Fig. 7From: Leveraging MIMO-OFDM radio signals for device-free occupancy inference: system design and experimentsExamples of a link correlation vs. sub-carriers and b frequency correlation vs. links. Both empty environment (Environment) and occupied environment correlations, corresponding to the single and double target scenarios, are shown. The threshold values Ï„â„“,0=0.25 and Ï„f,0=0.28 are shownBack to article page