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Communication system transmission method based on intelligent reflection surface assistance

A reflective surface and communication system technology, applied in the field of wireless communication, to maximize spectral efficiency, optimize IRS phase shift, and improve spectral efficiency

Active Publication Date: 2021-12-03
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the deficiencies in the prior art, the present invention provides a communication system transmission method assisted by an intelligent reflective surface, and solves the problem of base station transmit beamforming vector and Joint optimization problem of IRS phase shift

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  • Communication system transmission method based on intelligent reflection surface assistance
  • Communication system transmission method based on intelligent reflection surface assistance
  • Communication system transmission method based on intelligent reflection surface assistance

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Embodiment Construction

[0128] The present invention is described in further detail now in conjunction with accompanying drawing.

[0129] It should be noted that terms such as "upper", "lower", "left", "right", "front", and "rear" quoted in the invention are only for clarity of description, not for Limiting the practicable scope of the present invention, and the change or adjustment of the relative relationship shall also be regarded as the practicable scope of the present invention without substantive changes in the technical content.

[0130] figure 1 It is a flowchart of a communication system transmission method based on intelligent reflective surface assistance in an embodiment of the present invention. This transfer method includes:

[0131] Combined with channel state information and user information, the transmit beamforming vectors and intelligent reflective surface phase shifts are optimized to maximize the spectral efficiency of the communication system:

[0132] (1) For the single-use...

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Abstract

The invention discloses a communication system transmission method based on intelligent reflection surface assistance, which comprises the following steps: aiming at an intelligent reflection surface assistance single-user communication system based on instantaneous channel state information, transmitting a beam forming vector by adopting a maximum ratio transmission design, and optimizing intelligent reflection surface phase shift by utilizing a manifold alternating optimization method; for a single-user communication system assisted by an intelligent reflection surface based on statistical channel state information, carrying out joint optimization on a transmitted beam forming vector and intelligent reflection surface phase shift by utilizing an alternating iterative optimization method; for an intelligent reflection surface assisted multi-user communication system based on instantaneous channel state information, adopting a zero-forcing precoding design to transmit a beam forming vector, and utilizing a positive semidefinite relaxation method to optimize intelligent reflection surface phase shift. According to the method, a manifold alternating optimization method, an alternating iterative optimization method and a positive semidefinite relaxation method are adopted, so that the joint optimization problem of the base station transmitted beam forming vector and the IRS phase shift is solved.

Description

technical field [0001] The invention relates to the technical field of IRS-assisted wireless communication, in particular to a communication system transmission method assisted by an intelligent reflective surface. Background technique [0002] With the vigorous development of emerging services such as the Internet of Things and mobile Internet and the proliferation of wireless devices, this puts forward higher requirements for B5G / 6G and above communication systems in terms of large-scale interconnection, spectrum efficiency, energy management, and deployment costs. Therefore, There is an urgent need to develop system architectures that can efficiently utilize energy and spectrum. In the past few decades, thanks to the advancement of various technologies, such as ultra-dense network (ultra-dense network, UDN), massive multiple-input multiple-output (MIMO) and millimeter wave ( millimeter wave (mmWave) communication, 5G wireless network has achieved high data rate, large sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/382H04W16/28H04W24/02
CPCH04B17/382H04W24/02H04W16/28Y02D30/70
Inventor 朱晓荣许丹宁陈康张汝楠张文锦
Owner NANJING UNIV OF POSTS & TELECOMM