Corona: Positioning Adjacent Device with Asymmetric Bluetooth Low Energy RSSI ...
summary
Corona uses off-center BLE antenna radio asymmetry to infer the relative position of an adjacent device on the same plane, implemented on stock iPhone and iPad Mini with no hardware mods. The system collects ~200k RSSI samples (45 Hz per device, ~90 Hz combined), models 16 discrete positions × 4 orientations, and predicts location with 50% within 2 cm for top-1 and roughly ~90% for top-2 candidates. An app fuses BLE with compass/gyro/accelerometer to resolve ambiguities; Wi‑Fi sharing the radio is a noted interference source.
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chapters (9)
- 0:00Introduction to Corona
- 1:51Asymmetric RSSI phenomenon
- 3:18Demo and real-time ISSI visualization
- 5:29Data collection and modeling
- 8:19Evaluation with aligned positions
- 9:47Handling ambiguity in positioning
- 10:28Generalization across devices
- 11:34Future directions and limitations
- 12:21Q&A session
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