Indoor positioning method based on wireless local area network

A wireless local area network and indoor positioning technology, applied in wireless communication, network topology, electrical components, etc., can solve the problems of decreased positioning accuracy and inaccuracy, and achieve the effect of eliminating errors and improving positioning accuracy and positioning accuracy

Active Publication Date: 2014-06-25
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies in the existing indoor local area network positioning technology, such as the decrease in positioning accuracy and inaccuracy caused by multipath effects and non-line-of-s...

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  • Indoor positioning method based on wireless local area network
  • Indoor positioning method based on wireless local area network
  • Indoor positioning method based on wireless local area network

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Embodiment Construction

[0025] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0026] The fingerprint positioning method in the local area network-based indoor positioning method is divided into two stages: the offline stage and the positioning stage. It mainly uses the data matching of signal strength value to achieve: in the offline stage, measure the signal strength of the signal source of the specified physical address at each reference position point, store the information in the database in advance, and construct a different reference position In the positioning phase, measure the signal strength of the signal source at the specified physical address at the test location, and then use the measured data to match the fingerprint database, so as to obtain the optimal result and determine the positioning result. Representative matching methods include K-Nearest Neighbor law and neighbor law. The K nearest neighbor method and th...

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Abstract

The invention discloses an indoor positioning method based on a wireless local area network, and belongs to the technical field of intersection of a wireless network technology and a pattern recognition technology. The method includes the steps that according to the rule that signal variance is reduced along with enhancement of signal strength, an existing fingerprint positioning method based on the local area network is improved, when a fingerprint distance is calculated, the variance of received signal strength of all wireless signal sources is estimated according to test positions, and the influence on the fingerprint distance calculation result by the received signal strength of the different signal sources is corrected correspondingly. The influence of error signal strength values caused by a multipath effect and non-line-of-sight factors can be effectively reduced, precision and accuracy of indoor positioning are improved, and compared with an existing method, the indoor positioning method is higher in robustness and stability.

Description

technical field [0001] The invention discloses an indoor positioning method based on a wireless local area network, and belongs to the technical field where wireless network technology and pattern recognition technology intersect. Background technique [0002] With the development of science and technology and society, whether it is indoor or outdoor, people's demand for location-based services is more and more extensive, which makes efficient positioning technology become the research focus of current researchers. GPS can provide accurate positioning and navigation functions outdoors; however, it is not suitable for indoors due to the influence of accuracy and various environmental factors. Currently, indoor positioning methods mainly include infrared positioning, radio frequency identification positioning, and wireless local area network positioning. Indoor positioning has broad application prospects in airports, hospitals, shopping malls, museums and other public indoor ...

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Application Information

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IPC IPC(8): H04W24/02H04W64/00H04W84/12
Inventor 徐小龙唐瑀袁歆悦邹吉石峰王新珩马玲玲
Owner NANJING UNIV OF POSTS & TELECOMM
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