~/talk

CarOSense: Car Occupancy Sensing with the Ultra-Wideband Keyless Infrastructure

Talkat UbiComp / ISWC 2020 · 2020-09-12..09-17· [webxr, web-performance]
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CarOSense reuses the car’s UWB keyless infrastructure to sense per-seat occupancy by turning Channel Impulse Responses into a 4D tensor and feeding them to a deep multi-task CNN. The system instruments the cabin with 8 UWB nodes (Decawave DW1000 + STM32), aligns first-path taps, and trains a MaskMIMO multi-task mask model on data from 9 participants at 10 locations. It reports 94.6% leave-one-out accuracy and 87% under 10 unseen stress scenarios, runs on laptop, Google Coral and Raspberry Pi using TensorFlow Lite, and meets real-time constraints.

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