In this paper, we have studied the effect of imperfect CSIon the secure performance of cluster-based multihop relayingnetworks. Over Rayleigh fading channels, we have derived twosecure performance metrics including the system secure outageprobability and the probability of non-zero secrecy capacity,which are expressed in closed-form expression. Numerical results are used to confirm the correctness of the analysis resultsshowing that channel estimation error affects significantly thesystem secure performance.
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