Research on physical layer security technology of multi-antenna system

Due to the broadcast nature of wireless communication medium, more and more attention has been paid to the security problem in wireless communication system. Aimed at physical layer security issues in multi-antenna system, several common multi-antenna techniques are focused on, and the theory indexes are introduced to assess secrecy performance. The influence of different system parameters on the system secrecy performance is simulated and analyzed. Finally, the directions of physical layer security in wireless channel worthy of research are presented.