Positioning correction method and positioning server combining wi-fi fingerprint and satellite positioning

Abstract

The invention discloses a positioning correction method combining a Wi-Fi fingerprint with satellite positioning, and a positioning server. The method comprises the steps of acquiring fingerprint information of all Wi-Fi nodes scanned by a to-be-positioned terminal, wherein the fingerprint information of each Wi-Fi node comprises a position where the Wi-Fi node is located, the signal strength of the Wi-Fi node and / or floor information of a floor where the Wi-Fi node is located; computing the positions of weighted central points of all the Wi-Fi nodes according to the fingerprint information ofall the Wi-Fi nodes; computing a positioning offset according to the satellite positioning accuracy of the to-be-positioned terminal; computing the position of a harmonic positioning point accordingto the position of the satellite positioning point of the to-be-positioned terminal, the positions of the weighted central points and the positioning offset to serve as a positioning result of the to-be-positioned terminal, wherein the harmonic positioning point is positioned in a connection line between the satellite positioning point and the weighted central point, and the distance between the harmonic positioning point and the satellite positioning point is the value of the positioning offset. Therefore, the positioning error can be reduced, and the positioning accuracy can be improved.

Description

technical field [0001] The invention relates to the technical field of indoor positioning, in particular to a positioning deviation correction method and a positioning server combining Wi-Fi fingerprints and satellite positioning. Background technique [0002] In the real-time positioning of electronic equipment, the following four methods are generally used in the industry: (1) positioning method based on satellite; (2) positioning method based on base station information; (3) positioning method based on Wi-Fi information; 4) A positioning method based on Bluetooth information. [0003] In outdoor positioning scenarios, positioning methods based on satellite and base station information are mostly used in the industry. The outdoor positioning accuracy of these positioning methods can be accurate to the meter level; Affected, there will be an average error of more than 30 meters between the location collected by the device through GPS and the actual location of the user. A...

AI Technical Summary

Problems solved by technology

[0004] However, in practice, it has been found that when the Wi-Fi signal propagates, due to factors such as obstruction, signal reflection, refraction, time decay, and device orientation, the signal is prone to random changes during the propagation process, and the confidence of the signal is low. As a result, the positioning accuracy of these positioning methods is not ideal, there are still large positioning errors, and it is difficult to meet the positioning accuracy requirements of indoor navigation and other operations

Images