WiFi data-based position fingerprint database establishment and fitting method

Abstract

The invention is suitable for the technical field of WiFi data positioning. The invention discloses a WiFi data-based position fingerprint database establishment and fitting method, comprising a position fingerprint database establishing step and a fingerprint database fitting step, wherein the position fingerprint database establishing step comprises the steps of dividing a grid fingerprint database, dividing a grid region at the latitude of a to-be-divided fingerprint database region, and taking two points as diagonal lines of a rectangular region for setting to obtain a blank grid fingerprint; and the fingerprint database filling step includes: filling grids at corresponding positions with the WiFi signal intensity data accumulatively uploaded by the user and the measured WiFi signal intensity data according to signal intensity data positions. Due to the fact that the plane grid fingerprint database is adopted, the problem that the positioning accuracy is reduced due to uneven fingerprint information distribution can be effectively solved. Meanwhile, Gaussian filtering is carried out on original collected data, errors caused by data collection are reduced, and a solid foundationis laid for subsequent further improvement of indoor positioning precision.

Description

technical field [0001] The invention relates to the technical field of mobile communication and the Internet of Things, in particular to a method for establishing and fitting a location fingerprint library based on WiFi data. Background technique [0002] In recent years, the WiFi indoor positioning solution relying on indoor hotspots for positioning has attracted much attention. This positioning method has the advantages of wide indoor coverage and low deployment cost. The invention proposes an indoor location fingerprint database establishment and fitting scheme based on WiFi data. The scheme is a part of the indoor positioning system of the WiFi fingerprint database, and mainly describes the establishment and fitting process of the fingerprint database. [0003] In an indoor environment, the WiFi signal strength value received at each location is closely related to the distance from the AP (Access Point, wireless access point) and the surrounding environment. This locatio...

AI Technical Summary

Problems solved by technology

[0018] The technical problem mainly solved by the present invention is to provide a location fingerprint library establishment and fitting method based on WiFi data, the location fingerprint library establishment and fitting method based on WiFi data The combined method not only overcomes the uneven distribution of fingerprint points to build a planar grid fingerprint database, but also overcomes the defects caused by the fixed model, and improves the adaptability and positioning accuracy of the propagation model.

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