基于智能反射面的安全通信研究

Reconfigurable Intelligent Surface (RIS) technology realizes intelligent transmission environment in an adaptive way, and its physical structure makes it advantageous in integrating physical layer security technologies to improve wireless transmission security. Therefore, it is of great significance to study the performance of communication systems combined with RIS in various practical fading scenarios and information security fields. Currently, most research on RIS in secure communication considers Rayleigh fading scenarios and lacks research in other practical scenarios. This paperconsiders multiple fading scenarios and proposes a general analytical method for theoretical analysis of the secrecy outage probability (SOP) of RIS-assisted secure communication systems under multiple fading conditions, by combining mathematical theories such as the central limit theorem and Gamma distribution approximation. The results are verified by simulations. The experimental results show that the proposed analytical method is applicable to multiple fading scenarios, and the results also indicate that the wireless communication system\'s security can be improved by reasonably designing the RIS phase and the number of elements.