Research Article

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

Table 3

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

[dB] 010203040

  min  0.590.450.220.100.05

  max  0.480.410.230.110.06

[dB] min  17.6518.9819.6119.6619.47

[dB] max  16.7318.1118.7618.9218.97