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Positioning method and system in WiFi environment

A positioning method and technology of a positioning system, applied in electrical components, wireless communication, etc., can solve problems such as decreased positioning accuracy, achieve the effect of avoiding manual labor and improving system robustness

Active Publication Date: 2010-06-16
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods in the prior art all cause the obvious decline of positioning accuracy

Method used

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  • Positioning method and system in WiFi environment
  • Positioning method and system in WiFi environment
  • Positioning method and system in WiFi environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0053] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0054] In one example, figure 1 The detected signals in the shown WiFi environment are shown in Table 1.

[0055]

AP1

AP2

AP3

AP4

AP5

AP6

AP7

L4&Train@t1

-69

-52

-49

-56

-58

-68

-65

L4&Train@t3

-70

-55

-48

-49

-58

-68

-58

L4&Train@t19

-61

-61

-43

-60

-60

-76

-72

L4&Test@t1

-65

-59

-50

-57

-61

L5&Train@t1

-60

-56

-37

-56

-62

-68

-63

L5&Test@t1

-52

-54

-30

-58

-66

[0056]

AP1

AP2

AP3

AP4

AP5

AP6

AP7

L100&Train@t1

-80

-72

-72

-39

-46

-67

-56

L100&Test@t1

-72

-62

-59

-41...

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Abstract

The invention relates to a positioning method and a system in a WiFi environment. The method comprises the following steps of: 1, carrying out position partition on the area of the WiFi environment, collecting the signal strength of all positions under the condition that all information sources are not missing and constructing a mapping model between the signal strength and a position label; 2, collecting the signal strength of part of positions under a condition that part of information sources are missing, and solving a regression function by using a current regularization method according to the collected signal strength of all positions under the condition that all information sources are not mising and the collected signal strength of part of positions under the condition that part of information sources are missing; and 3, detecting the signal strength of the information source received by a position to be positioned and detected in the test phase, substituting the signal strength to the regression function, calculating the supplement signal strength corresponding to the information source with the signal strength which is not received on the position to be positioned, and calculating a position label by the mapping model according to the received signal strength and the supplement signal strength. The invention can improve the precision of positioning in the WIFi environment.

Description

technical field [0001] The invention relates to the field of positioning, in particular to a positioning method and system in a WiFi environment. Background technique [0002] With the development of modern communication technology and the popularization of computing technology, the requirements for positioning are no longer limited to outdoors, and the demand for Indoor-Location-Aware Computing (Indoor-Location-Aware Computing) is also increasing, such as in airports, large shopping malls, etc. navigation, meeting guide, resource search, positioning of underground staff, monitoring of the elderly and children, etc. The GPS (Global Positioning System) based on satellite communication is currently the most widely used positioning technology. It uses the arrival time of signals from four different satellites to estimate the position through the GPS receiver, so as to provide close to global positioning coverage services. The good positioning accuracy of the GPS system makes i...

Claims

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Application Information

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IPC IPC(8): H04W24/04H04W64/00
Inventor 陈益强朴松梅董芳芳刘军发
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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