NFCGest: Gesture Interaction with NFC terminal Enabled by Super High Speed ADC
summary
Custom streaming ADC on an STM32 microcontroller reads I/Q RX analog outputs from a PN532 NFC terminal at ~848 kHz, streams amplitude–phase trajectories, and classifies nine card gestures (tap, double tap, slide, swipe in four directions, rub, shake). Asymmetric interference coils break antenna symmetry to encode direction. Ten-participant evaluation yields cross-user accuracy ~91.8% with a 14-dim feature vector and a random forest. Demonstrations show display and display-less terminals handling contactless selection, passcodes, and continuous slide input. streaming ADC, I/Q trajectories, asymmetric coils
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chapters (10)
- 0:00Introduction and motivation
- 1:06Limitations of existing NFC interaction
- 2:51Raw signal analysis for gestures
- 4:38Custom streaming ADC system
- 6:28Enhancing gesture detection with coils
- 7:54Feature extraction and gesture classification
- 8:34Evaluation and accuracy results
- 9:19Application demonstrations
- 10:44Future improvements and challenges
- 11:46Conclusion and Q&A
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