WIFI (Wireless Fidelity) positioning method and positioning system thereof

Abstract

The invention relates to a WIFI (Wireless Fidelity) positioning method and a positioning system thereof. The WIFI positioning method comprises the following steps of: arranging a WIFI positioning system comprising an access point, a dynamic label, a mobile unit, a center server and a database; generating each AP (access point) signal radio map of a reference system, and storing a database (DB); generating a newly-added TAG signal radio map of the reference system, and storing into the database (DB); on a mobile unit (MU), sampling each reference point signal SS of the reference system; according to the historical data of a sampling signal, carrying out iteration smooth filtering; on a center server LOC (Lines of Communication), obtaining the signal radio map of each reference system of the collected signal; according to an optimal algorithm, obtaining the geometric position of the sampling point; on the mobile unit (MU), finishing Kalman filtering to a moving object; and at the idle time of the center server LOC, finishing evaluating and updating the TAG position. According to the WIFI positioning method, the positioning precision of the whole positioning system can be improved so as to consider the data transmission efficiency and reliable positioning. The WIFI positioning method can be widely applied to the wireless positioning field.

Description

technical field [0001] The invention relates to a wireless positioning method and a positioning system, in particular to a WIFI positioning method and a positioning system suitable for robot mobile positioning and other occasions requiring high positioning accuracy. Background technique [0002] At present, WIFI is a wireless data communication method and has been widely used. WIFI positioning also appears along with the data communication network. In a WIFI network, the fixed location of the access point is used as a reference, and the location of the mobile device can be determined according to information such as signal strength between sending and receiving devices. WIFI positioning is especially suitable for indoor positioning, while GPS positioning is suitable for outdoor positioning. The powerful combination of the two methods expands the application range of wireless positioning technology. However, the general WIFI positioning system has the problem of low accurac...

AI Technical Summary

Problems solved by technology

However, the general WIFI positioning system has the problem of low accuracy. The main reasons are as follows: 1. Since the number of access points is deployed according to the requirements of communication, if viewed according to the requirements of positioning, the number of access points Low deployment density

2. The historical data of the positioning process is not fully utilized, and the dynamic changes of positioning information are not fully considered

3. The transmission of indoor signals is affected by many factors, and the positioning algorithm is not perfect for indoor signal processing

Therefore, WIFI positioning cannot be used in occasions that require higher precision, such as robot mobile positioning

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