An Indoor 3D Positioning Method Based on Distributed Antennas

A distributed antenna, three-dimensional positioning technology, applied in positioning, radio wave measurement systems, instruments, etc., can solve the problems of difficult implementation, high cost, complex positioning system structure, etc., to improve overall performance, high accuracy, reduce The effect of path loss

Active Publication Date: 2021-11-16
西安茂德通讯科技有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the positioning system is complex in structure, high in cost and difficult to implement
[0007] In summary, none of the above methods is suitable for indoor 3D positioning with complex environments, precise positioning, and high real-time requirements.

Method used

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  • An Indoor 3D Positioning Method Based on Distributed Antennas
  • An Indoor 3D Positioning Method Based on Distributed Antennas
  • An Indoor 3D Positioning Method Based on Distributed Antennas

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Embodiment Construction

[0049] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0050] figure 2 It is a structural diagram of an indoor positioning system based on a distributed antenna group according to the present invention. The system includes a baseband processing unit (BBU, Building Base band Unite), a distributed antenna group (DAS, Distributed AntennaSets) composed of DAS 1 、DAS 2 、DAS 3 and DAS 4 and other four antenna groups, and the terminal Q. The BBU is connected to the four antenna groups in the indoor distributed antenna group through feeders.

[0051] Antenna set DAS k (k=1,2,...,4) all use planar arrays, the number of array elements is M k ×N k ,M k is the number of rows of the planar antenna array, N k is the column number of the planar antenna array, and the array element spacing is d.

[0052] The antenna groups respectively receive the sounding signal sent by the terminal Q, and the BBU performs co...

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Abstract

A wireless indoor positioning method based on distributed antennas, which uses distributed antennas combined with three-dimensional beams to achieve indoor real-time spatial positioning. Distributed antenna groups can effectively improve the coverage of the system, and the distribution of antenna groups can be used to adjust the area within the coverage area. The power distribution reduces the average transmit power of the terminal; the antenna units are scattered in the cell, which shortens the average access distance and reduces the path loss. The 3D precoding construction method based on antenna downtilt angle correction includes the horizontal and vertical channel information and the influence of the downtilt angle in the calculated precoding, so as to effectively suppress interference and improve the overall system performance. The beam in the vertical dimension is added, the useful signal receiving power of the terminal to be positioned is improved, the coverage space is increased, and it has a better anti-indoor multipath effect. The centroid space coordinate estimation method based on the intersection point of the sphere center-circumcenter connection line and distance weighting has high accuracy and is easy to implement in engineering.

Description

technical field [0001] The invention relates to the technical field of space positioning, in particular to an indoor three-dimensional positioning method based on distributed antennas. Background technique [0002] With the rapid increase of data services and multimedia services, people's demand for positioning is increasing day by day. For example, quickly find safe exits and elevators in airport halls, exhibition halls and public places. Indoor search for parking spaces, parking and metered billing. According to the customer's location, the store pushes promotional activities about goods, queuing appointments and payment services to customers. Emergency evacuation of large buildings, public safety and post-disaster rescue, etc. [0003] Most of the current positioning algorithms are researched on two-dimensional planes. However, in practical applications, it is often necessary to provide three-dimensional position information of nodes. Indoor three-dimensional positioni...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G01S5/06
CPCG01S5/06
Inventor王衍文王世芳王渭森马晓璠马玥武锐王旭东任旺旺
Owner西安茂德通讯科技有限公司