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Method of acquiring channel information for ray tracing of anti- or scattered propagation

A scattering propagation and ray tracing technology, which is applied in the field of ray tracing for reverse or scattering propagation to obtain channel information, can solve the problems of increased calculation amount and low channel model efficiency, and achieves the goal of broadening the application scope and improving the efficiency of multipath geometry calculation. Effect

Active Publication Date: 2019-08-30
北京飞鸿云际科技有限公司
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AI Technical Summary

Problems solved by technology

Although this method can describe the surface very flexibly, it increases the amount of calculation for scenes with a large number of pure planes (indoor and outdoor urban areas), which leads to the inefficiency of the channel model obtained by the ray tracing deterministic channel modeling method. relatively low

Method used

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  • Method of acquiring channel information for ray tracing of anti- or scattered propagation
  • Method of acquiring channel information for ray tracing of anti- or scattered propagation
  • Method of acquiring channel information for ray tracing of anti- or scattered propagation

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Embodiment 1

[0050] The processing flow of a method for obtaining channel information through ray tracing for inverse or scattering propagation provided by this embodiment is as follows: figure 1 As shown, the following processing steps are included:

[0051] Step S10: Realize the geometric description of each object with multiple layers.

[0052] This step performs the preprocessing process of the scene geometric model, and realizes the geometric description of the object on each ray reflection or scattering propagation path with three layers: the first layer is the bounding box layer, the second layer is the closed polygon layer, and the third layer is A triangle surface element layer.

[0053] The above-mentioned bounding box layer is the smallest cube that can cover the object, the bounding box layer can describe the shape and size of the object, and the geometric information stored in the bounding box layer is the vertex information of the object.

[0054] The above-mentioned closed...

Embodiment 2

[0083] The user imports the 3D electronic map and transceiver deployment parameters into the ray tracing simulator. The 3D electronic map can be used for network planning and network optimization maps in large-scale scenarios based on open street map format and planet format.

[0084] Ray tracing reads the electronic map and creates a bounding box layer for each object. For example, image 3 It is a schematic diagram of a bounding box layer of a vehicle provided by an embodiment of the present invention, Figure 4 The vehicles shown are enclosed in a cube, image 3 is the schematic diagram of the closed polygon layer of the vehicle, Figure 5 It is a schematic diagram of the triangular surface element layer of the vehicle.

[0085] If the existing surface of the object is a polygon (>=4 vertices) and is a plane, a closed polygon layer is established. For example: roofs and walls of buildings, car windows and other planes;

[0086] Triangulate all geometric surfaces (plane...

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Abstract

The invention provides a method of acquiring channel information for ray tracing of anti- or scattered propagation, and the method comprises the following steps of implementing geometric description of each object in three layers, wherein the first layer is a bounding box layer, the second layer is a closed polygon layer, and the third layer is a triangular panel layer; performing spatial segmentation, occlusion detection and visible surface decision processing on the object based on the geometric description implemented by the three layers of each object; obtaining the reflection and scattering paths of the ray based on the results of the spatial segmentation, occlusion detection and visible surface decision processing of each object, and obtaining the electromagnetic information of the effective reflection diameter and the scattering diameter of the ray based on the reflection and scattering paths of the ray and combined with the electromagnetic model. The method provided by the invention describes planes of different types by hierarchical geometric description of the tracked objects, and flexibly supports the three-dimensional description of the complex structures and the regular objects, thereby making the ray tracing adapt to various types of scenes, broadening the application range, and increasing the anti- or scattered multipath geometry calculation efficiency.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for acquiring channel information through ray tracing for back or scattering propagation. Background technique [0002] Network planning and evaluation of its key technologies are inseparable from accurate channel modeling. Traditional empirical or random channel models cannot accurately describe the three-dimensional channel characteristics in different frequency bands and different deployment methods. Therefore, deterministic channel modeling methods that can be aware of the environment are needed. The deterministic channel modeling method that can perceive the environment in the prior art is mainly the ray tracing deterministic channel modeling method based on the digital electronic map, which is based on the principle of geometric optics and can accurately describe direct, reflection, scattering, transmission, and diffraction The propagation of vario...

Claims

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Application Information

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IPC IPC(8): G01B21/20G01V3/12
CPCG01B21/20G01V3/12
Inventor 何丹萍官科王龙河
Owner 北京飞鸿云际科技有限公司
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