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GSM-R interference source positioning algorithm evaluation method in non-line-of-sight environment

A GSM-R, non-direct wave technology, used in electrical components, wireless communications, etc.

Inactive Publication Date: 2016-07-20
NORTH ENG OF THE ELECTRIFICATION BUREAU GROUP CRCC +1
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  • Abstract
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  • Application Information

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Problems solved by technology

Therefore, in view of this situation, the present invention studies the performance evaluation method of the TOA / AOA hybrid positioning algorithm in the non-direct wave environment and considers that the mobile station may have position errors, and develops a GSM-R network under the non-direct wave environment The interference source TOA / AOA positioning algorithm performance evaluation method makes up for the lack of TOA / AOA hybrid positioning algorithm evaluation indicators in the non-direct wave environment and the mobile station may have position errors in the existing positioning algorithm evaluation system.

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Embodiment Construction

[0089] Below in conjunction with accompanying drawing and embodiment the present invention is described in detail

[0090] Such as figure 2 As shown, on the two-dimensional plane of the GSM-R network, seven mobile stations are deployed to measure the TOA and AOA values ​​of the interference sources, and the coordinates are (0,0), (866,500), (0,1000), (- 866,500), (-866,-500), (0,-1000), (866,-500), with (x i ,y i ), i=1,2,...,7 represent. Interference sources are randomly distributed which are represented by (x, y).

[0091] Step 1: Construct the CRLB lower limit calculation model of the TOA / AOA positioning algorithm in the non-direct wave environment through n TOA and n AOA measurements received by the positioning system.

[0092] First, define the unknown parameter vector as:

[0093] Z=[xy] T (33)

[0094] The measured distance r from the interference source to the i-th mobile station i and the radian measurement θ i for:

[0095]

[0096] where d i and is th...

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Abstract

The invention belongs to the field of railway wireless communication network interference source positioning technology, and relates to a GSM-R interference source positioning algorithm evaluation method in a non-line-of-sight environment. The GSM-R interference source positioning algorithm evaluation method mainly comprises the steps of firstly constructing a CRLB lower-limit calculation model for a TOA / AOA positioning algorithm in the non-line-of-sight environment; establishing a non-line-of-sight error distribution model based on a non-parameter kernel method, calculating a condition probability density function for a measured distance value and a measured radian value in a positioning system according to a probability density function of a direct wave measurement error, and calculating a CRLB lower limit of an interference source TOA / AOA positioning algorithm in the non-line-of-sight environment. The GSM-R interference source positioning algorithm evaluation method is beneficial in that the GSM-R interference source positioning algorithm evaluation method is suitable for random distribution; the CRLB lower-limit of the GSM-R network interference source TOA / AOA positioning algorithm in the non-line-of-sight environment is derived based on the model; a position error which may exists in a mobile station is considered; and a defect of no evaluation index for the TOA / AOA hybrid positioning algorithm in the non-line-of-sight environment on the condition that the position error may exist in the mobile station is settled.

Description

technical field [0001] The invention belongs to the technical field of interference source positioning for railway wireless communication networks, and relates to a performance evaluation method for a GSM-R network interference source positioning algorithm in a non-direct wave environment. Background technique [0002] GSM-R (GSMforRailway)——Global System for Mobile Communications for Railways, is a digital wireless system based on the GSM platform, the most mature and common public wireless mobile communication system in the world, specially tailored to meet railway applications. The communication system is a cost-effective railway dedicated wireless communication network. [0003] In the GSM-R wireless communication network system, due to the complex communication environment, it is easy to be interfered by various same-frequency signals and adjacent-frequency signals during the communication process. These wireless interference signals will affect the normal reception an...

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Application Information

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IPC IPC(8): H04W64/00
CPCH04W64/00
Inventor 张俊辉吴保德张洪岩黄际彦
Owner NORTH ENG OF THE ELECTRIFICATION BUREAU GROUP CRCC
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