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Positioning method based on distribution characteristics of particles around TDoA hyperbolic curve

A particle distribution and positioning method technology, applied in the field of communications, can solve the problems of complex algorithms and too many initial conditions, and achieve the effect of simplifying the calculation process, reducing the initial conditions, and reducing the complexity

Pending Publication Date: 2022-07-29
航天新通科技有限公司
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Problems solved by technology

[0004] The present invention intends to provide a positioning method based on particle distribution characteristics around the TDoA hyperbola to solve the technical problems of too many initial conditions and complex algorithms in the positioning process based on TDoA technology in the prior art

Method used

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  • Positioning method based on distribution characteristics of particles around TDoA hyperbolic curve
  • Positioning method based on distribution characteristics of particles around TDoA hyperbolic curve
  • Positioning method based on distribution characteristics of particles around TDoA hyperbolic curve

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Embodiment

[0047] A localization method based on the distribution characteristics of particles around the TDoA hyperbola, as shown in the appendix figure 1 shown, including the following:

[0048] S1: Obtain the distance difference between the positioning tag and each base station according to TDoA ranging, clean the distance difference, and calculate and generate several hyperbolas according to the cleaned distance difference; figure 2 As shown in the figure, Target is a positioning label, points A, B, and C are base stations, and TDoA_AC and TDoA_BC are corresponding hyperbolas.

[0049] S2: Initialize the particle in the signal coverage area of ​​the base station, and assign the particle corresponding weight under different hyperbolas according to the distance from the particle to each hyperbola; superimpose and normalize the weight of the particle to generate the global weight of each particle.

[0050] S3: Screen the particles according to the global weight and a preset threshold,...

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Abstract

The invention relates to the technical field of communication, in particular to a positioning method based on distribution characteristics of particles around a TDoA hyperbolic curve, which comprises the following steps of: acquiring distance difference between a positioning label and each base station according to TDoA distance measurement, performing data cleaning on the distance difference, and calculating and generating a plurality of hyperbolic curves according to the cleaned distance difference; initializing particles in a signal coverage area of the base station, and endowing the particles with corresponding weights under different hyperbolic curves according to the distances from the particles to the hyperbolic curves; carrying out superposition and normalization processing on the weights of the particles to generate a global weight of each particle; and screening the particles according to the global weight and a preset threshold value, and calculating and generating a positioning coordinate of the positioning tag according to the global weight of the screened particles. By adopting the scheme, the technical problems of excessive initial conditions and complex algorithm in the positioning process based on the TDoA technology in the prior art can be solved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a positioning method based on particle distribution characteristics around a TDoA hyperbola. Background technique [0002] Time Difference of Arrival (TDoA) is one of the commonly used positioning techniques, and its principle is to use the time difference between signals received by multiple base stations to determine the location of the tag. The positioning tag sends a wireless ranging signal to the outside world, and all base stations within the wireless coverage of the tag will receive the wireless signal. If two base stations with known coordinate points receive signals, and the distance between the tag and the two base stations is different, then the two base stations receive signals at different times. According to the geometric relationship, it is known that the distance difference between the two points is a constant, and the time difference between the tag sendin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W64/00H04L41/142
CPCH04W4/023H04W64/00H04L41/142
Inventor 华锋张尧郭子文朱明星陈林
Owner 航天新通科技有限公司
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