Compressed sensing mine target positioning method based on discrete dynamic mesh selection

A compressed sensing and target positioning technology, applied in the field of compressed sensing mine target positioning based on discrete dynamic grid selection, can solve the problems of continuous measurement and storage of signal strength, discretization of positioning areas, etc., to achieve accurate estimation, reduce The effect of positioning error and improving positioning accuracy

Pending Publication Date: 2018-07-06
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0004] The positioning target in the mine is arbitrary in the underground, so the positioning coordinates of the mine target positioning system should be continuous, but the continuous

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  • Compressed sensing mine target positioning method based on discrete dynamic mesh selection
  • Compressed sensing mine target positioning method based on discrete dynamic mesh selection
  • Compressed sensing mine target positioning method based on discrete dynamic mesh selection

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Embodiment Construction

[0032] In order to make the effects and advantages of the technical solution of the present invention more clear, the compressed sensing mine target positioning method based on discrete dynamic grid selection of the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] see figure 1 , figure 2, the compressed sensing mine target positioning method based on discrete dynamic grid selection of the present invention, including offline state and online state:

[0034] (1) Offline stage: In the wireless local area network environment, the positioning space is discretized, and the signal strength is calculated using the propagation model in the discrete area, and the characteristic fingerprint library is obtained and stored in the server;

[0035] (2) Online stage: the target transmits a signal, samples the signal strength of the target at the reference position, and obtains the measured value vector...

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Abstract

The invention discloses a compressed sensing mine target positioning method based on discrete dynamic mesh selection for mainly the problem of reducing the influence of electromagnetic interference onthe positioning accuracy in a mine environment, so that the positioning accuracy is significantly improved. The method comprises the following steps: in an offline state, sampling signal strength indiscrete regions to obtain a feature fingerprint database; and transmitting signals in an online state, performing signal strength sampling on the target at a reference location to obtain a measurement value vector, in a first positioning phase, constructing a measurement matrix via a reference node location, importing the measurement matrix into the fingerprint database from a server, constructing a sparse base, and performing dynamic selection on divided grid areas via a reconstruction algorithm under the condition that the measurement matrix and the sparse base met irrelevant conditions toobtain several optimal grid locations, in a second positioning phase, obtaining corresponding coordinates of the several grid areas obtained based on compressed sensing positioning via the fingerprintdatabase, selecting a corresponding weighting function, and accurately calculating a final location of the target by using a grid centroid method.

Description

technical field [0001] The invention belongs to the field of mine target positioning, and relates to a compression sensing mine target positioning method based on discrete dynamic grid selection. It is suitable for underground positioning environments with large electromagnetic noise interference and low communication overhead. Background technique [0002] In recent years, with the continuous development of wireless network technology and Internet of Things technology, various positioning technologies have emerged in an endless stream. The use of wireless local area network for positioning has become a hot research topic, and has received corresponding applications in the fields of industry, agriculture and daily life. application. Whether it is positioning in a complex environment under industrial construction, or outdoor positioning or indoor positioning in life, positioning technology is closely related to our lives. Traditional positioning systems are usually based on...

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Application Information

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IPC IPC(8): H04W4/029H04W4/30H04W84/12G01S5/02G01S5/12G01S11/06
CPCH04W4/023H04W4/025H04W84/12G01S5/0252G01S5/12G01S11/06
Inventor 田子建徐志明
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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