Number of pages10
JournalIEEE Transactions on Biomedical Circuits and Systems
Volume11
Issue number3
DOIs
Publication statusPublished - 1 Jun 2017
Externally publishedYes

Keywords

  • DC offset
  • Doppler radar
  • non-contact sensing
  • null-point elimination
  • phase-locked loop
  • RF-based sensing
  • small-angle approximation
  • vital signs monitoring

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