AP selection indoor positioning method of path loss model

Abstract

The invention discloses an AP selection indoor positioning method of a path loss model, which comprises the following steps: (1) offline data collection; (2) establishment of an initial fingerprint database; (3) division of sub-areas of the fingerprint database; (4) effective selection of the AP. Although the AP selection method based on the path loss model can effectively select the APs that havesimilar contributions to positioning, the stability of the AP is not considered, and the Fisher criterion can achieve effective selection of the stable AP. Therefore, the AP selection indoor positioning method of the path loss model in the present invention introduces the Fisher criterion into the AP selection method based on the path loss model, thereby making up for the problem of insufficientconsideration for selection of the stable AP, so that the constructed wireless map is more reliable, thereby improving the positioning accuracy.

Description

technical field [0001] The invention relates to the technical field of indoor positioning, in particular to an indoor positioning method for AP selection based on a path loss model. Background technique [0002] In recent years, the rapid development of wireless communication technology has greatly promoted location-based services based on location technology. It is very convenient. It has a wide range of applications, such as hospital inventory, tracking of medical resources, navigation tools used by firefighters in unknown indoor environments, and various commercial positioning services, such as taxi-hailing software, food delivery software, group buying software, etc. that require accurate location information . Therefore, positioning technology has been paid more attention by researchers. [0003] Traditional WLAN indoor positioning research generally selects a specific scene, selects a fixed number of APs to collect and locate RSS data, and the number of APs received...

AI Technical Summary

Problems solved by technology

Whether the AP is effectively selected seriously affects the accuracy of indoor positioning

In terms of AP selection, the challenges faced by WLAN-based indoor positioning are that APs do not necessarily provide independent information, and fingerprints can be correlated with each other; APs have limited coverage and may not be used in all RPs in the location area. The signal of the far AP is weak, which may reduce the positioning accuracy

[0004] At present, most of the indoor positioning technologies based on WLAN do not consider optimizing the AP selection strategy to improve the positioning accuracy. Through research on some existing scientific and technological literature, it is found that most of the literature is in the case of measuring all APs or selecting a set A fixed number of APs for positioning

However, the existing AP selection methods do not combine stability with uniqueness based on path loss.

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