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Tracking method of radio frequency tag

A trajectory tracking and radio frequency tag technology, applied in electromagnetic radiation induction, special data processing applications, measurement devices, etc., can solve the problems of white noise and diversity affecting the positioning accuracy of RFID tags

Active Publication Date: 2016-08-24
NANJING TAIXI INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, errors introduced by white noise and diversity will affect the positioning accuracy of RFID tags

Method used

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  • Tracking method of radio frequency tag
  • Tracking method of radio frequency tag
  • Tracking method of radio frequency tag

Examples

Experimental program
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Embodiment Construction

[0064] The present invention will be further described below in conjunction with drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

[0065] Please refer to figure 1 as shown, figure 1 It is a flow chart of a radio frequency tag track tracking method provided by an embodiment of the present invention.

[0066] A real-time tracking problem is defined as:

[0067] The trajectory equation of the label can be expressed as:

[0068] f(t)=f(t 0 )+(t-t 0 )·v(t)

[0069] Where f(t) represents the position of the label at time t, v(t) is the velocity vector of the label at time t, and t 0 for the initial moment.

[0070] The goal of this method is to solve the position f(t) of the movi...

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PUM

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Abstract

The invention provides a method for tracking a radio frequency tag track. A moving RFID tag is located and tracked in real time at the millimeter level through phase values. The method specifically includes the following steps that A, target space is divided; B, the phase values are collected through an antenna array; C, probability distribution of the position of the tag in the target space is calculated; D, influence on localization from white noise is eliminated; E, influence on localization from diversity is eliminated; F, the maximum probability position is searched for. According to the method, influence from white noise and diversity in RFID localization can be effectively eliminated and under the condition that only a small number of antennas are available, the moving RFID tag is located and tracked with high accuracy in real time through the virtual antenna array established according to the virtual antenna technology and under the condition of a small number of antennas.

Description

technical field [0001] The invention relates to the technical field of indoor positioning, in particular to a track tracking method of a radio frequency tag. Background technique [0002] Whether it is in the Internet of Things or in RFID applications, due to the urgent and diverse application requirements, positioning technology has always been a technical hotspot that has been extensively studied. Satellite positioning system (GPS) is often used to locate people and equipment, such as vehicle navigation, military operations, etc. However, in the actual environment, the coverage of the satellite positioning system still has obvious limitations due to its technical characteristics. Although the satellite positioning system can effectively locate outdoors, because the satellite signal needs to be transmitted and received within the line of sight, the satellite positioning system will fail in most indoor or obstructed environments. At the same time, in large indoor environme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/06G06K7/10G06F19/00
CPCG01S5/06
Inventor 陈烨魁杨磊刘云浩
Owner NANJING TAIXI INFORMATION TECH
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