Research on Physical Layer Security Schemes Based on Cooperative Wireless Communication

The significant concepts in the area of wireless communication are cooperative communication and physical layer security. Since current related research does not involve detailed performance analysis in different scenarios, the performance in different scenarios between amplify-and-forward scheme and cooperative-jamming scheme is compared. In combination with the characteristics of the both concepts, the physical layer security model based on cooperative communication, and the optimal secrecy capacity on amplify- and-forward scheme and cooperative-jamming scheme is analyzed. The number increase of antennas for relays can improve the secrecy performance, just like the number increase of relays. Simulation results show that amplify-and-forward scheme is more difficult to be effected by the scenarios and is more stable than cooperative-jamming scheme.