TDOA positioning method for indoor positioning based on height assisted correction

A positioning method and indoor positioning technology, which is applied in the direction of location information-based services, positioning, short-distance communication services, etc.

Active Publication Date: 2017-11-21
ZHENGZHOU LOCARIS ELECTRONICS TECH CO LTD
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Problems solved by technology

[0003] Aiming at the deficiencies of existing positioning methods in indoor positioning scenarios, the pres

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  • TDOA positioning method for indoor positioning based on height assisted correction
  • TDOA positioning method for indoor positioning based on height assisted correction
  • TDOA positioning method for indoor positioning based on height assisted correction

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Embodiment Construction

[0040] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, so as to better understand the present invention, but the protection scope of the present invention is not limited thereto.

[0041]The TDOA positioning method of indoor positioning based on height-assisted correction of the present invention comprises the following steps:

[0042] Step (1): In the indoor three-dimensional environment, set M base stations including the master base station; use wired or wireless synchronization to make the master base station and the slave base station at the same reference clock, the target node sends wireless signals, locates the base station and obtains the target The time when the wireless signal of the node arrives at each base station;

[0043] Step (2): Input the empirical height of the target node or the measured height obtained by using the auxiliary sensor And read the original TOA data of the base s...

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Abstract

The invention discloses a TDOA positioning method for indoor positioning based on height assisted correction, which includes the following steps: (1) setting M base stations including a master station in a three-dimensional indoor environment, and getting the time when a wireless signal of a target node arrives at each base station; (2) inputting the experience height of the target node or the measured height Z-(^) obtained by an auxiliary sensor, reading TOA original data of the base stations and the target node, calculating the difference between the arrival time of each slave base station and the arrival time of the master base station, and getting M-1 TDOA values through processing; and (3) calculating the position of the target node according to the position of a positioning base station and the arrival time difference of the target node. The method can reduce position deviation caused by the neglect of the height of the base stations in near-field indoor positioning, and is suitable for indoor positioning under circumferential distribution of base stations. Compared with the Chan positioning algorithm, the method is more suitable for near-field indoor positioning and indoor positioning under circumferential layout of base stations.

Description

technical field [0001] The invention belongs to wireless positioning technology, and relates to a TDOA positioning method for indoor positioning based on height-assisted correction, which can be used for position calculation of indoor positioning systems based on time difference of arrival measurement such as ultra-wideband and CSS. Background technique [0002] Indoor positioning refers to the use of WiFi, Bluetooth, ZigBee, RFID, CSS, ultra-wideband and other technologies to achieve position positioning in an indoor environment. Among them, in CSS and ultra-wideband wireless positioning systems, TDOA is widely used to complete the position calculation. TDOA estimates the coordinate value of the target node by measuring the time difference between the arrival of the signal at different base stations. Multiple TDOA measurement values ​​can form a set of target node position information. Hyperbolic equations, but commonly used analytical algorithms such as Fang, Chan, Friedla...

Claims

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Application Information

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IPC IPC(8): H04W4/00H04W4/02H04W4/04G01S5/02G01S5/06G01S5/12
CPCG01S5/0252G01S5/06G01S5/12H04W4/023H04W4/04H04W4/80
Inventor 张绘军刘丽珍张怀良王洋范帅芳肖岩徐月娜
Owner ZHENGZHOU LOCARIS ELECTRONICS TECH CO LTD
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