IRS-based UE position determination method, communication method and system

Abstract

The invention discloses an IRS-based UE position determination method, a communication method and a system. The method comprises: selecting a preset number of reflection unit sets on an IRS, and activating each set according to a preset time sequence; after each set is activated, emitting electromagnetic signals to the set are reflected, wherein each activated set selects different code words according to a preset time sequence so as to reflect received electromagnetic signals according to different reflection directions; according to the intensity of the electromagnetic signal reflected by each set under each code word at the receiving end, determining the code word when the intensity of the reflected electromagnetic signal received by the receiving end is maximum, and determining the channel time delay under the code word, so as to determine the distance between each set and the UE according to the channel time delay; estimating the position of the UE according to the position of each set on the IRS and the distance between each set and the UE; and determining a reflection coefficient matrix or vector of the IRS according to the position of the UE, the IRS and the AP position, thereby realizing effective communication between the wireless AP based on the IRS and the UE. According to the invention, effective communication of the AP-IRS-UE channel is realized.

Description

technical field [0001] The present invention relates to the field of wireless communication, and more specifically, relates to an IRS-based UE location determination method, communication method and system. Background technique [0002] In the field of 5G wireless communication, millimeter wave plays an extremely important role. However, millimeter waves have a very serious defect, that is, they are easily blocked by obstacles, resulting in poor wireless communication. In order to solve this problem, there is an idea: add a low-cost, passive, reflective, reconfigurable smart surface (LIS / LargeIntelligent Surface / Reconfigurable Meta-Surfaces / IRS / Intelligent ReflectingSurface, etc., to the wireless communication environment, Hereinafter, IRS is used to assist communication. Especially when the wireless access point (Access Point, AP) and the user equipment (User Equipment, UE) cannot communicate effectively due to the presence of occlusion, the received signal strength is to...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of the prior art, the purpose of the present invention is to solve the problem that under the AP-IRS-UE channel, because the IRS is passive, if the reflection unit on the IRS does not perform a proper phase shift, the channel communication performance will be poor. Technical issues that don't even work

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