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Indoor passive real-time positioning method based on ultra wide band technology

An ultra-wideband technology and passive positioning technology, which is applied in the field of indoor passive real-time positioning based on ultra-wideband technology, can solve the problems of large ranging errors and different time resolutions, and achieve the effect of improving utilization

Pending Publication Date: 2021-11-19
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose an indoor passive real-time positioning method based on ultra-wideband technology in view of the problem that different time resolutions of different devices in the prior art lead to large ranging errors

Method used

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  • Indoor passive real-time positioning method based on ultra wide band technology
  • Indoor passive real-time positioning method based on ultra wide band technology
  • Indoor passive real-time positioning method based on ultra wide band technology

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specific Embodiment approach 1

[0044] Specific implementation mode one: refer to figure 1 Specifically illustrate this embodiment, a kind of indoor passive real-time positioning method based on ultra-wideband technology described in this embodiment, comprises the following steps:

[0045] Step 1: The tag obtains the initial location information of the master base station and each slave base station, where there are at least three slave base stations, and the tag is the user base station;

[0046] Step 2: The master base station conducts inquiries and responses with each slave base station respectively. During the inquiry and response process, the tag only receives the signal from the master base station or the slave base station, and then obtains the time difference information;

[0047] Step 3: Obtain the reciprocal of the working frequency of the system time counter of the master base station, each slave base station and the tag, that is, the time resolution;

[0048] Step 4: According to the obtained ti...

Embodiment

[0110] Step 1: Obtain the initial location information of the primary base station and each secondary base station, where there are at least three secondary base stations, and the label is the user base station;

[0111] Step 2: The master base station conducts inquiries and responses with each slave base station respectively. During the inquiry and response process, the tag only receives the signal from the master base station or the slave base station, and then obtains the time difference information;

[0112] Step 2.1: The positioning system completes a communication process of positioning as attached figure 1 .

[0113] attached figure 1 The leftmost solid line in the figure is the master base station equipment timeline, the middle solid line is the slave base station equipment timeline (the number of slave base stations is n-1, n>3), and the right dotted line is the label equipment timeline. where the symbols to the left of the two solid lines (x in SSx is a positive ...

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Abstract

The invention discloses an indoor passive real-time positioning method based on an ultra wide band technology, relates to the field of ultra wide band distance measurement and the technical field of indoor positioning, and provides the indoor passive real-time positioning method based on the ultra wide band technology for solving the problem of large distance measurement error caused by different time resolutions of different devices in the prior art. In the aspect of distance measurement, the time resolution dynamically estimated in the positioning process and necessary timestamps are used for obtaining distance measurement information, the utilization rate of the equipment timestamps can be improved, a distance difference or distance solving method and a signal exchange mechanism of the distance difference or distance solving method can be simplified for a positioning system, and therefore the distance difference is accurately obtained in a passive mode; in the aspect of positioning, a CHAN-least square algorithm is utilized to overcome the problem of nonlinear iterative initial value calculation. Distance measurement and positioning are combined to form a set of complete passive positioning system.

Description

technical field [0001] The invention relates to the field of ultra-wideband ranging and the technical field of indoor positioning, in particular to an indoor passive real-time positioning method based on ultra-wideband technology. Background technique [0002] UWB wireless communication technology is widely used in indoor high-precision positioning due to its advantages such as high time resolution, anti-multipath interference, and low power consumption. In order to give full play to the advantages of ultra-wideband technology, the positioning system usually uses the flight time of the signal in the air to obtain the distance difference or distance in the ranging stage. The ranging methods can be divided into two categories: signal time difference of arrival (Time Difference of Arrival, TDOA) and Signal arrival time (Time of Arrival, TOA). TDOA is a method to directly obtain the distance difference between the tag and two different base stations, but it requires strict cloc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/10G01S5/00
CPCG01S5/10G01S5/0045
Inventor 王伟张家宁李欣黄平薛冰
Owner HARBIN ENG UNIV