Indoor positioning fusion method based on UWB and Bluetooth technologies

Abstract

The invention discloses an indoor positioning fusion method based on UWB and Bluetooth technologies. According to the method, the advantages of two indoor positioning schemes are combined, a possibleregion of an estimated position is limited by use of the characteristic that a UWB range error is small, and the solving range is reduced; compared with the traditional method of estimating a positionaccording to a range, an RSSI value of a Bluetooth signal is directly utilized to obtain probability distribution in the solving region through Bayesian reasoning so as to solve the position, error introduction caused when the RSSI signal is calculated into a distance is avoided, and positioning precision is improved; the positioning precision of the UWB technology can be obtained in most cases just through one UWB base station and two Bluetooth base stations, and compared with a UWB positioning scheme which adopts four UWB base stations, the cost can be lowered to one quarter of original cost; and a particle swarm optimization algorithm is utilized to solve an extreme value under inequation constraint, a locally optimal solution can be obtained under the situation that the minimum valuedeviates from a real solution because an RSSI measured value error is large, and the method has a better actual use effect.

Description

technical field [0001] The invention belongs to the technical field of navigation, guidance and control, and in particular relates to an indoor positioning fusion method based on UWB and bluetooth technology. Background technique [0002] In modern society, with the development of information such as communication and network. With the rapid development of technologies such as Global Positioning System (GPS) and Wireless Sensor Networks (WSNs), location-aware computing and location-based services (Location Based Services, LBS) are becoming more and more important in real life. important. The emergence of positioning technology has greatly facilitated people's lives, and its influence has extended to all aspects of military, science and technology, and people's ordinary life. The help of indoor positioning to people's daily life has also made it more and more popular in various fields. of favor. For example, information push based on location services in supermarkets helps...

AI Technical Summary

Problems solved by technology

However, the existing single indoor positioning solutions are all based on a single positioning technology. In order to achieve high-precision positioning, it is necessary to pay a high economic cost, resulting in the existing technologies not being well used in practical applications.

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