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Indoor wireless positioning method based on RFID

A positioning method and indoor wireless technology, applied in the field of indoor wireless positioning based on RFID, can solve the problems of large positioning errors of edge nodes, achieve the effects of improving positioning accuracy, solving multipath problems, and good adaptability

Active Publication Date: 2017-04-26
XIAMEN UNIV TAN KAH KEE COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the purpose of the present invention is to propose a RFID-based indoor wireless positioning method to solve the problem of large edge node positioning errors, and at the same time improve the positioning accuracy of the overall node and solve the multipath problem, adapting to various environments better sex

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  • Indoor wireless positioning method based on RFID
  • Indoor wireless positioning method based on RFID
  • Indoor wireless positioning method based on RFID

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Embodiment Construction

[0064] The present invention will be further described below in conjunction with the drawings and embodiments.

[0065] This embodiment provides an indoor wireless positioning method based on RFID.

[0066] This embodiment includes the following contents:

[0067] (1) The working environment of the algorithm.

[0068] This embodiment is essentially an improvement to the LANDMARC system, so the working environment refers to the settings of the LANDMARC system, as follows figure 1 Shown. figure 1 It is just a special case of the application of this algorithm. In actual applications, N readers and M reference tags can be set according to different requirements, and there are K tags to be tested. The reader and the reference tag can also be placed in different positions, the distance between the reference tag can be set to D ref . This special case contains 4 readers, 16 reference tags and 10 tags to be tested. 4 readers are distributed on the four vertices, and 16 reference tags are e...

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PUM

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Abstract

The invention relates to an indoor wireless positioning method based on RFID. The method includes the following steps: firstly acquiring the coordinates of reference labels, measuring RSSI values of each reader to the reference labels and a to-be-measured label, setting the RSSI values of the reference values to be RSSIrefs and the RSSI value of the to-be-measured label to be RSSItag; then for each reader, comparing the RSSI values of the reference label and the to-be-measured label, selecting 3 reference labels which is closest to the RSSI value of the to-be-measured label as candidate adjacent labels; then based on the number of appearance of each candidate adjacent label, selecting an adjacent label; and finally based on the selected adjacent label, computing the position of the to-be-measured label. According to the invention, the method reduces large errors in positioning edge nodes, increases positioning precision of the all nodes and addresses the multi-path problem, and is better applicable to all environments.

Description

Technical field [0001] The invention relates to the field of wireless positioning, in particular to an indoor wireless positioning method based on RFID. Background technique [0002] With the popularization of smart phones and the Internet, the demand for location-based services (LBS) is growing. In recent years, the rapid development and popularization of wireless local area network technology and wireless personal area network technology have provided more positioning technologies and methods for wireless positioning. Wi-Fi technology in wireless local area network is currently the most mainstream wireless communication technology used in daily work and life. Due to the increasing coverage of Wi-Fi hotspots, it is an estimate based on the geographic location of Wi-Fi hotspots Lay a good foundation for early application. The positioning accuracy of the Wi-Fi-based positioning system can reach several meters to tens of meters, and the update frequency of the positioning can rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/06
CPCG01S5/06
Inventor 曾党泉
Owner XIAMEN UNIV TAN KAH KEE COLLEGE