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Indoor WLAN fingerprint location method based on ap ID filtering and Kalman filtering

A Kalman filter and fingerprint positioning technology, applied in the field of navigation and positioning, can solve the problems of slow speed and low positioning accuracy, and achieve the effects of filtering out environmental interference, fast and accurate matching and positioning, and improving adaptability

Inactive Publication Date: 2017-06-06
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low positioning accuracy and slow speed in WLAN fingerprint positioning technology, the present invention proposes an indoor WLAN fingerprint positioning method based on AP ID filtering and Kalman filtering

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  • Indoor WLAN fingerprint location method based on ap ID filtering and Kalman filtering
  • Indoor WLAN fingerprint location method based on ap ID filtering and Kalman filtering
  • Indoor WLAN fingerprint location method based on ap ID filtering and Kalman filtering

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Embodiment Construction

[0065] Further description will be made below in conjunction with drawings and embodiments.

[0066] The structural block diagram of the application system of the present invention is as figure 1 As shown, it includes: mobile phone platform 1, NEMO acquisition software 2, computer 3, and monitor 4. Use the built-in wireless network card of the Android phone to collect signals, and use the Nemo software installed on the phone to record the RSS, AP ID and other information of all AP access points with peripheral signals between -25dB and -120dB, and collect them every 1 second to generate log file, and then export the data file in .csv format and upload it to the computer. Through the WLAN location fingerprint positioning software developed on the Windows XP system, the two stages of offline database building and online matching in the process of indoor WLAN location fingerprint location are simulated, and the AP ID full database, partition AP ID database and location fingerpri...

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Abstract

The invention discloses an indoor WLAN fingerprint positioning method based on AP ID filtering and Kalman filtering, comprising steps of partitioning an area to be positioned into a plurality of small subzones and quickly determining zones through the partitioned AP ID library screening, enabling the system to automatically adapt to the condition that few AP are changed through AP ID library filtering, processing WLAN signal fingerprint through Kalman filtering algorithm and filtering random jamming of locating environment. The invention realizes fast and accurate matching position in the process of WLAN fingerprint positioning and solves the problems that the matching speed and positioning accuracy are low in the traditional WLAN fingerprint positioning method. Through the AP ID partitioned filtration, the speed of fingerprint matching is greatly improved, in the meantime, the system is enabled to automatically adapt the condition that few APs are changed. And thus the repeated establishment of database is avoided. Through the Kalman filtering algorithm, the self-adaptive capability of the system for the random jamming is enhanced and the positioning accuracy is improved.

Description

technical field [0001] The invention belongs to the field of navigation and positioning. It relates to an adaptive and rapid indoor WLAN fingerprint positioning method realized by using computer technology, digital signal processing technology, database technology and the like. This method can realize self-adaptive and rapid positioning to environmental disturbance and AP (Access Point, wireless signal access point) quantity change in the process of WLAN fingerprint positioning. Background technique [0002] Indoor is the place with the most intensive human activities, so the research on indoor location-based services is of great significance. Due to the characteristics of multipath, non-line-of-sight, and complex and changeable indoor environments, GPS and other widely used outdoor positioning technologies cannot be applied indoors. WLAN-based position fingerprint positioning technology has become the focus of indoor positioning technology research in recent years because...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04W84/12
Inventor 张会清许建波
Owner BEIJING UNIV OF TECH