A RFID tag positioning method based on synthetic aperture radar technology

An RFID tag, synthetic aperture radar technology, applied in the field of RFID positioning, can solve problems such as high cost and limited accuracy of equipment performance

Active Publication Date: 2022-04-05
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The AOA positioning method mainly uses the antenna array of the reader to measure the direction of arrival of the tag signal. This method requires an antenna array with special functions, the accuracy is limited by the performance of the equipment, and the cost is relatively high.

Method used

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  • A RFID tag positioning method based on synthetic aperture radar technology
  • A RFID tag positioning method based on synthetic aperture radar technology
  • A RFID tag positioning method based on synthetic aperture radar technology

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Embodiment Construction

[0040] A synthetic aperture radar technology-based RFID tag positioning method of the present invention will be further described below in conjunction with the accompanying drawings.

[0041] In the scene where there is relative movement between the tag and the reader, the synthetic aperture technology can use the relative movement between the antenna and the target to form a virtual antenna array, and determine the target position through the coherent superposition of multiple sampling phase values, thus having good anti-noise And the ability of multipath interference can improve the positioning accuracy. And it is suitable for unique dynamic application scenarios such as handheld devices, and does not require additional reference tags and time-consuming calibration stages. At the same time, the cost is relatively low, and positioning can be realized only with commercial equipment. Therefore, the present invention proposes a method for positioning RFID tags based on syntheti...

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Abstract

The present invention provides a kind of RFID label location method based on synthetic aperture radar technology, comprises label data acquisition stage; Pixel database establishment stage; Match location stage, comprises: Carry out matching and positioning of the area to be located; 2) Select the pixel point with the largest similarity, and use its position as the position result of the label; 3) When locating the next label, repeat the label data collection stage and the matching and positioning stage to obtain the position.

Description

technical field [0001] The invention belongs to the technical field of RFID positioning, and aims at the problem of high-precision positioning of tags by using tag phase and amplitude information obtained by a reader antenna moving along a known track. Background technique [0002] With the popularization of mobile Internet and smart phones, location-based service (Location Based Service, LBS) has received extensive attention, which has driven the development of various modern navigation and positioning technologies. The well-known outdoor positioning technology GPS cannot be applied to indoor positioning due to the occlusion of buildings and other reasons. In recent years, many indoor positioning technologies based on wireless networks have emerged, such as WiFi positioning, Bluetooth positioning, ZigBee positioning and RFID positioning. The rapid development of Internet of Things technology has made RFID technology widely used in the positioning, tracking and backtracking...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/46G01S13/90
CPCG01S13/46G01S13/90
Inventor 马永涛江越
Owner TIANJIN UNIV
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