Indoor positioning map construction method based on trajectory correction and fingerprint improvement

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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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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