Battery-free head orientation measurement using passive RFID tags.

Wearable Technol · 2025 · PMC11894406 · PMID 40071244

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a clear trendno p-value reported

Although the experiment detected a clear trend in RSSI ( Figure 9b ), it could not confirm that the difference represented head or gaze movements due to the low correlation between the RSSI readings and the random and continuous head rotation ( = 0.35).

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