Research On Transmission Performance Issues Based On Reconfigurable Intelligent Surface

Compared with previous generations of technologies,in recent years,the widely used fifth-generation(5G)wireless communication technology faces more complex service scenarios and requires a secure communication environment with stronger transmission capabilities and higher reliability.However,traditional technologies bring problems such as cost and complexity while solving problems.Reconfigurable Intelligent Surface(RIS)technology adaptively adjusts the intelligent transmission environment,which has great potential to improve the quality of the communication environment at low cost and low energy consumption.At the same time,the physical structure of RIS gives it advantages in combining physical layer security technology to improve wireless transmission security.Therefore,it is of great significance to study the performance of communication systems combined with RIS in actual transmission scenarios and information security fields.This paper focuses on RIS research,and proposes general analysis methods for the performance analysis of RIS assisted wireless communication system in various fading scenarios and performance analysis of RIS to achieve secure communication.The main work of the paper is as follows:(1)This paper considers a full-duplex RIS-assisted wireless communication system.This paper uses some mathematical theorems to design analysis methods that are common to a variety of practical scenarios and can obtain closed-form solutions,aiming to solving the problem that the required system performance indicators cannot be obtained in a closedform solution under a variety of commonly used fading environments,and the problem that different analysis methods lead to performance analysis errors.The simulation results prove that the proposed analysis method is correct.(2)This paper considers a RIS single-user eavesdropping model.In the passive eavesdropping scenario,this paper considers two situations of perfect phase offset and phase error of RIS,and propose unified channel statistical characteristic analysis methods suitable for various fading distributions for the system.The proposed methods are used to analyze the selected safety performance indicators.The simulation results show that the proposed methods have good adaptability to a variety of fading environments,and the relationship between the characteristics of RIS itself and the security of wireless communication systems can provide guidance for RIS in improving the application of wireless communication security.