Fig. 3From: Physical layer security analysis of IRS-based downlink and uplink NOMA networksCOP for downlink system versus \({\psi }\) as changing N (\({\eta _1} = 0.1\), \({R_1}\) = \({R_2}\)= 3 (bps/Hz), \(\beta = 2\), \({d_g} = 5\) (m), \({d_1} = 10\) (m), \({d_2} = 5\) (m), \({m_{{g_d}}}\)= \(m_{1,n}^d\) = \(m_{2,n}^d\) = 2, \({\lambda _{{g_d}}} = 1\), \(\varphi = 0.9\))Back to article page