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An Indoor Positioning Method Based on Signal Strength Difference and Dynamic Linear Interpolation

A technology of poor signal strength and linear interpolation, applied in wireless communication, wireless communication services, electrical components, etc., can solve problems affecting the positioning effect, improve positioning accuracy, achieve simple implementation, and reduce offline training workload.

Active Publication Date: 2017-09-08
FUJIAN NORMAL UNIV
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Problems solved by technology

Therefore, in the positioning method based on signal strength difference, the selection of reference beacon nodes will affect the positioning effect

Method used

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  • An Indoor Positioning Method Based on Signal Strength Difference and Dynamic Linear Interpolation
  • An Indoor Positioning Method Based on Signal Strength Difference and Dynamic Linear Interpolation
  • An Indoor Positioning Method Based on Signal Strength Difference and Dynamic Linear Interpolation

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Embodiment 1

[0045] This embodiment provides an indoor positioning method based on signal strength difference and dynamic linear interpolation, which is characterized in that it includes the following steps:

[0046] 1) Divide the target area into uniform grids, and measure the received RSSI values ​​of each beacon node at each grid center point;

[0047] 2) Using the benchmark beacon node selection algorithm, select the beacon node with the most obvious distinction and the best stability for different reference points as the benchmark beacon node, and then calculate the SSD of each reference point based on the benchmark beacon node;

[0048] 3) Using a linear interpolation method based on SSD spatial correlation, insert fingerprints at the positions between the adjacent reference points to construct a radio frequency training map;

[0049] 4) Introduce the reference point SSD as the weight of each reference point, and participate in the K neighbor weighting algorithm to estimate the posit...

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Abstract

The invention relates to an indoor positioning method based on signal intensity difference values and dynamic linear interpolation. According to the method, firstly, a target region is divided into uniform lattices, and RSSI values of each received beacon node are measured at each received lattice center point; then, a standard beacon node selection algorithm is adopted, beacon nodes with the most obvious distinguishing effects on different reference points and the highest stability are selected as the most standard beacon nodes, and in addition, the signal intensity difference values of each reference point are calculated on the basis of the standard beacon nodes; next, a linear interpolation method based on the SSD (signal strength difference) space relevance is adopted, fingerprints are inserted in positions between the adjacent reference points, a radio frequency training map is constructed, and the training data collecting workload is reduced. In the linear positioning stage, and the reference point SSD is introduced to be used as the weight of each reference point to take part in the weighting, so the positioning is realized. The indoor positioning method has the advantages that simplicity is realized, the implementation is easy, the positioning precision is high, and the influence on the positioning calculation due to the out-of-date radio frequency maps caused by factors of RSSI random shaking, indoor personnel walking and the like can be effectively reduced.

Description

technical field [0001] The invention relates to the field of indoor wireless positioning, in particular to an indoor wireless positioning method based on signal strength difference and dynamic linear interpolation. Background technique [0002] With the development of mobile communication and wireless technology, location-based services are getting more and more attention. People's demand for indoor positioning information is increasing day by day. Large indoor places such as underground parking lots, logistics warehouses, mines, hospitals, prisons, archaeological sites, exhibition halls, museums, etc. need real-time positioning of people or objects in order to realize navigation, monitoring and intelligence. Management and other functions. The indoor positioning method based on radio frequency map has become one of the most important indoor wireless positioning methods in recent years because of its high positioning accuracy and simple calculation method. [0003] Traditi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/04H04W64/00
Inventor 叶阿勇杨小亮
Owner FUJIAN NORMAL UNIV
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