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Satellite signal capturing method and equipment

A satellite signal capture and signal technology, applied in the field of satellite signal capture, can solve the problems of low signal power working range, limiting the application field of satellite navigation and positioning, and consuming receiver resources, etc.

Inactive Publication Date: 2014-06-25
SHAANXI BEIDOU HENGTONG INFORMATION TECH
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AI Technical Summary

Problems solved by technology

[0004] When the receiver is located in a complex environment such as indoors, forests or cities, the satellite signal is severely weakened, and the signal power will be far lower than the working range of the general receiver, thus limiting the application field of satellite navigation and positioning. , the prior art usually uses a parallel acquisition method based on Fourier transform FFT. Specifically, the parallel acquisition method based on FFT uses multiple acquisition channels, and each channel completes the received signal in parallel with different code phases and different Doppler frequencies. The correlation calculation of the local regenerated signal, the acquisition speed is faster, but because this method requires a large number of FFT calculations, it increases the algorithm complexity of weak satellite signal acquisition, thus greatly consuming the resources of the receiver

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  • Satellite signal capturing method and equipment
  • Satellite signal capturing method and equipment

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Embodiment Construction

[0046]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.

[0047] An embodiment of the present invention provides a method for capturing satellite signals, such as figure 1 As shown, the subject of execution of the method is a receiver, and the method includes:

[0048] S101. The receiver receives the received signal sent by the navigation satellite on the acquisition frequency.

[0049] Wherein, the capture frequency includes a frequency determined from a set Doppler frequency range, and the navigation satellite may ...

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Abstract

The invention provides a satellite signal capturing method and equipment, and relates to the field of satellite navigation. The satellite signal capturing method and equipment aim to reducing the algorithm complexity of captured weak satellite signals and reducing consumption of resources of a receiver. The satellite signal capturing method comprises the steps that receiving signals sent by a navigation satellite are received through the receiver at the capturing frequency, re-sampling is conducted on the receiving signals, odd-even grouping is conducted on sampling results and correlation operation is conducted on grouping results to determine that satellite signals of the navigation satellite are captured. The method and equipment are used for capturing the satellite signals.

Description

technical field [0001] The invention relates to the field of satellite navigation, in particular to a method and equipment for capturing satellite signals. Background technique [0002] In recent years, satellite navigation and positioning systems have been more and more widely used. Receivers can achieve all-day and all-weather continuous navigation around the world, and the capture of satellite signals is the first step and key to receiver signal processing. The performance directly affects the overall positioning effect of the receiver. [0003] In the prior art, the receiver needs to obtain signal propagation time and satellite position information from at least 4 satellites, and obtain the position of the receiver based on these information. Specifically, the receiver needs to complete rough synchronization with the received satellite signals , that is, the acquisition process of the spread spectrum signal, the phase offset of the pseudo-random code and the signal carr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/24G01S19/30
CPCG01S19/246
Inventor 任娟娟李波李卫斌王红丽
Owner SHAANXI BEIDOU HENGTONG INFORMATION TECH
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