Research Article
Secure Information Transmissions in Wireless-Powered Cognitive Radio Networks for Internet of Medical Things
Figure 6
The transmission rate of the secondary system with respect to the primary transmission power PP. PST0 = 10 dB. dPST = 4 m, dSS = 2 m, dSPR = dPP-dPST, dSME = dSPR, dPME = dPP. The antenna number N = 4.