Abstract
We analyze the impact of outdated Channel State Information (CSI) on the secrecy performance of Multi-input, Multi-output, Multi-eavesdropper (MIMOME) system over Nakagami-m fading channels, where Transmit Antenna Selection (TAS) is used at the transmitter and Maximal-ratio Combination (MRC) is used at the desired receiver and the eavesdropper. In our analysis, new closed-form expressions for the probability of the existence of positive secrecy capacity and the secrecy outage probability are derived. We also derive the asymptotic secrecy outage probability, in which the secrecy diversity order and the secrecy array gain are revealed. Furthermore, the -outage secrecy capacity is characterized. Our results demonstrate that due to the outdated CSI, the secrecy performance sufiers from great loss, and the transmit diversity order is reduced to one, while the receive diversity order is not afiected.
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