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A RFID positioning method based on improved hyperbolic model

A positioning method and a hyperbolic technology, applied in location information-based services, specific environment-based services, wireless communications, etc., to improve solution efficiency, improve positioning accuracy, and fully measure results

Active Publication Date: 2022-04-29
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, in view of the difficult problem of solving hyperbolic equations, a two-step method of linear approximation and error correction is proposed to solve the RFID positioning problem quickly and accurately

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  • A RFID positioning method based on improved hyperbolic model
  • A RFID positioning method based on improved hyperbolic model
  • A RFID positioning method based on improved hyperbolic model

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Embodiment Construction

[0041] Based on the RFID backscattering coupling mechanism, the invention utilizes the high sensitivity of phase information to distance to construct a novel hyperbolic positioning model and provides an efficient solution method. The present invention is generally divided into three parts to introduce the proposed RFID positioning mechanism. First, starting from the problem model, the relationship between electromagnetic wave phase and distance and other influencing factors are explained to provide a theoretical basis for the construction of the hyperbolic positioning model. Secondly, considering the problem that the nonlinearity of the hyperbolic equation makes the equations difficult to solve, it is proposed to use the asymptote in the form of a straight line instead of the hyperbola, and then use the method of least squares (LMS) to quickly find the approximate solution of the equations. Finally, in order to correct the extra error introduced by the linear approximation, th...

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Abstract

The invention relates to an RFID positioning method based on an improved hyperbolic model, which is realized by using a passive RFID system including a reader, an antenna, and a radio frequency tag. It is characterized in that it includes the following steps: the first step is phase-distance model construction; The second step is the hyperbolic positioning model; the third step is the linear approximation method to obtain the solution of the hyperbolic equation system; the fourth step is to use the Taylor series method to correct the error after the linear approximation.

Description

technical field [0001] The present invention belongs to the technical field of RFID indoor positioning, but the proposed hyperbolic positioning model and its solution are also applicable to other wireless positioning technical fields, such as ultra-wideband (UWB), cellular mobile positioning and other fields. Background technique [0002] With the rapid development of the Internet of Things, the scale of the network has increased rapidly, and the surge in the number of network nodes has made the problem of energy supply of nodes increasingly prominent. The passive sensory network enables nodes to obtain energy from the environment through light, wind, electromagnetic fields, etc., without providing additional energy, and provides a new solution to the energy supply problem of the Internet of Things. Passive passive UHF radio frequency identification technology (RFID), as an important wireless communication means of passive network, has become a model of the successful applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/02H04W4/33H04W4/021H04W64/00H04W4/80G06K19/077
CPCH04W4/023H04W4/33H04W4/021H04W64/006H04W4/80G06K19/07773
Inventor 马永涛付艳喜
Owner TIANJIN UNIV