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High-precision and fast positioning method based on toa mode in non-line-of-sight environment

A positioning method and high-precision technology, applied in the field of wireless positioning, can solve the problems of reducing the accuracy and performance of the positioning system, divergence of positioning results, and failure of positioning results, etc., and achieve the effects of fast calculation time, no divergence of performance, and improved accuracy

Active Publication Date: 2021-12-28
INST OF GEODESY & GEOPHYSICS CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the complexity of the environment, after the signal is sent from the sending end, there are often different degrees of occlusion in the process of reaching the receiving end, thus introducing non-line-of-sight (NLOS) errors
Especially in the field of indoor positioning and 5G positioning, the existence of non-line-of-sight errors will seriously reduce the accuracy and performance of the positioning system. The most serious consequence is that the positioning results will diverge, resulting in the failure of positioning results.

Method used

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  • High-precision and fast positioning method based on toa mode in non-line-of-sight environment
  • High-precision and fast positioning method based on toa mode in non-line-of-sight environment
  • High-precision and fast positioning method based on toa mode in non-line-of-sight environment

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with specific examples and accompanying drawings.

[0049] The present invention provides a high-precision fast positioning method based on TOA mode in a non-line-of-sight environment, which includes the following steps:

[0050] S1. Determine the coordinates of each fixed base station, and the distance observation value between the mobile station and each fixed base station received by the mobile station; obtain the basic positioning equation between the mobile station and each base station according to the distance observation value.

[0051] This embodiment adopts a two-dimensional plane positioning scene, and the coordinates of each fixed base station are two-dimensional Cartesian coordinates, which can also be extended to three-dimensional according to the idea of ​​the present invention. If the observation value received by the mobile station is a time signal, it can be converted into a distance ...

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Abstract

A high-precision fast positioning method based on the TOA mode in a non-line-of-sight environment. The basic positioning equation between the mobile station and each base station is obtained according to the distance observation value; the basic positioning equation between the mobile station and the base station corresponding to the minimum distance observation value is selected. The positioning equation is used as the reference equation, and the basic positioning equation between other mobile stations and the base station is subtracted from the reference equation to obtain the standard form of least squares; the expression form of the L1 norm is constructed and converted into an expression of the L1 norm with additional linear constraints form; give the iterative process of the alternative direction method to obtain the positioning solution of the mobile station; bring the positioning solution into the L1 norm expression to obtain the absolute value residual, if the maximum absolute value residual and the absolute value residual If the median ratio is greater than the preset value, the positioning solution of the mobile station is output; otherwise, the basic positioning equation between the mobile station and the base station corresponding to the next distance observation value is used as the reference equation. The invention can reduce the influence of the non-line-of-sight error on the positioning accuracy.

Description

technical field [0001] The invention belongs to the technical field of wireless positioning, and in particular relates to a high-precision fast positioning method based on a TOA mode in a non-line-of-sight environment. Background technique [0002] Due to the complexity of the environment, after the signal is sent from the sending end, there are often different degrees of occlusion during the process of reaching the receiving end, thereby introducing non-line-of-sight (NLOS) errors. Especially in the field of indoor positioning and 5G positioning, the existence of non-line-of-sight errors will seriously reduce the accuracy and performance of the positioning system. The most serious consequence is that the positioning results will diverge, resulting in the failure of positioning results. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a high-precision fast positioning method based on the TOA mode in a non-line-of-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/00G01S5/02
CPCG01S5/0045G01S5/0072G01S5/0268
Inventor 何成文袁运斌
Owner INST OF GEODESY & GEOPHYSICS CHINESE ACADEMY OF SCI
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