Secrecy Outage Probability for MRC Receiver in Presence of Multiple Antenna Eavesdropper

In this paper, we consider a hybrid fading model in which line of sight (LOS) component is available between the transmitter and legitimate receiver and assume that eavesdropper is not in LOS from the transmitter. We analyze probability of existence of secrecy and secrecy outage probability for the case that the channels to the legitimate receiver are κ-μ faded and the channels to eavesdropper are Rayleigh faded. We present closed form expressions for existence of secrecy and a lower bound on secrecy outage probability when legitimate receiver and eavesdropper uses maximal ratio combining (MRC) diversity scheme to improve their performances in fading conditions. Results of analytical expressions are verified by an agreement of the results from simulation. Finally, it is concluded that the presence of LOS component improves secrecy of the system and stronger LOS component betters the secrecy.