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A Fingerprint Positioning Method Based on Orientation Sensor and WLAN Network

A direction sensor and fingerprint positioning technology, which is applied in the field of navigation and positioning, can solve the problems of poor precision of fingerprint positioning methods, achieve the effects of improving accuracy, reducing positioning interference, and improving positioning accuracy

Active Publication Date: 2016-05-11
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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  • Description
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Problems solved by technology

[0005] However, due to the antenna directivity of the WLAN terminal, the user's own occlusion, etc., even at the same location, the fingerprint strength measured in different directions is also very different. The accuracy of the positioning method is poor

Method used

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  • A Fingerprint Positioning Method Based on Orientation Sensor and WLAN Network
  • A Fingerprint Positioning Method Based on Orientation Sensor and WLAN Network
  • A Fingerprint Positioning Method Based on Orientation Sensor and WLAN Network

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Embodiment Construction

[0024] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0025] Firstly, two processes of offline collection and online positioning in existing typical WLAN-based fingerprint positioning methods are introduced.

[0026] Offline acquisition: In this process, the positioning area is first divided into grids, and each grid point is called a reference point. It is assumed that the positioning area is divided into M reference points; on this basis, each reference point is For fingerprint collection, the collected fingerprints include: signal strength value and the position of the reference point, which can be written as: x i ,y i ,z i , where N is the number of APs in the positioning area, i is the reference point label, i=1, 2, ..., M, RSSI is the signal strength value, wherein for invisible APs (that is, the signal strength is very weak, in this The reference point cannot be scanned), and the RSSI value of thi...

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Abstract

The invention discloses a fingerprint positioning method based on a direction sensor and a WLAN network. A fingerprint base is generated by measuring AP signal strength received by reference points in different directions in an off-line period, a direction angle of a terminal is acquired by means of the direction sensor arranged in the WLAN terminal in an on-line period, matching is performed by means of the signal strength received in the direction proximate to the direction angle in the fingerprint base, difference of signal strength caused by different directions is reduced, and therefore, positioning precision is improved. Meanwhile, body covering conditions are judged during positioning, matching of the signal strength of APs in a body covering area is ignored, positioning interference caused by body covering is reduced, and positioning precision is improved further.

Description

technical field [0001] The invention relates to the field of navigation and positioning, in particular to a fingerprint positioning method based on a direction sensor and a WLAN network. Background technique [0002] In recent years, location-based services (LBS, Location Based Services) are widely considered to be an important trend in the development of the information industry. At present, the location acquisition in LBS mainly relies on the GNSS system represented by GPS. GNSS has high positioning accuracy and global 24-hour availability, and the advantages of not being easily affected by weather and other factors, but the satellite communication system itself has the inherent disadvantages of weak signal and easy to be blocked, which greatly limits the application scenarios of GNSS, such as in urban streets and under viaducts In other areas, its positioning performance will be severely limited, and it will almost completely fail in indoor and underground areas. Therefo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00
Inventor 魏东岩张晓光来奇峰公续平李祥红陈夏兰徐颖袁洪
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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