An ε-DP stochastic quantizer applied to Givens rotation and phase angles in 802.11 CSI feedback provides privacy against activity signatures while preserving beamforming performance.
Device- free human activity recognition using commercial WiFi devices,
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Protecting Human Activity Signatures in Compressed IEEE 802.11 CSI Feedback
An ε-DP stochastic quantizer applied to Givens rotation and phase angles in 802.11 CSI feedback provides privacy against activity signatures while preserving beamforming performance.