Fig. 6From: Leveraging MIMO-OFDM radio signals for device-free occupancy inference: system design and experimentsPrincipal components and selected component numbers \(\overline {P}_{\ell }\) and \(\overline {P}_{f}\) obtained during the training phase from single target measurements with a space-domain and b frequency-domain CSI measurements. In c, the components corresponding to the two different targets #1 and #2 for the given link â„“1 are shownBack to article page