Capacity analysis for secure Amplify-and-Forward two-way relay networks with channel estimation errors

In this paper, we study the channel estimation and data detection problem for secure Amplify-and-Forward two-way relay networks. It is shown that for the eavesdropper node, the signal processing process of channel estimation and data detection is quiet different from that of the destination node. The channel estimation errors of both the legal user and the eavesdropper are studied. Next we derive the closed-form expression of channel capacity with imperfect channel state information. Simulations are then provided to corroborate the proposed studies.