An Indoor Positioning Method Based on 3D Beam

Abstract

An indoor positioning method based on environmental backscattering, comprising the following steps: the first step, the radio frequency source RFs transmits a signal: the label includes four or more any three labels that are not in the spatial position of the same plane; the second step, Environmental backscattering of the tag: the tag receives the radio frequency source signal RFs and transmits it to the mobile terminal Q through backscattering; the third step, the mobile terminal Q detects and locates the received tag signal: take the signal strength RSSI value The largest four labels, denoted as T a ’, T b ’, T c ’ and T d '; In the fourth step, the four coordinates can determine a unique triangular pyramid, and the unique location coordinates (x, y, z) of the mobile terminal Q can be determined through the triangular pyramid. The invention improves the useful signal receiving power of the target, increases the coverage space, has better anti-multipath effect, saves the number of labels arranged, and reduces the cost of the positioning device.

Description

technical field [0001] The invention relates to the technical field of space positioning, in particular to an indoor positioning method based on three-dimensional beams. Background technique [0002] With the rapid increase of data services and multimedia services, people's demand for positioning is increasing. Especially in complex indoor environments, such as airport halls, supermarkets, libraries, underground parking lots, etc., it is often necessary to determine whether the mobile terminal or its Indoor location information of holders, facilities and objects. Most of the current positioning algorithms are only researched on wireless two-dimensional networks. However, in practical applications, wireless network nodes are often in a three-dimensional environment. In these cases, it is necessary to provide three-dimensional position information of nodes. Researchers have proposed many radio frequency-based Recognized indoor positioning solutions. [0003] 1) Use the combi...

AI Technical Summary

Problems solved by technology

However, the downtilt angle of the antenna in the vertical direction in the two-dimensional beam is fixed, only using the airspace resources in the horizontal direction, and the energy concentration is not high enough, thus limiting the coverage

[0006] In summary, none of the above methods is suitable for indoor positioning with complex environments, precise positioning, and high real-time requirements.

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