计算机科学与技术（PPT讲稿）QGesture - Quantifying Gesture Distance and Direction with WiFi Signals

Basic Ideas QGesture uses COTS WiFi devices to measure the movement distance and direction of human hands CSI values Target device WiFi signal Volume increase WiFi router QGesture system overview Motivation System design Experiments Conclusions 6/20

Basic Ideas QGesture uses COTS WiFi devices to measure the movement distance and direction of human hands QGesture system overview Motivation System design Experiments Conclusions 6/20

Denoising CSI Signals Noises in CSI Measurements: -CFO SFO PBD -Magnitude Variations Phase Correction: Phase of subcarrier 0 for each antenna pair only contains the phase of CFO and the impact of hand movements. Motivation System design Experiments Conclusions 7/20

Denoising CSI Signals Motivation System design Experiments Conclusions 7/20 ➢ Noises in CSI Measurements: —CFO —SFO & PBD —Magnitude Variations ➢ Phase Correction: — Phase of subcarrier 0 for each antenna pair only contains the phase of CFO and the impact of hand movements