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An efficient passive time division TDOA positioning method for eliminating clock frequency difference

A positioning method and a technology of clock frequency difference, applied in the field of wireless positioning, can solve the problems of unfavorable implementation of local area network positioning system, increase of system cost, etc., achieve the effect of improving system capacity and reliability, eliminating clock frequency, and improving system efficiency

Active Publication Date: 2018-12-18
宁波极位智能科技有限公司
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AI Technical Summary

Problems solved by technology

If an additional wireless or wired synchronization network is used, the system cost will be greatly increased, which is very unfavorable for implementation in cost-sensitive local area network positioning systems

Method used

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  • An efficient passive time division TDOA positioning method for eliminating clock frequency difference
  • An efficient passive time division TDOA positioning method for eliminating clock frequency difference

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Embodiment Construction

[0026] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0027] The technical solution of the present invention is: an efficient passive time-division TDOA positioning method that eliminates clock frequency differences. During the positioning process, the anchor node clock synchronization does not require an additional synchronization network, which greatly improves system efficiency and reduces costs. The label node only receives the positioning signal, and the positioning can be completed without sending the positioning signal to the anchor node. In this positioning mode, no matter how many label nodes are in the positioning area, the positioning of each label node can be completed, which greatly improves system capacity and reliability. At the same time, the present invention can significantly impro...

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Abstract

The invention discloses an efficient passive time division TDOA positioning method for eliminating clock frequency difference, In the positioning process, the label node only receives the positioningsignal and does not need to send the positioning signal to the anchor node to complete the positioning. In this positioning mode, no matter how many label nodes there are in the positioning area, thepositioning of each label node can be completed, which greatly improves the system capacity and reliability. Anchor node clock synchronization does not require additional synchronization network, which greatly improves the system efficiency and reduces the cost; And by arranging N (N) 1 anchor nodes in one region, from the point of view of arrangement and combination, Maximum range differences canbe obtained in one positioning cycle. The larger N is, the more range differences the label nodes get and the higher positioning accuracy is.

Description

technical field [0001] The invention belongs to the field of wireless positioning, in particular to a TDOA positioning technology. Background technique [0002] Wireless positioning system refers to the technology of positioning by measuring the position of fixed or moving objects by using the straight line and constant speed propagation characteristics of radio waves. Radiolocation includes radar, radio direction finding, radio navigation system and global positioning system. Wireless positioning technology can be divided into wide area network positioning technology and wireless local area network positioning technology. Among them, wide area network positioning is divided into satellite positioning and base station cellular mobile positioning; wireless local area network positioning mainly includes Wi-Fi positioning, ZigBee positioning, UWB positioning, CSS positioning technology, etc. [0003] In the current passive TDOA positioning method, the working mode of the ancho...

Claims

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Application Information

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IPC IPC(8): H04W4/02H04W64/00G01S5/02
CPCG01S5/02H04W4/02H04W4/023H04W64/00
Inventor 汪澎高鹏朱自强张立卓博顾问
Owner 宁波极位智能科技有限公司
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