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B1C weak signal acquisition method, device and computer storage medium

A weak signal, pseudo-random code technology, applied in the field of satellite navigation, can solve the problem of not being able to capture B1C signals, and achieve the effect of high effective coherent integration time

Active Publication Date: 2019-06-21
西安开阳微电子有限公司
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Problems solved by technology

[0004] In view of this, the present invention provides a method, device and computer storage medium for capturing weak B1C signals, so as to at least solve the problem that the prior art cannot capture B1C signals under weak signal conditions, effectively improve the capture sensitivity of B1C signals, and simply easy

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  • B1C weak signal acquisition method, device and computer storage medium
  • B1C weak signal acquisition method, device and computer storage medium

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] figure 1 Shown is a schematic flowchart of a method for capturing weak B1C signals provided by an embodiment of the present invention.

[0029] Such as figure 1 As shown, the method for capturing weak B1C signals provided by the embodiments of the present invention includes the following steps:

[0030] S101. Acquire satellite data received by the receiver, and perform down-conversion processing on the satellite data to obtain corresponding first sate...

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Abstract

The invention belongs to the technical field of satellite navigation, and discloses a B1C weak signal acquisition method, device and a computer storage medium. The method comprises steps: first satellite intermediate frequency data and second satellite intermediate frequency data are acquired, and by using the first satellite intermediate frequency data and the second satellite intermediate frequency data, sequential search is carried out under each Doppler frequency within a Doppler frequency search range; in the case of search, corresponding local carrier is firstly generated, the local carrier is used for carrier stripping, resampling is carried out according to a specified chip search interval, correlation is performed according to the resampled satellite data and a pseudorandom code corresponding to the current satellite, non-coherent accumulation of certain times is carried out on the basis of correlation until all frequencies in the Doppler frequency search range are searched, and whether capture is successful is judged according to a final result. The problem that B1C signals under a weak signal condition can not be captured in the prior art can be solved, the B1C signal capture sensitivity can be effectively improved, and the operation is simple and easy.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a B1C weak signal acquisition method, device and computer storage medium. Background technique [0002] The Beidou satellite navigation system is a global satellite navigation system developed by China itself, and it is one of the four major satellite navigation systems in the world. The Beidou satellite navigation system is referred to as the Beidou system. It is divided into three stages of construction and development. The first stage is the first generation of Beidou, the second stage is the second generation of Beidou, and the third stage is the third generation of Beidou. [0003] The ICD of the B1C satellite signal of the third generation of Beidou has been announced this year. The B1C signal is composed of two parts: the pilot component and the data component. The code length of the data channel and the pilot channel are both 10230 chips, the main code period...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/30G01S19/29
CPCY02D30/70
Inventor 董婷婷朱盈娜
Owner 西安开阳微电子有限公司
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