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Wireless signal fingerprint database optimization updating method and device

A wireless signal and update method technology, applied in wireless communication, measuring devices, radio wave measurement systems, etc., can solve the problems of decreased positioning accuracy, low accuracy, and cumbersome steps, and achieve the effect of improving update accuracy

Active Publication Date: 2019-07-26
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method and device for optimizing and updating a wireless signal fingerprint library to solve the problems of slow update speed, cumbersome steps, low precision and decreased positioning accuracy over time.

Method used

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  • Wireless signal fingerprint database optimization updating method and device
  • Wireless signal fingerprint database optimization updating method and device
  • Wireless signal fingerprint database optimization updating method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1: The embodiment of the present invention provides a method for optimizing and updating the wireless signal fingerprint database. Refer to figure 1 shown, including the following steps:

[0058] S101. According to the existing signal strength of the fixed reference point, use N models to calculate the signal strength of the unknown point respectively, and compare it with the signal strength of the existing point in the fingerprint library corresponding to the unknown point to obtain the weight of the N models; : N≥2;

[0059] S102. Determine the weight relationship between the weights of the N models and the signal strength of the fixed reference point according to the existing signal strength of the fixed reference point;

[0060] S103. Calculate the signal strength of the unknown point online according to the signal strength collected in real time at the fixed reference point, calculate the weight of each model online adaptively according to the weight re...

Embodiment 2

[0118] An embodiment of the present invention provides a device for updating a wireless signal fingerprint library, referring to image 3 shown, including:

[0119] Acquisition module 31, is used for constructing the signal strength of all point collection of prior fingerprint database and the signal strength of real-time collection fixed reference point;

[0120] The statistics module 32 is used for N models to predict the signal strength of the unknown point by the signal strength of the fixed reference point;

[0121] The analysis module 33 is used to compare and analyze the difference between the signal strength of the unknown point calculated according to the model and the signal strength in the fingerprint database corresponding to the unknown point, and obtain the weights of N models;

[0122] A determining module 34, configured to determine the weight relationship between the weights of the N models and the signal strength of the fixed reference point according to the...

Embodiment 3

[0127] A device for optimizing and updating a wireless signal fingerprint library, comprising:

[0128] processor;

[0129] memory for storing processor-executable instructions;

[0130] Wherein, the processor is configured as:

[0131] According to the existing signal strength of the fixed reference point, use N models to calculate the signal strength of the unknown point respectively, and compare with the signal strength of the existing point in the fingerprint database corresponding to the unknown point to obtain the weight of the N models; where: N ≥2;

[0132] Determine the weight relationship between the weights of the N models and the signal strength of the fixed reference point according to the existing signal strength of the fixed reference point;

[0133] Calculate the signal strength of the unknown point online according to the signal strength collected in real time at the fixed reference point, calculate the weight of each model online adaptively according to th...

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Abstract

The invention discloses a wireless signal fingerprint database optimization updating method and device, and the method comprises the steps: adaptively determining the normalized weights of N models according to the signal intensity received by a fixed reference point in real time, and achieving the adaptive updating of the wireless signal intensity through the adaptive fusion of the N models. A weight coefficient is introduced on the basis of a single fingerprint updating model, adaptive weighted fusion of multiple models in different environments can be realized, and a more accurate fingerprint calculation result is obtained. Similarly, the device can improve the signal intensity calculation precision, thereby solving the problems of poor signal intensity prediction result of a single model and poor fingerprint positioning precision caused by environmental change at present.

Description

technical field [0001] The invention relates to the technical field of data processing recovery and positioning, in particular to a method and device for optimizing and updating a wireless signal fingerprint library. Background technique [0002] Because wireless devices, such as WiFi, Bluetooth, and Zigbee, have the advantages of being commonly used and easy to install, they have been deployed in almost every corner of the city. The signal it emits covers most of the indoor areas and some outdoor areas. Using its signal characteristics for positioning has received extensive attention and research in the field of indoor navigation and positioning, and has achieved preliminary results. The fingerprint library positioning technology mainly uses the device to have different signal strength sequences at different spatial points, so that each spatial location point has its own unique characteristics. By storing the signal strength sequence of each point, the signal fingerprint d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00G01S5/02
CPCG01S5/0278H04W64/006
Inventor 赵龙陶冶
Owner BEIHANG UNIV