Communication optimization method and device for IRS auxiliary communication system

Abstract

The invention discloses a communication optimization method and device for an IRS auxiliary communication system. The communication optimization method comprises the steps of determining an initial position of UE taking the initial position of the UE as a sphere center, and taking a reference position in the space sphere; determining a preliminary channel and a reference channel between the UE andthe IRS according to the preliminary position of the UE and the distance between the reference position and the IRS position; determining a channel between the AP and the IRS according to the distance information between the position of the AP and the position of the IRS; determining a preliminary matrix and a reference matrix of the IRS according to the preliminary channel and the reference channel between the UE and the IRS and the channel between the AP and the IRS; realizing communication between the AP and the UE based on the preliminary matrix and the reference matrix of the IRS, determining channels corresponding to different reflection coefficient matrixes of the IRS, and selecting the matrix with the maximum channel strength as an optimal matrix; and realizing effective communication between the AP and the UE based on the optimal reflection coefficient matrix. According to the invention, the optimization of the IRS auxiliary communication system is realized.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and more specifically, to a communication optimization method and device for an IRS assisted communication system. Background technique [0002] There is an important problem in the field of 5G wireless communication: the millimeter wave penetration ability of its main band is poor, and it is easy to be blocked by obstacles. Without other means, it is difficult to guarantee the effect of wireless communication in complex scenarios such as indoors. Previously, someone proposed an idea to solve this problem: designing a passive, reflective, reconfigurable, low-cost smart surface (LIS / Large Intelligent Surface / Reconfigurable Meta-Surfaces / IRS / IntelligentReflecting Surface, etc., IRS is used to assist wireless communication. By placing and distributing at a suitable location, the signal can be controllably reflected to the desired direction at the IRS, which is equivalent to ad...

AI Technical Summary

Problems solved by technology

[0004] In view of the defects of the prior art, the purpose of the present invention is to solve the technical problem that the IRS reflection coefficient needs to be optimized and adjusted so that the IRS-assisted wireless communication system can communicate more effectively in complex and changeable situations

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