Low-Cost and Long-Range Node-Assisted WiFi Backscatter Communication for 5G-Enabled IoT Networks

Figure 3

PHY overview: Node1 transmits its data to the 5G-CPE (in blue), and the transited signal (in grey) is also received by Tag2-1, Tag2-2, and Node2. Tag2-1 uses this WiFi signal as excitation signal and transmits its data to Tag2-2 and Node2 (in red).