Unlock instant, AI-driven research and patent intelligence for your innovation.

A Fingerprint Information Location Method Based on Wireless Signal Strength

A technology of wireless signal strength and fingerprint information, which is applied in wireless communication, services based on specific environments, positioning, etc., can solve the problems of high fluctuation rate of results, limited labor and time costs, and inaccurate predictions, and achieve the reduction of average positioning error , Guaranteed prediction accuracy, and the effect of expanding the fingerprint library

Active Publication Date: 2022-04-29
JIANGNAN UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used prediction methods include spatial interpolation and matrix filling. As a typical spatial interpolation method, the inverse distance weighted (Inverse Distance Weighted, IDW) algorithm is simple in logic, and the position weight is only negatively correlated with the physical distance. The prediction of the scene is not accurate; and the Kriging algorithm needs to fit the variation function related to the scene before the prediction, which brings the defects of complex calculation and high volatility of the result
In order to balance the computational complexity, Le Yanfen used universal Kriging interpolation method to preprocess the location fingerprint, but the reduced labor and time costs are limited, and the construction accuracy is greatly affected by the variation function

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Fingerprint Information Location Method Based on Wireless Signal Strength
  • A Fingerprint Information Location Method Based on Wireless Signal Strength
  • A Fingerprint Information Location Method Based on Wireless Signal Strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A method for locating fingerprint information based on wireless signal strength according to this embodiment includes the following steps:

[0053] Step 1. Construct the system model, and adopt the improved Latin hypercube sampling method to construct sampling samples in the positioning scene by using the dual beacon mechanism, and select a certain proportion of primary beacon points and secondary beacon points;

[0054] Step 2, collect the received signal strength of the main beacon point, the fingerprint information of the main beacon point is composed of the received signal strength and the position coordinates of the main beacon point;

[0055] Step 3, using the inverse distance weighting method to perform interpolation to obtain the received signal strength of the secondary beacon point, and the obtained received signal strength and the position coordinates of the secondary beacon point form the fingerprint information of the secondary beacon point;

[0056] Step 4...

Embodiment 2

[0082] In order to evaluate the performance of the positioning method of the present invention, the experimental environment is a certain classroom. Experimental scene such as image 3 As shown, the total area of ​​the positioning area is 9m×7m, and the distance between fingerprint points is d 0 =1m, the total number of fingerprint points is N=80, and the room contains 1=12 iBeacon bluetooth nodes as wireless access points (APs), which are marked as APs 1 ,AP 2 ,...,AP 12 . In order to analyze the error between the location fingerprint library established by the present invention and the actual fingerprint library, the present invention first adopts the full sampling method to construct the location fingerprint library, and selects the Android mobile phone as the collection terminal to perform the received signal strength (RSS) value of all beacon points in the positioning area. collection. At the same time, considering the time-varying nature of RSS data, in order to ens...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a fingerprint information positioning method based on wireless signal strength. According to the positioning method of the present invention, a double beacon mechanism is adopted, and an improved Latin hypercube sampling method is used to determine the positions of a certain proportion of primary and secondary beacon points, and the primary and secondary beacon points are collected. The signal strength of the beacon point is used as its fingerprint information, and the signal strength of the secondary beacon point is estimated by the inverse distance weighting method, and the radial basis neural network model (RBF model) is used for interpolation to complete the expansion of the fingerprint library. According to a fingerprint information positioning method based on wireless signal strength according to the present invention, under the premise of ensuring the accuracy, the lowest sampling cost is obtained; the radial basis neural network interpolation model is used to expand the fingerprint library, and after the actual scene test, in On the premise of ensuring the positioning accuracy, the method of the present invention expands the fingerprint database by 140%, and through experimental verification, the average positioning error is reduced by more than 12% compared with the existing method.

Description

technical field [0001] The invention relates to a fingerprint information positioning method based on wireless signal strength, and belongs to the technical field of indoor positioning. Background technique [0002] With the advancement of communication technology, research on indoor location-based services has developed rapidly. Affected by the limitation of GPS work on firmware configuration constraints, the fingerprint positioning method based on signal energy has become an important direction of indoor positioning technology research. The fingerprint positioning method avoids the difference of signal carriers and the distribution of interference sources, but the positioning accuracy is inevitably affected by the speed and efficiency of offline fingerprint database construction. [0003] There are various ways to construct the fingerprint library for indoor positioning, such as full sampling, crowdsourcing and prediction. The full sampling method is to plan the location...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04W4/33G01S5/02G06N3/04
CPCH04W64/006H04W4/33G01S5/0252G06N3/045
Inventor 秦宁宁吴忆松
Owner JIANGNAN UNIV