Secrecy Performance Analysis of Opportunistic Scheduling in Multiuser Untrusted Relay Networks
Zhao Ru · Journal of Shanxi University · 2015
To improve the physical-layer security performance in the multiuser untrusted relay networks,we propose an opportunistic scheduling combined with cooperative jamming(OSCJ)scheme.We derive the analytical expression of the ergodic secrecy capacity(ESC)lower bound for the OSCJ scheme and the closed-form expression of the lower bound of the secrecy outage probability(SOP).Furthermore,we conduct an asymptotic analysis for ESC.The numerical simulations validate the accuracy of our analysis and show that the proposed OSCJ scheme outperforms the random scheduling and jamming scheme in terms of both ESC and SOP performance.