Through-the-wall sensing refers to the use of wireless signals, particularly Wi-Fi-based Channel State Information (CSI), to detect and recognize human presence, movement, or behavior from behind physical barriers such as walls or other obstructions, without requiring line-of-sight between the transmitter, receiver, and subject. This capability is significant for the field because it enables non-invasive, privacy-preserving monitoring in scenarios where direct observation is impractical, extending the applicability of CSI-based systems to security surveillance, search-and-rescue operations, and smart-home occupancy detection. Key variants include passive through-the-wall sensing, where existing Wi-Fi infrastructure is leveraged without dedicated hardware, and active approaches that employ purpose-built transceivers to improve signal penetration and detection accuracy across different wall materials and thicknesses.
Source Papers
- A Survey on Human Behavior Recognition Using Channel State Information ↗ — A Survey on Human Behavior Recognition Using Channel State I
- An Overview on IEEE 802.11bf: WLAN Sensing ↗ — An Overview on IEEE 802.11bf: WLAN Sensing
- Channel State Information (CSI) Amplitude Coloring Scheme for Enhancing Accuracy of an Indoor Occupancy Detection System Using Wi-Fi Sensing ↗ — Channel State Information (CSI) Amplitude Coloring Scheme fo
- Channel State Information from Pure Communication to Sense and Track Human Motion: A Survey ↗ — Channel State Information from Pure Communication to Sense a
- Deep Learning-Enhanced Human Sensing with Channel State Information: A Survey ↗ — Deep Learning-Enhanced Human Sensing with Channel State Info
- Passive WiFi Radar for Human Sensing Using a Stand-Alone Access Point ↗ — Passive WiFi Radar for Human Sensing Using a Stand-Alone Acc