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Table 4 Performance evaluation of target detection with measurements related to a single and double target moving along the main LOS path (connecting TX and RX2); both space- and frequency-domain correlation methods with optimized thresholds are employed

From: Leveraging MIMO-OFDM radio signals for device-free occupancy inference: system design and experiments

Method using optimized thresholds Sensitivity Specificity Accuracy FPR
Frequency-domain CSI correlation \(\phantom {\dot {i}\!}\mathbf {r_{\mathrm {\mathit {t,\ell _{j}}}}}\)) 0.89 0.78 0.88 0.2
Space-domain CSI correlation \(\phantom {\dot {i}\!}\mathbf {r_{\mathrm {\mathit {t,f_{k}}}}}\)) 0.93 0.83 0.92 0.16