title: Frequency-Tracking CW Doppler Radar Solving Small-Angle Approximation and Null Point Issues in Non-Contact Vital Signs Monitoring.
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.
authors.forename: Marco
authors.initials: M
authors.lastname: Mercuri
authors.forename: Yao-Hong
authors.initials: YH
authors.lastname: Liu
authors.forename: Ilde
authors.initials: I
authors.lastname: Lorato
authors.forename: Tom
authors.initials: T
authors.lastname: Torfs
authors.forename: Andre
authors.initials: A
authors.lastname: Bourdoux
authors.forename: Chris
authors.initials: C
authors.lastname: Van Hoof
mesh_terms: D004867:Equipment Design; D006801:Humans; D008991:Monitoring, Physiologic; D011825:Radar; D055986:Vital Signs