Description
WiFi sensing is the umbrella term for inferring properties of the physical environment — presence, motion, identity, vital signs — from radio measurements taken on commodity Wi-Fi infrastructure. It contains both RSSI-based methods and the much richer CSI-based methods, and explicitly excludes systems that require dedicated radar hardware. The active corpus of this thesis treats WiFi sensing as the parent category; specific child methods (wifi-csi-sensing, device-free-localization, gesture-recognition, etc.) inherit from it.
When it's used
- Position papers, surveys, and broad framing claims
- Cross-cutting discussions of generalisation, domain shift, datasets
- Bridge between communication-layer and sensing-layer literature
Limitations
- Term is overloaded — some authors mean RSSI-only, others CSI-only
- Standardisation lags far behind research practice (until 802.11bf)