An Indoor Positioning Method Based on 4D Code Mapping

An indoor positioning and four-dimensional code technology, which is applied in the field of indoor positioning, can solve problems such as complex positioning methods, and achieve the effects of overcoming complex positioning methods, improving robustness, and good anti-multipath effect

Active Publication Date: 2020-10-09
XIJING UNIV
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Problems solved by technology

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

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  • An Indoor Positioning Method Based on 4D Code Mapping
  • An Indoor Positioning Method Based on 4D Code Mapping
  • An Indoor Positioning Method Based on 4D Code Mapping

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Embodiment Construction

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below, obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] An indoor positioning method based on four-dimensional code mapping, such as figure 1 As shown, it is a schematic structural diagram of an indoor positioning system based on four-dimensional code mapping in the present invention. The system includes: a baseband processing unit (BBU, Building Base bandUnite), a distributed antenna group (Ant), a mobile terminal to be positioned Q and its surroundings Terminal Q 1 , Q 2 , Q 3 and Q 4 . Among them, the distributed antenna group is controlled by Ant 1 、Ant 2 、Ant 3...

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Abstract

The invention discloses an indoor positioning method based on four-dimensional code mapping, and the method comprises the steps: (S100), carrying out the Kronecker product of a horizontal-dimensionalfeature vector matrix and a vertical-dimensional feature vector matrix, generating a feature vector matrix of an antenna group, mapping the feature vector matrix into a four-dimensional code, carryingout the matching, obtaining an approximate code word four-dimensional code, and obtaining a pre-coding matrix; (S200), performing beam forming on the base station transmitting signal according to theprecoding matrix of the mobile terminal; and (S300), forming a virtual cell taking the mobile terminal by the to-be-positioned mobile terminal and the antenna group as the center; and forming a van virtual cell taking the mobile middle end as the center with surrounding mobile terminals, constructing an estimation function to obtain a positioning target function, solving the positioning target function by adopting a nonlinear least square algorithm, and taking the coordinate when the positioning target function takes the minimum value as the coordinate of the to-be-positioned mobile terminal.According to the method, beam matching of four-dimensional code mapping is combined with a virtual cell cooperation mode, and indoor real-time space positioning is achieved.

Description

technical field [0001] The invention relates to an indoor positioning method, in particular to an indoor positioning method based on four-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 ant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/33H04W64/00G01S5/14H04B7/0456H04B7/06H04B7/08H04L25/02
CPCG01S5/14H04B7/0456H04B7/0617H04B7/086H04L25/0242H04W4/33H04W64/00
Inventor 王衍文王世芳马晓璠王玉马玥周锋马明娟雷霄龙
Owner XIJING UNIV
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