A secure transmission method based on large-scale reconfigurable smart surfaces for 5G applications

Abstract

A 5G application-oriented secure transmission method based on a large-scale reconfigurable intelligent surface belongs to the field of information security technology. A secure transmission method based on a large-scale reconfigurable smart surface for 5G applications proposed by the present invention uses an iterative optimization algorithm with low computational complexity to gradually approach the optimal security beam of a large-scale reconfigurable smart surface-assisted secure communication system Shaping and passive reflective beamforming are designed to maximize the security and energy efficiency of the system and improve the security transmission performance of the wireless communication system under the constraints of transmitting power budget and discrete phase shift.

Description

technical field [0001] The invention belongs to the technical field of information security, and specifically relates to a 5G application-oriented secure transmission method based on a large-scale reconfigurable intelligent surface (Reconfigurable Intelligent Surface, RIS). Background technique [0002] 5G's low latency, high reliability, fast access, and high security and low power consumption security requirements have brought challenges to security encryption methods. Different from the traditional upper-layer encryption mechanism that relies entirely on the confidentiality of the key and strong computing, the physical layer secure transmission aims to use the randomness and uniqueness of the wireless channel combined with advanced signal processing technology to establish a dominant main channel and ensure legal transceivers While communicating reliably, it prevents illegal users from stealing confidential information from received signals. However, the traditional phys...

AI Technical Summary

Problems solved by technology

[0002] 5G's low latency, high reliability, fast access, and high security and low power consumption security requirements bring challenges to security encryption methods

However, at present, only a reconfigurable smart surface-assisted security rate maximization problem is usually considered. 5G and future wireless communications are very likely to deploy RIS on a large scale. It is an important research work to explore how to use multiple RIS to assist secure communication.

Images