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Method and device for realizing capture preprocessing

A technology of preprocessing and preset duration, applied in the field of satellite navigation, can solve the problem of large amount of calculation, and achieve the effect of reducing the number, improving the capture efficiency, and shortening the time for the first positioning

Pending Publication Date: 2021-04-30
DATANG SEMICON DESIGN
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  • Abstract
  • Description
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Problems solved by technology

[0009] At present, the main search strategy used in the capture process is the simple and easy linear search, but with a large amount of calculation; parallel frequency search, or parallel code phase search, that is, the code phase or frequency dimension is processed in parallel to reduce the search unit; the latter two The search method reduces calculations to a certain extent and improves capture efficiency; however, all satellites in the system must be searched one by one during cold start

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  • Method and device for realizing capture preprocessing
  • Method and device for realizing capture preprocessing
  • Method and device for realizing capture preprocessing

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Embodiment Construction

[0051] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, the embodiments in the present application and the features in the embodiments may be arbitrarily combined with each other if there is no conflict.

[0052] The steps shown in the flowcharts of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that herein.

[0053] figure 1 A flow chart of a method for implementing capture preprocessing according to an embodiment of the present invention, such as figure 1 shown, including:

[0054] Step 101, predicting and determining the visible satellites of the navigation receiver within a pres...

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Abstract

The invention discloses a method and device for realizing capture preprocessing, and the method comprises the steps: estimating and determining a visible satellite of a navigation receiver within a preset duration according to the satellite visible associated information of the navigation receiver; and performing capture processing according to the visible satellite of the navigation receiver within the pre-estimated and determined preset duration. According to the embodiment of the invention, the number of searched satellites during cold start is reduced, the cold start first-time positioning time is shortened, and the capture efficiency of the navigation receiver is improved.

Description

technical field [0001] This article relates to, but is not limited to, satellite navigation technology, especially a method and device for realizing acquisition preprocessing. Background technique [0002] Global Navigation Satellite System (GNSS, Global Navigation Satellite System) is playing an increasingly irreplaceable and important role in people's daily life, especially in the fields of navigation, exploration, monitoring, measurement, communication timing and other fields. . With the rapid development of civilian applications in recent years, the global satellite navigation system has gradually deepened in daily life, and satellite navigation technology is inseparable from mobile phones, personal computers, automobiles, civilian aircraft, missiles, and fighter aircraft. All major countries in the world are working hard to develop satellite navigation technology. At present, there are multiple satellite navigation systems. Countries compete independently to develop sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/24G01S19/28G01S19/37
CPCG01S19/24G01S19/28G01S19/37
Inventor 宋挥师赵海龙徐雄伟刘晓燕
Owner DATANG SEMICON DESIGN
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