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Design method of intelligent reflection surface assisted indoor terahertz MIMO communication system

A reflective surface and communication system technology, applied in transmission systems, radio transmission systems, passive electrical relay systems, etc., can solve problems such as terahertz signal blocking

Active Publication Date: 2020-06-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, once terahertz communication is used in indoor scenarios, terahertz signals are easily blocked by obstacles such as walls, furniture, ceilings, etc.

Method used

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  • Design method of intelligent reflection surface assisted indoor terahertz MIMO communication system
  • Design method of intelligent reflection surface assisted indoor terahertz MIMO communication system

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Effect test

Embodiment

[0064] In this embodiment, a Matlab simulation platform is used for experiments.

[0065] S1. Set the parameters of the terahertz MIMO system, including the number of IRS units N IRS =32, number of base station antennas N BS =128 and the number of radio frequency chains M BS =4, the number of user antennas N MS =32 and the number of radio frequency chains M MS =4, codebook size Gene retention ratio η=0.5, known perfect channel information H. The system operating frequency is 0.34THz. Channel H 1 and H 2 geometric channel model

[0066]

[0067] Among them, the number of paths L=3, the path gain physical angle θ IRS and θ BS Uniformly distributed in [0,2π]. array response vector

[0068]

[0069] where d=λ / 2=c / (2f), c=3×10 8 m / s. The expressions of other array responses can refer to a(θ BS ), channel H 2 The expression of can refer to H 1 . In addition, set the signal-to-noise ratio SNR = ρ / δ 2 ∈[-40,0]dB, the number of data streams transmitted by th...

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Abstract

The invention belongs to the technical field of high-frequency wireless communication, and particularly relates to a design method of an intelligent reflection surface assisted indoor terahertz MIMO communication system. The scheme of the invention is as follows: the communication system comprises a base station equipped with NBS antennas and MBS radio frequency chains, an intelligent reflectionsurface formed by NIRS reflection array elements, and a mobile user terminal equipped with NMS antennas and MMS radio frequency chains. And the base station sends NS data streams to the mobile user side through the intelligent reflection surface, a joint optimization function is established by taking maximization of the downlink transmission data rate as a target, and the problem of maximization of the transmission data rate of the system is optimized based on a genetic algorithm of artificially reserving excellent genes. Compared with the traditional technology, the scheme of the invention can greatly reduce the calculation complexity of IRS reflection unit phase search.

Description

technical field [0001] The invention belongs to the technical field of high-frequency wireless communication, and in particular relates to an indoor terahertz MIMO communication system design method assisted by an intelligent reflecting surface (Intelligent Reflecting Surface, IRS). Background technique [0002] In recent years, the sixth generation (Sixth Generation, 6G) wireless mobile communication has attracted widespread attention, and it caters to various communication needs of people for wireless networks. In order to meet different application scenarios, such as virtual reality, holographic communication, wireless data center, wireless backhaul network, etc., it is urgent to develop new spectrum resources for future 6G communication systems. Compared with the microwave and millimeter wave frequency bands, the terahertz frequency band is considered to be a suitable choice for providing large bandwidth and sufficient spectrum resources. Specifically, terahertz communi...

Claims

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Application Information

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IPC IPC(8): H04B7/0456H04B7/145G06N3/12
CPCG06N3/126H04B7/0456H04B7/0478H04B7/145
Inventor 李卓洵陈智马新迎
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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