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Adaptive position fingerprint positioning method based on multi-dimensional feature fusion

A multi-dimensional feature and fingerprint positioning technology, applied in the field of mobile Internet, can solve problems such as blocking or scattering, large human body obstruction, weak satellite signal strength, etc., and achieve the effect of improving high availability, efficiency, and positioning accuracy

Inactive Publication Date: 2017-09-19
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] However, the strength of the satellite signal on the surface is very weak, and it is easily blocked or scattered by buildings and structures. It usually cannot penetrate the building wall, and the human body also hinders it greatly, making it impossible to enter the room. Therefore, there will be many indoor positioning blind spots, resulting in satellite The positioning system can work effectively outdoors, but indoor places where people often work and move cannot be located

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  • Adaptive position fingerprint positioning method based on multi-dimensional feature fusion
  • Adaptive position fingerprint positioning method based on multi-dimensional feature fusion
  • Adaptive position fingerprint positioning method based on multi-dimensional feature fusion

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with accompanying drawing:

[0029] Such as figure 1 Shown: The difficulty of indoor positioning technology is high cost and low accuracy. Collecting data in a WIFI environment not only reduces costs, but also helps to improve accuracy. In the offline stage, data collection and preprocessing are performed first, then the location fingerprint database is established, and finally the fingerprint data is clustered and divided into blocks.

[0030] The present invention comprises the following steps:

[0031] (1) Content-based positioning process:

[0032] 1.1 Set n reference points in the positioning area, with a certain length as the sampling interval, for example: divide the positioning area into small grids of 2m*2m, each grid is used as a reference point, and the smartphone can record the grid correspondence through the camera pictures or videos, so that the surrounding content can be obtained thro...

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Abstract

The invention discloses an adaptive position fingerprint positioning method based on multi-dimensional feature fusion, and the fingerprint positioning efficiency is improved through positioning based on content; the position fingerprint positioning realization process is improved, concepts of off-line stage signal strength data preprocess and finger print data cluster partition are provided, the fingerprint matching range is reduced, the positioning efficiency is improved, the multi-dimensional fingerprint construction is also provided, magnetic field intensity, acceleration and the like are added with RSSI in the prior art and coordinate information of a reference point to assist in positioning, and the positioning precision is improved. Multi-parameter matching can be performed in an online matching stage through constructing fingerprint with multi-dimensional feature, so that the positioning precision is improved; the RSS data is processed through combining Kalman filtering and performing smoothing filtering recurrence, so that the fingerprint data availability is improved; the efficiency of fingerprint matching is improved through providing a concept of fingerprint data cluster partition, online matching stage is fully prepared, and the method has the value of popularization and application.

Description

technical field [0001] The invention relates to the technical field of mobile Internet, in particular to an adaptive position fingerprint positioning method based on multi-dimensional feature fusion. Background technique [0002] With the rapid development of the mobile Internet, the demand for location-based services has attracted much attention, especially in large-scale, complex, and dynamic indoor scenes. Location-based services (LBS) have gradually become an indispensable part of people's life and work. Service information is helpful for early warning, mid-event decision-making, and post-event processing of emergencies in the network. For example, wireless network location services are used for underground positioning in coal mines, which can predict dangerous areas before disasters occur, obtain an escape route when disasters occur, and take effective measures to remedy them in time after disasters occur. Another example is the office area, where the staff can quickly...

Claims

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Application Information

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IPC IPC(8): H04W4/04H04W24/08H04W64/00G06K9/62
CPCH04W24/08H04W64/00G06F18/2321G06F18/2413
Inventor 尚凤军吴江
Owner CHONGQING UNIV OF POSTS & TELECOMM
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