Wireless transmission method of irs assisted secure communication based on non-ideal csi

Abstract

The invention discloses a non-ideal CSI-based wireless transmission method for IRS assisted secure communication. The implementation steps of the method are as follows: 1) In a single-cell downlink communication system for IRS assisted communication, single-antenna legal users and multi-antenna base stations are respectively Send the pilot sequence to the IRS, and the IRS estimates the user's CSI; 2) In order to minimize the transmission power and meet the worst-case user safety rate greater than a certain threshold, the base station and the IRS design the beam according to the obtained non-ideal CSI The vector and IRS phase transfer matrix are formed for signal transmission. This method not only ensures the security of user communication, but also saves resources, and meets the requirements of green communication and safe communication.

Description

technical field [0001] The invention relates to a wireless transmission method, specifically based on non-ideal of The invention relates to a wireless transmission method for auxiliary safety communication, which belongs to the technical field of wireless communication. Background technique [0002] With the development of microelectromechanical systems and metamaterial technologies, real-time control of the phase shift of reflected signals via programmable surfaces has become feasible. This enables a new wireless device called an intelligent reflecting surface (IRS), which can be flexibly deployed in wireless networks to improve the performance of the overall communication system. It usually consists of a large number of low-cost passive reflective elements, each capable of adjusting the phase shift to reflect the incoming wireless signal. By adaptively adjusting the phase shift of the reflection unit, The reflected signal can be at the receiver with a non- The re...

AI Technical Summary

Problems solved by technology

[0003] Compared with traditional communication methods, the use of Communication has the following characteristics: First, compared with the traditional relay, Does not use a transmitter module, only reflects the received signal using a passive array, so there is no additional power consumption; in addition, active repeaters usually operate in half-duplex mode, so their spectral efficiency is lower than that of full-duplex operating in duplex mode (Although the relay can also work in full duplex, it will inevitably suffer from severe self-interference, which requires complex interference cancellation technology); Unlike backscatter communication, Used to enhance the performance of existing communication links without passing any information of itself through reflection

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