Research Article

Optimal Improper Gaussian Signaling for Physical Layer Security in Cognitive Radio Networks

Table 5

Optimal degree of impropriety and secondary transmit power as a function of .

0.10.30.50.70.9

  min  0.230.230.230.240.25

  max  0.230.250.260.280.28

[dB] min  19.5918.2916.3114.2711.23

[dB] max  18.5613.709.836.964.43