Fig. 4From: Leveraging MIMO-OFDM radio signals for device-free occupancy inference: system design and experimentsExperimental layout for single and double target performance evaluation. a Office layout with one transmitter (TX) and two receivers (RX1 and RX2). b Single target d=1 scenario. c Two targets d=1,2 (i.e., Nd=2) with sample trajectories. d Simplified baseband model of the MIMO-OFDM device: CSI I/Q extraction and PHY protocol data unit injectionBack to article page