# Noncontact Vital Sign Sensing Under Nonperiodic Body Movement Using a Novel Frequency-Locked-Loop Radar

> Research article (IEEE Transactions on Microwave Theory and Techniques, 2021) · cited 29× · AI/ML

**Wikidata**: [openalex:W3197873123](https://www.wikidata.org/wiki/openalex:W3197873123)  
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