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IRS-assisted MISO system performance optimization method for hardware distortion

A technology of system performance and optimization method, applied in transmission systems, radio transmission systems, energy reduction and other directions, can solve problems such as inaccurate modeling of base station hardware distortion and asymmetric characteristics

Active Publication Date: 2021-09-07
XI AN JIAOTONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, this model cannot accurately model the asymmetric nature of base station hardware distortion (I / Q imbalance)

Method used

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  • IRS-assisted MISO system performance optimization method for hardware distortion
  • IRS-assisted MISO system performance optimization method for hardware distortion
  • IRS-assisted MISO system performance optimization method for hardware distortion

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Embodiment Construction

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0067] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude one or Presence or addition of multiple other features, integers, steps, operations, elements, components and / or collections thereof.

[0068] It should also be understood that the terminology used ...

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Abstract

The invention discloses an IRS-assisted MISO system performance optimization method for hardware distortion, and the method comprises the steps that a multi-antenna base station wide linear precodes messages of M information users, generates a baseband transmission signal, processes the baseband transmission signal into an asymmetric Gaussian signal, and generates an output signal through a high-power amplifier; with the assistance of an intelligent reflecting surface, the multi-antenna base station transmits the output signal generated by the high-power amplifier in a broadcasting manner, and controls the phase shift of a reflecting element in real time through a controller on the intelligent reflecting surface; the rates of M information users are decoded; and by taking the rates of the M information users as performance evaluation, a base station beam forming vector and a phase shift vector at an intelligent reflecting surface are optimized under the condition of satisfying the total power constraint of the base station, and the minimum reachable rates of the information users are maximized to complete performance optimization. According to the invention, the IGS is used for transmission, so that the reachable rate of the information user is further improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an IRS-assisted MISO system performance optimization method aimed at hardware distortion. Background technique [0002] In a wireless communication system, in order to serve multiple users at the same frequency at the same time, it is necessary to adopt a multi-antenna technology at the base station. The multi-antenna technology significantly improves the degree of freedom of space, which is beneficial to eliminate interference between users, thereby increasing the reachable rate of information users. At the same time, an intelligent reflective surface (IRS) is deployed near the user. By adjusting the phase shift at the IRS, the radio frequency signal from the base station is gathered at the receiver of the information user, which can significantly improve the signal strength of the receiver of the information user, thereby Further improve the reachabl...

Claims

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Application Information

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IPC IPC(8): H04B7/01H04B17/318H04B17/345H04B17/382
CPCH04B7/01H04B17/318H04B17/345H04B17/382Y02D30/70
Inventor 张超黄向锋
Owner XI AN JIAOTONG UNIV
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