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Two-dimensional TDOA cooperative node deployment method based on radio frequency identification technology

A radio frequency identification technology and a technology of cooperative nodes, which are applied in the field of two-dimensional TDOA cooperative node deployment, can solve problems such as being in the initial stage

Active Publication Date: 2015-04-15
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

[0005] It should be pointed out that the reasonable deployment of cooperative nodes in the TDOA solution scheme is also very important for improving the positioning accuracy of radio frequency identification, but the related research is still in its infancy

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  • Two-dimensional TDOA cooperative node deployment method based on radio frequency identification technology
  • Two-dimensional TDOA cooperative node deployment method based on radio frequency identification technology
  • Two-dimensional TDOA cooperative node deployment method based on radio frequency identification technology

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Embodiment Construction

[0027] The gist of the present invention is to propose a radio frequency identification technology-based method for deploying cooperative nodes in a two-dimensional positioning environment. The method uses the TDOA positioning mechanism to quickly and accurately obtain the optimal deployment method and deployment position of multiple cooperative nodes. , effectively reducing the GDOP value of the label to be located and improving the positioning accuracy of the system.

[0028] Attached below figure 1 Embodiments of the present invention are further described in detail.

[0029] Firstly, the application scenario of the present invention is set. The two-dimensional TDOA-based radio frequency identification positioning system plans to introduce W cooperative nodes, and adopts a step-by-step deployment method to deploy cooperative nodes one by one. The first cooperative node introduced is defined as the first cooperative node, and the other cooperative nodes are defined as non-f...

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Abstract

The invention belongs to the technical field of mobile communication, and relates to a two-dimensional TDOA cooperative node deployment method based on a radio frequency identification technology. For the goal of minimizing a geometric dilution of precision, the method comprises the following steps: introducing cooperative nodes in a step-by-step manner according to the existing positional relationship between a reader and a label, updating the Jacobian matrix and covariance matrix of observation vectors by using the coordinates of the label as the observation vectors, obtaining a geometric dilution of precision expression of the system, establishing a stagnation point solving equation of the target azimuth of the cooperative nodes, solving and obtaining all stagnation point information by adopting a four-factor quadric type transformation method, and selecting the stagnation point corresponding to the minimum value of the geometric dilution of precision as the optimum layout azimuth of the cooperative nodes. The two-dimensional TDOA cooperative node deployment method can promote the precision of the positioning system, and quick and accurate layout of the cooperative nodes is realized.

Description

technical field [0001] The invention belongs to the technical field of mobile wireless communication, and relates to a two-dimensional TDOA coordination node deployment method based on radio frequency identification technology. Background technique [0002] With the wide application of mobile communication network and short-range communication technology, indoor wireless positioning technology has gained a wide range of application space, playing an active and important role in military, medical, logistics and other fields. Currently, two typical indoor wireless positioning technologies are wireless sensor positioning technology and radio frequency identification positioning technology. Among them, frequency identification and positioning measure the transmission characteristic information (such as time, phase, amplitude, etc.) of the radio signal between the tag and multiple readers, obtain the spatial position information between the tag and multiple readers, and establish...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00G01S5/02
CPCG01S5/02H04W64/00
Inventor 史伟光冯鑫于洋李建雄
Owner TIANJIN POLYTECHNIC UNIV
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