  In this letter, we introduce the performance of maximal ratio combining (MRC)
with weighting errors for physical layer security. We assume both legitimate
user and eavesdropper each equipped with multiple antennas employ non ideal
MRC. The non ideal MRC is designed in terms of power correlation between the
estimated and actual fadings. We derive new closedform and generalized
expressions for secrecy outage probability. Next, we investigate the asymptotic
behavior of secrecy outage probability for high signal-to-noise ratio in the
main channel between legitimate user and transmitter. The asymptotic analysis
provides the insights about actual diversity provided by MRC with weighting
errors. We substantiate our claims with the analytic results and numerical
evaluations.
