Secrecy capacity and outage probability of multiuser MIMO systems with zero forcing receivers

In this paper, we evaluate the secrecy performance of the zero forcing receiver operating in the multiuser multiple-input multiple-output (MIMO) system with user scheduling. We first derive the exact closed form expressions for the probability of non-zero secrecy capacity (PNZSC). We consider Rayleigh fading with non-identical fading parameters of the eavesdropper’s channel. We further derive the secrecy outage probability (SOP) which accurately reveals the secrecy diversity order and the secrecy array gain. Numerical results shows that our system is valid and accurate for any number of transmitter, receiver and eavesdropper antennas.