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Method for predicting electromagnetic wave propagation based on ray tracking method

A propagation prediction and ray tracing technology, applied in electromagnetic field characteristics, transmission monitoring, electrical components, etc., can solve the problems of received signal interference, high noise of electromagnetic waves, etc.

Inactive Publication Date: 2009-12-02
SHANGHAI UNIV
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Problems solved by technology

At the same time, the electromagnetic waves generated by the ignition of the engine when the vehicle is running will bring high noise, which will cause certain interference to the received signal

Method used

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  • Method for predicting electromagnetic wave propagation based on ray tracking method
  • Method for predicting electromagnetic wave propagation based on ray tracking method
  • Method for predicting electromagnetic wave propagation based on ray tracking method

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Embodiment Construction

[0070] A preferred embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings: this embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not Limited to the following examples.

[0071] refer to figure 1 , the operation steps of this electromagnetic wave propagation prediction method based on the ray tracing method are:

[0072] (a) determine geographic environment data information;

[0073] (b) Set the parameters of the emission source and the field point;

[0074] (c) Finding of the ray path;

[0075] (d) Calculation of receiving point field strength and path loss.

[0076] First set the building parameters, where the distribution and characteristics of the buildings are as figure 2 shown. The specific parameters of the building are as ...

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Abstract

The invention relates to a method for predicting electromagnetic wave propagation based on a ray tracking method, which comprises the steps of ray path searching, reflected and diffracted ray calculation, field intensity receiving, and path loss calculation. The conception of the method comprises the following steps: firstly, determining the position of an emission source, and finding out all propagation paths from the emission source to the ray of each test point according to building characteristics and distribution on a 3D map; secondly, determining reflection and diffraction losses and the like according to a Fresnel equation, a geometrical diffraction theory / uniform diffraction theory and the like so as to correspondingly obtain the field intensity from each path to each test point; and finally, performing coherence stack on the field intensities of all the arrived paths at the same test point to obtain the total received field intensity at each test point. The method has the advantage of better adaptability compared with the conventional statistical model. The method can be applied to predicting the electric wave propagation in a wireless communication system and adapts to the requirements on wireless network programming and designing.

Description

technical field [0001] The invention relates to a method for predicting radio wave propagation in the field of communication technology, in particular to a method for predicting electromagnetic wave propagation based on a ray tracing method. Background technique [0002] With the in-depth research on next-generation mobile communication technology, how to further improve spectrum utilization in the next-generation mobile communication system and provide users with better service experience has become the primary concern of researchers. When building a new-generation network communication test environment, in order to reduce the blindness of testing and networking, it is extremely necessary to first establish a radio wave propagation model. [0003] The prediction of electromagnetic wave propagation is mostly realized by on-the-spot measurement methods, which require a lot of manpower, material resources and financial resources, and the parameters estimated by the measurement...

Claims

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Application Information

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IPC IPC(8): G01R29/08H04B17/00H04B17/373
Inventor 李国辉王志彬张娟王慧娜严军
Owner SHANGHAI UNIV
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