RFID-based positioning method and device and electronic equipment

A positioning device and phase technology, applied in the computer field, can solve the problems of signal distortion, cross-reading, missed reading, etc., and achieve the effect of eliminating interference components and accurate label positioning.

Pending Publication Date: 2021-09-21
ALIBABA GRP HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In actual use and deployment, when the RFID system reads the target RFID tag, due to the existence of multiple non-line-of-sight propagation paths caused by reflection, diffraction, etc., the signal will be distorted and the reading performance of the system will be affected. , resulting in serial reading or missing reading, etc.

Method used

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  • RFID-based positioning method and device and electronic equipment
  • RFID-based positioning method and device and electronic equipment
  • RFID-based positioning method and device and electronic equipment

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Embodiment Construction

[0033] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the embodiments of the present invention shall fall within the protection scope of the embodiments of the present invention.

[0034] Line-of-sight propagation (LOS propagation) refers to the propagation of space waves between two points that can be directly reached when ultrashort waves and microwaves are used for ground communication and broadcasting. Its distance is similar to the distance that people's line of si...

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PUM

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Abstract

The embodiment of the invention provides a RFID-based positioning method and device and electronic equipment. The RFID-based positioning method provided by the embodiment of the invention comprises: transmitting a superposed signal comprising detection signals of a plurality of frequency points; modulating and reflecting the superposed signal by an RFID tag and then receiving the superposed signal by a receiving antenna; determining the channel state information (CSI) of a reflected signal, and determining a direct path CIR according to the CSI; and finally, obtaining the arrival phase of each frequency point signal through direct path CIR reverse conversion, so that a power holographic image is constructed, and determining the position of the RFID tag based on the power holographic image. Interference components in the received signal are eliminated, and accurate tag positioning is realized.

Description

technical field [0001] The embodiment of the present invention relates to the field of computer technology, and in particular to an RFID-based positioning method, device and electronic equipment. Background technique [0002] Radio-frequency identification technology (Radio-Frequency Identification, RFID) refers to the technology of non-contact and remote activation of tags and reading their IDs through wireless signals. RFID tags can work without batteries, so they are easy to use and low in production cost. They have been widely used in identification documents, access control, logistics transportation and asset management and other fields. [0003] In actual use and deployment, when the RFID system reads the target RFID tag, due to the existence of multiple non-line-of-sight propagation paths caused by reflection, diffraction, etc., the signal will be distorted and the reading performance of the system will be affected. , resulting in the phenomenon of serial reading or ...

Claims

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Application Information

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IPC IPC(8): H04W4/80H04W64/00H04B7/06
CPCH04W4/80H04W64/00H04B7/0626
Inventor 吴林隆王雪马云飞张鹏宇刘洪强张铭
Owner ALIBABA GRP HLDG LTD
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