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A method to enhance the positioning effect of gnss terminals in urban environments

A terminal positioning and urban environment technology, applied in the field of satellite navigation, can solve problems such as enhancement, and achieve the effect of improving positioning accuracy

Active Publication Date: 2021-05-28
QIANXUN SPATIAL INTELLIGENCE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention is based on enhancing the GNSS positioning effect in the complex urban environment, based on scene recognition, and solves the technical problem of GNSS terminal positioning accuracy

Method used

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  • A method to enhance the positioning effect of gnss terminals in urban environments
  • A method to enhance the positioning effect of gnss terminals in urban environments
  • A method to enhance the positioning effect of gnss terminals in urban environments

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Embodiment Construction

[0031] Based on enhancing the positioning effect of GNSS terminals in the urban environment, the present invention extracts features of some special scenes, such as open scenes and unilateral occlusion scenes; A corresponding processing strategy is proposed to improve the positioning accuracy of GNSS terminals in complex urban environments.

[0032] Hereinafter, the present invention will be further described in conjunction with the drawings and embodiments.

[0033] like figure 1 As shown, the satellite sky map received by the GNSS terminal is divided into 2 equal parts n quadrants (such as 4, 8, 16, 32, etc., different division strategies can be selected according to different processing strategies and application scenarios), and according to the azimuth angle of the satellites, the number of satellites in each quadrant is counted, and the following is carried out accordingly. Scene recognition and processing.

[0034] (1) Broad scene recognition and processing strategies...

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Abstract

The invention provides a method for enhancing the positioning effect of GNSS terminals in an urban environment, which divides the satellite sky map received by the GNSS terminal into two equal parts. n Four quadrants (such as 4, 8, 16, 32, etc., different division strategies can be selected according to different processing strategies and application scenarios), and according to the azimuth angle of the satellites, the number of satellites in each quadrant is counted for scene recognition and processing . Based on enhancing the positioning effect of GNSS terminals in the urban environment, the present invention extracts features of some special scenes, such as open scenes and unilateral occlusion scenes; A corresponding processing strategy is proposed to improve the positioning accuracy of GNSS terminals in complex urban environments.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a method for enhancing the positioning effect of a GNSS terminal in an urban environment. Background technique [0002] GNSS (Global Navigation Satellite System), including China's Beidou, American GPS, Russia's GLOANASS and Europe's GALILEO, can provide users with all-weather 3D coordinates, speed and time information. By analyzing the electromagnetic wave signal transmitted by the satellite terminal, the terminal can obtain information such as the position of the satellite and the distance between the terminal and the satellite. When 4 or more satellites are observed at the same time, it can realize single-point positioning through simple geometric relationships. [0003] The observations interpreted by the GNSS terminal will be affected by various error sources, mainly including: satellite clock error, satellite orbit error, ionospheric error, tropospheric error, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/20G01S19/08
CPCG01S19/08G01S19/20
Inventor 范国泽蒋智谭先科徐军倪成岗
Owner QIANXUN SPATIAL INTELLIGENCE INC