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WiFi signal fingerprint data optimization method and device

An optimization method and technology of fingerprint data, applied in the field of data processing and indoor navigation, can solve the problems of unreasonable selection of signal interpolation interval, inaccurate prediction of WiFi signal strength, limited accuracy of indoor positioning results, etc., to achieve the effect of improving signal accuracy

Active Publication Date: 2018-06-01
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention provides a method and device for optimizing WiFi signal fingerprint data to solve the current problem of inaccurate prediction of WiFi signal strength, unreasonable selection of available intervals for signal interpolation, and limited accuracy of indoor positioning results.

Method used

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  • WiFi signal fingerprint data optimization method and device
  • WiFi signal fingerprint data optimization method and device
  • WiFi signal fingerprint data optimization method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1: The embodiment of the present invention provides a method for optimizing WiFi signal fingerprint data, refer to figure 1 shown, including the following steps:

[0055] S101. For the WiFi signal coverage area, continuously plan the interpolation area according to the area growing algorithm;

[0056] S102. Calculate the WiFi signal strength of the point to be sought according to the interpolation algorithm, and count the WiFi signal strength distribution of the point to be sought and its surrounding known points;

[0057] S103. Calculate the Bhattachary coefficient between the signal strength distribution of the point to be obtained and the signal strength distribution of the surrounding known points;

[0058] S104. Analyzing the Barcol coefficient;

[0059] S105. When the analysis result of the Bhattachary coefficient is greater than or equal to a preset threshold, execute the region growing algorithm and realize interpolation.

[0060] Further, refer to...

Embodiment 2

[0104] An embodiment of the present invention provides a device for optimizing WiFi signal fingerprint data, referring to image 3 shown, including:

[0105] The planning module 31 is used for continuously planning the interpolation area according to the area growing algorithm for the WiFi signal coverage area;

[0106] Statistical module 32, for calculating the WiFi signal strength of the point to be sought according to the interpolation algorithm, and counting the WiFi signal strength distribution of the point to be sought and its surrounding known points;

[0107] Calculation module 33, used for calculating the Bhattachary coefficient of the distribution of the signal strength of the point to be obtained and the distribution of the signal strength of the surrounding known points;

[0108] The analysis module 34 is configured to analyze the Bhattachary coefficient, and when the analysis result of the Bhattachary coefficient is greater than or equal to a preset threshold, ex...

Embodiment 3

[0131] In a third aspect, an embodiment of the present invention provides a device for optimizing WiFi signal fingerprint data, including:

[0132] processor;

[0133] memory for storing processor-executable instructions;

[0134] Wherein, the processor is configured as:

[0135] For the WiFi signal coverage area, the interpolation area is continuously planned according to the area growing algorithm;

[0136] Calculate the WiFi signal strength of the point to be sought according to the interpolation algorithm, and count the WiFi signal strength distribution of the point to be sought and its surrounding known points;

[0137] Calculating the Bhattachary coefficient of the distribution of the signal strength of the point to be sought and the distribution of the signal strength of the surrounding known points;

[0138] Analyzing the Barthel's coefficient, when the analysis result of the Barthel's coefficient is greater than or equal to a preset threshold, execute the region gr...

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Abstract

The invention discloses a WiFi signal fingerprint data optimization method and device, and the method comprises the steps: continuously planning an interpolation region according to a regional growthalgorithm; calculating the WiFi signal intensity of a to-be-solved point according to an interpolation algorithm, and carrying out the statistics of the WiFi signal intensity distribution of the to-be-solved point and the surrounding known points of the to-be-solved point; calculating the Bhattacharyya coefficient of the signal intensity distribution of the to-be-solved point and the signal intensity distribution of the surrounding known points; analyzing the Bhattacharyya coefficient, executing the regional growth algorithm when the analysis result of the Bhattacharyya coefficient is greaterthan or equal to a preset threshold value, and carrying out the interpolation; changing a regional growth condition when the Bhattacharyya coefficient is less than the threshold value, and planning anew interpolation region. The method can achieve the obtaining of a WiFi fingerprint database with the higher resolution, selects a correct interpolation region according to the analysis result of theBhattacharyya coefficient, improves the precision of a WiFi dense fingerprint database, and solves problems that the inaccurate prediction of the WiFi signal intensity and the improper selection of ausable region of signal interpolation cause an indoor positioning result to be limited currently.

Description

technical field [0001] The invention relates to the technical fields of data processing and indoor navigation, in particular to a method and device for optimizing fingerprint data of WiFi signals. Background technique [0002] Due to the advantages of stable frequency, all-day working and easy signal acquisition, WiFi signal has received extensive attention and research in indoor navigation and positioning applications, and has been applied in related fields in real life. The core idea of ​​WiFi positioning technology is to use the different characteristics of WiFi signal strength at each spatial location point to construct the location characteristics of each location point, and use the positioning matching algorithm to achieve the purpose of positioning. The accuracy of WiFi signal strength is the most critical part of WiFi positioning technology. Due to the limitations of acquisition software and terrain features, the current application of WiFi positioning technology has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/024H04W4/33H04W24/08
CPCH04W24/08
Inventor 赵龙陶冶张且且
Owner BEIHANG UNIV
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