Secrecy Capacity Achieving with Physical Layer Security Approach in MIMO Two-Way Relay Channels
نویسندگان
چکیده
In this paper, we propose a novel secure transmission scheme for MIMO Two-Way Relay Channels. By exploiting the properties of the transmission medium in the physical layer, our proposed scheme could achieve a high transmission efficiency as well as security. Two different approaches has been introduced including Information Theoretical approach and Physical Layer Encryption approach. Direction Rotation Alignment technique is the backbone of our scheme that is used to support high efficiency and security. We show our scheme is secure under three different adversarial models: 1) Untrusted relay attack model; 2) Trusted relay with eavesdropper attack model; 3) Untrusted relay with eavesdroppers attack model. Using the two different approaches, the secrecy capacities of our proposed scheme have been developed under these three models. Finally, simulation results are conducted to demonstrate that compared to the existing schemes, our proposed scheme could achieve a better performance in both transmission efficiency and security.
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