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An Indoor Positioning Map Construction Method Based on Trajectory Correction and Fingerprint Improvement

An indoor positioning and fingerprint positioning technology, which is applied to services based on location information, services based on specific environments, instruments, etc., can solve the problems of time-consuming and labor-intensive indoor positioning maps and inability to describe the degree of reliability.

Active Publication Date: 2020-09-08
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides an indoor positioning map construction method based on trajectory correction and fingerprint improvement, thereby solving the time-consuming and labor-intensive construction process of the existing indoor positioning map and the inability to describe its reliability. degree technical issues

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  • An Indoor Positioning Map Construction Method Based on Trajectory Correction and Fingerprint Improvement
  • An Indoor Positioning Map Construction Method Based on Trajectory Correction and Fingerprint Improvement

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Embodiment Construction

[0057] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0058] The present invention provides an indoor positioning map construction method based on trajectory correction and fingerprint improvement. While building an indoor radio map whose fingerprint reliability can be described by crowdsourcing trajectory, the crowdsourcing trajectory is corrected by using the established radio map, synchronously Solve the problems of time-consuming and labor-inte...

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Abstract

The invention discloses an indoor positioning map construction method based on trajectory correction and fingerprint improvement. The method comprises the following steps: dividing a target area intoa plurality of grids which are similar in areas and not overlapped, and the acquired Wi-Fi and sensor information of a pedestrian trajectory sample is used for constructing an indoor positioning map.Firstly, the original trajectory information is used for constructing the indoor positioning map, each grid in the map has a supporting set-grid structure, and besides the data such as RSS, the structure also comprises adaptability of the supporting set data storage confidence degree and fitting degree of the fingerprint AP reliability degree. For the surplus trajectory, a selectable filter schemeis used, the established map is used for fingerprint positioning the trajectory, and by combining the original trajectory information, a corrected trajectory can be obtained and can be used for improving the map. By adopting the method, while the indoor positioning map with the reasonable positioning precision is obtained, the correction of the trajectory is realized, and the trajectory is closerto an actual trajectory effect.

Description

technical field [0001] The invention belongs to the field of communication and wireless network, and more specifically relates to an indoor positioning map construction method based on trajectory correction and fingerprint improvement. Background technique [0002] With the rapid popularization of mobile devices and mobile networks, indoor positioning plays an increasingly important role in many industrial and commercial applications (such as indoor navigation, indoor trajectory tracking, location-based advertising information push, etc.). However, in an indoor environment, since the line-of-sight transmission condition is not satisfied, the positioning performance of the Global Positioning System (GPS) is greatly reduced, and the GPS signal is rapidly attenuated in the indoor environment. For this reason, in the past two decades, a number of indoor positioning technologies based on radio frequency identification, Bluetooth, ultrasonic and Wi-Fi have been proposed. Among th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/20H04W4/029H04W4/33
CPCG01C21/206H04W4/029H04W4/33
Inventor 王邦李文松叶炎珍
Owner HUAZHONG UNIV OF SCI & TECH
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