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Android device wireless fidelity (WiFi) indoor locating method based on position fingerprint identification algorithm

A fingerprint identification and indoor positioning technology, applied in positioning, measuring devices, instruments, etc., can solve problems such as low positioning accuracy, signal strength attenuation, and inability to complete positioning, and achieve rapid response, reduce errors, and avoid mismatches.

Inactive Publication Date: 2013-07-10
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
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Problems solved by technology

[0013] In order to solve the above problems, when the terminal receiver works in a city with dense buildings or indoors, the signal strength is greatly attenuated due to the influence of buildings, resulting in low positioning accuracy or even failure to complete positioning. The present invention discloses a An Android (Android) device-side WiFi indoor positioning method based on the location fingerprint recognition algorithm, which is improved on the basis of the traditional fingerprint recognition algorithm, can accurately locate the position of the terminal receiver, and responds quickly

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  • Android device wireless fidelity (WiFi) indoor locating method based on position fingerprint identification algorithm
  • Android device wireless fidelity (WiFi) indoor locating method based on position fingerprint identification algorithm
  • Android device wireless fidelity (WiFi) indoor locating method based on position fingerprint identification algorithm

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Embodiment Construction

[0039] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0040] The layout of the experimental area is as follows: figure 1 As shown, five wireless signal access points (that is, APs, labeled A to E) are placed in an area of ​​8m*5.5m. All APs are active RFID, the operating frequency is 2.442GHz, the sensitivity is -118dBm, and the minimum transmit power is -24dBm. Use the WirelessMon software installed on the computer to scan the signal strength of the AP.

[0041] The WiFi indoor positioning method provided by the present invention is divided into two processes of training and positioning, and the training steps are as follows: figure 2 As shown, the description is as follows:

[0042] Step 1: Divide 204 referenc...

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Abstract

The invention discloses an Android device wireless fidelity (WiFi) indoor locating method based on a position fingerprint identification algorithm. The Android device WiFi indoor locating method based on the position fingerprint identification algorithm aims at solving the problems that when a terminal receiver works in a city with dense building clusters or indoors, signal strength is greatly reduced due to influence by buildings, thus locating accuracy is low and location even can not be completed. Based on the foundation of the traditional position fingerprint identification algorithm, a k-nearest neighbor (KNN) matching algorithm and a coordinate computing method based on weight are adopted so that the position of a point to be measured is obtained, errors brought by signal fluctuation is effectively reduced, the position of the terminal receiver can be accurately located, and reaction is fast. Compared with a tradition indoor locating method, the Android device WiFi indoor locating method based on the position fingerprint identification algorithm can accurately locate the position of a requester in the condition of a complex environment, and is fast in reaction, efficient, accurate and especially suitable for indoor position location of an Android device terminal.

Description

technical field [0001] The invention belongs to the technical field of indoor positioning and navigation, and in particular relates to a method for realizing accurate indoor positioning of an Android device by using indoor wireless positioning technology. Background technique [0002] Target location information plays an important role in various occasions, such as vehicle navigation, mine underground personnel positioning, medical care object positioning, construction site management, etc. At present, the most widely used positioning system is undoubtedly the "Global Positioning System (GPS)". As the most widely used satellite navigation and positioning technology in the world, GPS has been promoted and applied in many fields. Users need to rely on a handheld receiver or install a receiver on a car or yacht to receive satellite signals. After receiving the signal from the satellite, the receiver performs some calculations to determine your position. A GPS receiver knows wh...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00G01S5/02
Inventor 马廷淮陆颍华郑钰辉田伟姚永雷
Owner NANJING UNIV OF INFORMATION SCI & TECH
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