# Device-Free Human Activity Recognition Based on GMM-HMM Using Channel State Information

> Research article (IEEE Access, 2021) · cited 33× · AI/ML

**Wikidata**: [openalex:W3165714696](https://www.wikidata.org/wiki/openalex:W3165714696)  
**Source**: https://4ort.xyz/entity/device-free-human-activity-recognition-based-on-gmm-hmm-using-channel-state-information