Fig. 3From: Performance analysis of cooperative cognitive MIMO multiuser downlink transmission with perfect and imperfect CSI over Rayleigh fading channelsEffect of the parameters of secondary systems on outage probability (ρ 1 = ρ 2 = 1, M = 2, Ω3 = Ω4 = 2, N 2 = 5) (a) N 1 = 2; (b) ω 1 = 2, ω 2 = 1Back to article page