IRS phase rotation design signal transmitting method based on maximum receiving signal-to-noise ratio

Abstract

The invention provides an IRS phase rotation angle signal transmitting method based on a maximum receiving signal-to-noise ratio. The method comprises the steps that a sender modulates information bits to obtain modulated signals; the sender generates an optimal phase rotation angle according to the channel information fed back by the receiver and the principle of maximizing the received signal-to-noise ratio, and adjusts the phase angle of the intelligent reflecting surface through the controller; and after the sender processes the modulated signal by using the optimal beamforming scheme, themodulated signal is transmitted through all transmitting antennas. In IRS-assisted MISO system transmission, compared with a traditional phase rotation design scheme, the new optimal maximized received signal-to-noise ratio iterative calculation method provided by the invention can stably converge to a globally optimal solution and has relatively low calculation complexity. In practical application, only some phase units on the IRS can be adjusted, the optimal solution under the condition can still be found by the method, and the method has good flexibility.

Description

technical field [0001] The present invention relates to wireless communication physical layer security technology, in particular to Multiple Input Single Output (Multiple Input Single Output, MISO) technology and Intelligent Reflecting Surface (Intelligent Reflecting Surface, IRS) technology. Background technique [0002] As a 6G wireless transmission solution that improves spectrum and energy efficiency, the intelligent reflector IRS has multiple passive reflection units that can reflect and adjust the phase of the signal. Compared with the traditional scheme of increasing the antenna array, the IRS technique can provide similar multipath gain while avoiding expensive hardware requirements. At the same time, the cheap IRS has flexible usage scenarios and can be covered on the surface of outdoor buildings and indoor walls. Therefore, under the trend of pursuing high spectrum efficiency, high energy efficiency and low bit error rate in the future, IRS will become a wireless ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the optimal phase rotation cannot be stably obtained with a low-complexity algorithm in the IRS-MISO system, the present invention provides a low-complexity Optimal Iteration (Optimal Iteration, OI) calculation, which has a low complexity , at the same time, it can stably obtain the optimal phase rotation design, and has a very flexible usage scenario

Images