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 language | English |
|---|---|
| Article number | 7888984 |
| Pages (from-to) | 671-680 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Biomedical Circuits and Systems |
| Volume | 11 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Jun 2017 |
| Externally published | Yes |
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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Cite this
Mercuri, M., Liu, Y. H., Lorato, I., Torfs, T., Bourdoux, A., & van Hoof, C. (2017). Frequency-tracking CW doppler radar solving small-angle approximation and null point issues in non-contact vital signs monitoring. IEEE Transactions on Biomedical Circuits and Systems, 11(3), 671-680. [7888984]. https://doi.org/10.1109/TBCAS.2016.2647560