An Indoor Positioning Method Based on 3D Code Mapping

An indoor positioning and three-dimensional code technology, which is applied in the direction of location information-based services, specific environment-based services, space transmission diversity, etc., can solve the problems of complex positioning methods, reduce average transmission power, reduce path loss, and facilitate engineering Achieved effect

Active Publication Date: 2021-03-23
西安茂德通讯科技有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to provide an indoor positioning method based on three-dimensional code mapping, which solves the complex problem of existing positioning methods, and realizes indoor real-time spatial positioning by using distributed antennas combined with beam matching methods of three-dimensional code mapping

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  • An Indoor Positioning Method Based on 3D Code Mapping
  • An Indoor Positioning Method Based on 3D Code Mapping
  • An Indoor Positioning Method Based on 3D Code Mapping

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Embodiment 1

[0046] An indoor positioning method based on three-dimensional code mapping, which is aimed at indoor positioning systems based on distributed antenna groups, such as Figure 5 Shown is a schematic structural diagram of the distributed antenna group-based indoor positioning system of the present invention, the system includes: a baseband processing unit (BBU, Building Base band Unite), a distributed antenna group (Ant) and a mobile terminal Q. Among them, the distributed antenna group is controlled by Ant 1 、Ant 2 、Ant 3 and Ant 4 It consists of four antenna groups, and the BBU is connected to the four antenna groups in the indoor distributed antenna group through feeders.

[0047] Antenna set Ant k (k=1,2,...,4, k is the serial number of the antenna group) all adopt planar arrays, and the number of array elements is M k ×N k ,M k is the number of rows of the planar antenna array, and M k =4(k=1,2,...,4),N k is the number of columns of the planar antenna array, and N ...

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Abstract

The invention discloses an indoor positioning method based on three-dimensional code mapping. The method comprises the following steps: (S100) enabling a base station to estimate a channel according to a received uplink signal, generate a feature vector matrix of an antenna group Antk, map the feature vector matrix of the antenna group Antk into a three-dimensional code, and match the three-dimensional code to obtain an approximate code word three-dimensional code, so as to obtain a precoding matrix W of the antenna group Antk; (S200) carrying out beam forming on a base station transmitting signal according to the precoding matrix W; (S300) obtaining distances lk between the mobile terminal and four antenna groups Antk which are not on the same plane through a distance loss model, obtaining four balls with an antenna group Anti k as a circle center and a distance lk as a radius, establishing a three-dimensional space spherical surface equation set, solving by using a corrected maximum likelihood method to obtain a three-dimensional coordinate, and correcting a z value of the three-dimensional coordinate to obtain an estimated value of the three-dimensional coordinate of the mobile terminal. According to the method, the indoor real-time spatial positioning is realized by utilizing the distributed antenna and combining a beam matching mode of three-dimensional code mapping.

Description

technical field [0001] The invention relates to an indoor positioning method, in particular to an indoor positioning method based on three-dimensional code mapping. Background technique [0002] With the rapid increase of data services and multimedia services, people's demand for positioning is increasing day by day. Such as: quickly find safe exits and elevators in airport halls, exhibition halls and public places; find parking spaces, parking and time billing indoors; stores push promotional activities, queuing appointments and payment services to customers based on their locations; large buildings Emergency evacuation, public safety and post-disaster rescue, etc. [0003] At present, other methods of indoor positioning have been researched and designed, such as using beam scanning to achieve positioning. Chinese patent CN201710697495.1 discloses the use of multi-antenna tags combined with beam scanning to achieve indoor positioning. However, the downtilt angle of the an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/02H04W4/33H04W64/00H04B7/0456H04B7/06
CPCH04B7/0456H04B7/0617H04W4/023H04W64/00H04W4/33
Inventor 王衍文王渭森马晓璠雷霄龙王世芳周锋马明娟
Owner 西安茂德通讯科技有限公司
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