LiveSense Turns Laptops into Real-Time Wi-Fi Range-Doppler Sensors
Researchers have unveiled LiveSense, a groundbreaking system that transforms standard Wi-Fi Network Interface Cards (NICs) in laptops into highly precise Range-Doppler sensors, all while allowing for ongoing communication. This technology works with Intel AX211 (Wi-Fi 6E) and Intel BE201 (Wi-Fi 7) NICs. LiveSense can gather synchronized channel state information (CSI) at speeds of 40 Hz or more and includes features like on-device time-phase alignment and self-interference cancellation. It provides a real-time output of distance, velocity, subcarrier magnitude and phase, along with video frames to a Python/Qt GUI. The demo showcases its ability to measure distances and detect subtle movements, marking a significant advancement in range data acquisition.
Key facts
- LiveSense transforms COTS Wi-Fi NICs into Range-Doppler sensors.
- Works with Intel AX211 (Wi-Fi 6E) and Intel BE201 (Wi-Fi 7) NICs.
- Extracts CSI at ≥40 Hz.
- Performs on-device time-phase alignment and self-interference cancellation.
- Provides real-time stream of range, Doppler, subcarrier magnitude/phase, and annotated video frames.
- Detects distance and radial velocity of attendees within a few meters.
- Detects micro-motion (respiration) and hand-gesture ranging.
- Claimed as first-ever demo to obtain accurate range information.
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