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Multi-mode waveguide modeling method for describing near-field characteristics of wireless channel

A wireless channel and modeling method technology, applied in the field of channel modeling, can solve problems such as the inability to use high-density networks, the increase in the computational complexity of geometric optical models, and the inappropriateness of waveguide models to describe and analyze near-field signal propagation. Reasonably complex effects

Pending Publication Date: 2022-01-18
SOUTHEAST UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to provide a multi-mode waveguide modeling method for describing the near-field characteristics of wireless channels, so as to solve the sharp increase in the calculation amount of the geometric optics model. The waveguide model is not suitable for describing and analyzing near-field signal propagation, and cannot be used in high-density networks.

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  • Multi-mode waveguide modeling method for describing near-field characteristics of wireless channel
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  • Multi-mode waveguide modeling method for describing near-field characteristics of wireless channel

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[0038] In order to better understand the purpose, structure and function of the present invention, a multimode waveguide modeling method of the present invention describing the near-field characteristics of wireless channels will be further described in detail in conjunction with the accompanying drawings.

[0039] The present invention comprises the following steps:

[0040] Step 1, such as figure 1 As shown, the present invention establishes a multimode waveguide model. The field strength at each point in the roadway is equal to the sum of the field strength of all reflection images at that point and the field strength of the source on the excitation surface. By solving Maxwell's equations, such as figure 2 As shown, the field distribution of each point in the roadway is expressed by using the folding method, and then the received signal power of each point in the roadway is obtained under the condition of smooth walls. The received signal power at each point in the road...

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Abstract

The invention discloses a multi-mode waveguide modeling method for describing near-field characteristics of a wireless channel. According to the method, a novel multi-mode waveguide model is established, geometrical optics and a waveguide model are combined, and the roughness loss of the inner wall of the roadway is considered. According to the multi-mode waveguide model, the limitation that a single-mode waveguide model cannot represent a multi-mode channel in a near field is corrected, and the roughness loss of a wall is considered, so that the model is more universal. The multi-mode waveguide model can be used for analyzing the influence of factors such as working frequency and roadway sectional area on received signal power under a multimode condition, and can be used for an empty straight roadway with a rough wall in an underground mine.

Description

technical field [0001] The invention belongs to the field of channel modeling, in particular to a multi-mode waveguide modeling method for describing near-field characteristics of wireless channels. Background technique [0002] For underground mine channels, there are mainly three solutions: geometric optics model, waveguide model and full wave model. In the geometric optics model, electromagnetic waves are approximated as optical rays. The electromagnetic field is obtained by summing the rays reflected off the side walls. Geometric optics models rely on computer simulations to obtain numerical solutions for path loss and signal delay at arbitrary locations, but the amount of computation increases dramatically as the signal path lengthens. The waveguide model does not require detailed information to describe the tunnel. It is the only model that can provide an analytical solution, but it is not suitable for describing and analyzing signal propagation in the near field, an...

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Application Information

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IPC IPC(8): H04B17/391H04B17/327
CPCH04B17/391H04B17/3912H04B17/327
Inventor 王承祥吉星宇常恒泰
Owner SOUTHEAST UNIV
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