A Pseudo-Lite Layout Method for Improving Positioning Accuracy

A layout method and positioning accuracy technology, applied in the field of pseudolite positioning, can solve problems such as inability to obtain positioning results

Active Publication Date: 2020-10-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

However, for a particular user, such as a user at a fixed point, these layouts may not achieve optimal targeting results

Method used

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  • A Pseudo-Lite Layout Method for Improving Positioning Accuracy
  • A Pseudo-Lite Layout Method for Improving Positioning Accuracy
  • A Pseudo-Lite Layout Method for Improving Positioning Accuracy

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Embodiment Construction

[0018] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the implementations shown and described in the drawings are only exemplary, intended to explain the principle and spirit of the present invention, rather than limit the scope of the present invention.

[0019] Embodiments of the present invention provide a pseudolite layout method for improving positioning accuracy, such as figure 1 As shown, including the following steps S1-S5:

[0020] S1. Set the user position, generate N initial layouts, and set the initial position and initial speed of each layout.

[0021] The three-dimensional positions of n pseudolites (x j ,y j ,z j ) are combined into a Q-dimensional layout, where j=1,2,...,n, Q=n×3. A total of N layouts are set, where the position of the i-th layout is denoted as S i =(s i1 ,s i2 ,...,s iQ ), the velocity is denoted as v i =(v i1 ,v i2 ,...,v iQ ...

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Abstract

The invention discloses a pseudolite layout method for improving positioning accuracy. Aiming at the influence of the GDOP value on the quality of the pseudolite layout, the GDOP value corresponding to the classic layout is first calculated, and then the GDOP value is optimized by using an optimization algorithm. And the optimized pseudolite layout is applied to positioning, and high-precision user positioning results are obtained. The invention effectively improves the positioning accuracy and can be extended to any number of pseudolite layouts.

Description

technical field [0001] The invention belongs to the technical field of pseudolite positioning, and in particular relates to the design of a pseudolite layout method for improving positioning accuracy. Background technique [0002] At present, the global satellite navigation system has been widely used in the fields of navigation, positioning and measurement, but the navigation satellites are distributed at a height of 20,000 km above the ground, which makes the user's vertical positioning accuracy poor, and the number of visible satellites is affected by the weather and other natural environments. Therefore, it is necessary to introduce pseudolites to solve these two problems. The introduction of pseudolites can improve the layout of the satellite system, thereby significantly improving the positioning accuracy, so many researchers have conducted a lot of research on this. [0003] Young et al. used the positioning matrix to conclude that increasing the number of pseudolite...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/11
CPCG01S19/11
Inventor 宋劼李洪星王坚李桓李玉柏
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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