An indoor three-dimensional positioning method based on distributed antennas

A distributed antenna and three-dimensional positioning technology, applied in positioning, radio wave measurement system, measuring device, etc., can solve the problems of complex structure, high cost and difficult implementation of the positioning system

Active Publication Date: 2018-06-15
西安茂德通讯科技有限公司
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  • Abstract
  • Description
  • Claims
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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 three-dimensional positioning method based on distributed antennas
  • An indoor three-dimensional positioning method based on distributed antennas
  • An indoor three-dimensional positioning method based on distributed antennas

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Embodiment Construction

[0050] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0051] 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.

[0052] 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.

[0053] The antenna groups respectively receive the sounding signal sent by the terminal Q, and the BBU performs co...

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Abstract

The invention provides an indoor three-dimensional positioning method based on distributed antennas. The method realizes indoor real-time space positioning by utilizing the distributed antennas and combined with a three-dimensional beam. A distributed antenna set effectively improves system coverage, and power distribution in a coverage area can be adjusted through distribution of the antenna set,thereby reducing average transmitting power of the terminal; antenna units are scattered in a cell, thereby shortening average access distance, and reducing path loss; in a 3D precode construction method based on antenna downward inclination angle correction, the calculated precode comprises horizontal dimension and vertical dimension channel information, and influence of the downward inclinationangle, thereby effectively suppressing interference and improving overall system performance; wave beam in the vertical dimension is increased, thereby improving useful signal reception power of a terminal to be positioned, increasing coverage space, and realizing a better anti-indoor-multipath effect; and a centroid space coordinate estimation method based on sphere center-circumcenter connection line intersection point and distance weighing is high in accuracy and easy for engineering realization.

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 & Authority Applications(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
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