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A theoretical modeling method based on measurement data in the high-speed railway viaduct scene

A technology of measuring data and modeling methods, which is applied in transmission monitoring, network planning, electrical components, etc., and can solve problems such as ignoring channel regular changes and channel influences

Inactive Publication Date: 2016-02-24
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0007] For the actual channel measurement data, the statistical modeling method is often used to analyze the statistical characteristics of the channel. The disadvantage of this is that the regular changes of the channel are ignored. For example, the reflection area produced by regular buildings (such as catenary poles) Effect of characteristics

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  • A theoretical modeling method based on measurement data in the high-speed railway viaduct scene
  • A theoretical modeling method based on measurement data in the high-speed railway viaduct scene
  • A theoretical modeling method based on measurement data in the high-speed railway viaduct scene

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Embodiment Construction

[0049] In order to make the above objects, features and advantages of the present invention more comprehensible, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The following specific instructions will take the actual measurement environment and data of the viaduct scene on the Zhengxi Line as an example.

[0050] Refer to attached image 3 , which shows a schematic flow chart of the theoretical modeling method based on measurement data in the high-speed rail viaduct scene of the present invention, including:

[0051] Step 101: Model as attached Figure 4 As shown, the train traverses the base station along a straight track. A series of reflective areas with the catenary pole as the center are evenly distributed, and the central dot is represented by O i ,i=1...N, where the superscript i represents the serial number of the catenary pole. H and h represent the vertical distance from th...

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Abstract

The invention relates to a theoretical modeling method based on measured data under the scene of a high-speed train and a viaduct. According to the method, on the basis of analysis of actual channel measuring data, theoretical modeling is performed according to influences of a regularity building on communication between the ground and a train during the travelling process of the train. The method mainly comprises steps as follows: establishing a theoretical model according to the actual environment and train operation characteristics; calculating propagation time of each propagation path according to the established theoretical model; extracting power fading of each propagation path according to actually measured data; and establishing a theoretical propagation model through simulation. According to the method, a broadband wireless channel is modelled under the scene of the high-speed train, and the regular multipath characteristics of the channel are accurately described, so that the method has important significance on improving and optimizing the characteristics of a wireless system.

Description

Technical field: [0001] The invention relates to the technical field of wireless mobile communication, in particular to a theoretical modeling method based on measurement data in the scene of a high-speed rail viaduct. Background technique: [0002] The development of China's high-speed railway has attracted worldwide attention, which has promoted the rise and development of other related industries, such as communications, machinery manufacturing, and electric power, which in turn have generated huge economic benefits. As China enters the 3G era and is about to enter the 4G era, broadband mobile communication has become an indispensable part of high-speed rail services. Customers hope to experience audio, video, high-speed upload and download services through broadband access on high-speed trains. Broadband wireless access under high-speed conditions has the characteristics of large frequency deviation and fast Doppler changes, frequent switching and group switching, comple...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/22H04B17/391
Inventor 邱佳慧陶成刘留谈振辉程文璞
Owner BEIJING JIAOTONG UNIV
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