High-frequency channel modeling method and device based on shelter attenuation factor

An attenuation factor and channel modeling technology, applied in transmission monitoring, electrical components, transmission systems, etc., can solve the problem of not considering the influence of occluded moving objects on channel propagation characteristics.

Pending Publication Date: 2021-07-27
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the channel modeling of these existing high-frequency indoor non-line-of-sight scenarios is all based on static occluders, that is, a structure consisting of walls and windows between outdoo

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  • High-frequency channel modeling method and device based on shelter attenuation factor
  • High-frequency channel modeling method and device based on shelter attenuation factor
  • High-frequency channel modeling method and device based on shelter attenuation factor

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Embodiment 1

[0067] This embodiment provides a high-frequency indoor channel modeling method based on the attenuation factor of an obstruction, aiming at improving the accuracy of the channel model in complex scenes. Aiming at the impact of obstructions on wireless channel path loss during high-frequency transmission in non-line-of-sight scenarios, the present invention first uses the basic theory of electromagnetic wave propagation to analyze the impact of obstructions on radio wave propagation; and then determines the need for modeling Objective parameters: occluder attenuation factor and path loss index; initialize the basic structure of the occluder attenuation factor model based on a typical logarithmic distance model, and analyze the additional impact of the objective variable on the receiver caused by the relative position of the occluder in the actual scene Carry out mathematical modeling, use the minimum mean square error to fit the parameters, and obtain this model, so that it can...

Embodiment 2

[0090] This embodiment provides a high-frequency channel modeling method based on the attenuation factor of the occluder, such as figure 1 shown, including the following steps:

[0091] Step 1: Build a measurement environment for high-frequency indoor office scenes;

[0092] Step 2: Measure according to different positions of the obstruction and collect measurement data;

[0093] Step 3: Construct the initial model of the channel with the attenuation factor of the occluder. The expression of the initial model is as follows:

[0094]

[0095] Among them, PL(d 0 , f) means at reference point d 0 , the path loss value when the transmission frequency is f, the unit is dB, n represents the path loss index PLE (Path Loss Exponent, PLE), and SAF(D, f) is the distance between the receiving end and the obstruction D when the transmission frequency is f Additional path loss attenuation value caused by occluders, is mean zero and standard deviation σ SAF The Gaussian distributi...

Embodiment 3

[0128] This embodiment provides a high-band channel modeling device based on an obstruction attenuation factor, and the device includes:

[0129] Data acquisition module: used to obtain measurement data: the measurement data includes the distance d between the receiving end and the signal source at each location point, the distance D between the receiving end and the obstruction, and the path loss value PL of each location point;

[0130] Initial model module: used to construct the initial model of the channel with occluder attenuation factors:

[0131]

[0132] Among them, PL(d,f) represents the path loss value when the transmission frequency is f at a distance from the signal source d, PL(d 0 ,f) means that at a distance from the signal source d 0 where , the path loss value when the transmission frequency is f, n represents the path loss index, SAF(D,f) is the additional path loss attenuation value caused by the obstruction when the transmission frequency is f and the r...

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Abstract

The invention discloses a high-frequency channel modeling method and device based on a shelter attenuation factor. Aiming at the influence of a shielding object on the path loss of a wireless channel during high-frequency transmission in a non-line-of-sight scene, the method comprises the following steps: firstly, analyzing the influence of the shielding object on radio waves in a propagation process by utilizing a basic theory of electromagnetic field propagation; then determining target parameters needing modeling: a shelter attenuation factor and a path loss index; and initializing a basic structure of a shelter attenuation factor model according to a typical logarithmic distance model, performing mathematical modeling by analyzing additional influence of target variables on a receiving end due to different shelter positions in an actual scene, and fitting target parameters by using a minimum mean square error to obtain the model. According to the method, the influence of the shielding object on a terminal signal in a real communication scene can be more accurately represented, and compared with a traditional model, an influence factor of the shielding object is added, so that the method is closer to a real measurement result.

Description

technical field [0001] The invention relates to a high-frequency channel modeling method and device based on an attenuation factor of an obstruction, and belongs to the technical field of wireless mobile communication. Background technique [0002] At present, the global 5G as a whole is on the eve of commercial use. With the rollout of 5G infrastructure construction, the implementation of SA independent networking standards, and the wave of 5G mobile phone terminal replacement, the traffic in the 5G era will explode by tens or even hundreds of times. . At the same time, end users have higher and higher requirements for communication service quality, which leads to explosive growth of wireless data traffic, and it is imminent to solve the problem of spectrum resource shortage. At present, low-frequency spectrum resources (below 6 GHz) are gradually congested, and it is difficult to obtain continuous large-bandwidth spectrum resources, while high-frequency wireless spectrum ...

Claims

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Application Information

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IPC IPC(8): H04B17/309H04B17/391
CPCH04B17/309H04B17/391
Inventor 杨丽花刘加欢常浩飞任露露杨钦
Owner NANJING UNIV OF POSTS & TELECOMM
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