Figure 3From: Adaptive power allocation and outage performance of cognitive best relay cooperation systems with multiple primary transceiver pairs and direct path between cognitive source and destinationThe impact of the cognitive direct link and the outage threshold μ th S on outage performance. (a) Impact of ω ϕ and (b) impact of outage thresholds μ th S . The arrows denote the corresponding curves for given system parameters.Back to article page