Correlation and acquisition method and equipment of Beidou navigation signal

A navigation signal and Beidou navigation technology, applied in the field of signal processing, can solve problems such as increasing the amount of signal acquisition calculations, reducing signal acquisition speed, and reducing correlation peaks, so as to increase the success rate of signal acquisition, improve correlation, and eliminate symbols Effect of Bit Toggle Influence

Inactive Publication Date: 2020-03-31
SZ DJI TECH CO LTD
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Problems solved by technology

However, the NH code also increases the possibility of symbol jumps in the signal acquisition process, and the symbol jumps will reduce the correlation peak value, thereby affecting the judgment of the capture result. In order to improve the capture performance, especially in weak signal capture When , the coherent integration time can only be extended, which will increase the calculation amount of signal acquisition and reduce the speed of signal acquisition

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  • Correlation and acquisition method and equipment of Beidou navigation signal
  • Correlation and acquisition method and equipment of Beidou navigation signal
  • Correlation and acquisition method and equipment of Beidou navigation signal

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[0043] 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. In addition, the following embodiments and features in the embodiments can be combined with each other under the condition of no conflict.

[0044] The terminology used in the present invention is for the purpose of describing specific embodiments only, not to limit the present invention. As used herein and in the claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It ...

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Abstract

A related capture method and device for a BeiDou navigation signal. The related method comprises: generating a local pseudo code of a preset length (101); obtaining a BeiDou navigation signal of a preset length with Doppler frequency shift removed (102); splitting the BeiDou navigation signal into a first navigation signal segment and a second navigation signal segment (103); configuring an NH code respectively for the first navigation signal segment and the second navigation signal segment (104); and according to the local pseudo code, the first navigation signal segment, the NH code configured for the first navigation signal segment, the second navigation signal segment, and the NH code configured for the second navigation signal segment, determining a correlation value of the BeiDou navigation signal (105). By configuring an NH code for a first navigation signal segment and a second navigation signal segment, the problem that the flipping of the NH code affects the capture performance can be solved, such that a BeiDou navigation signal is accurately captured, the influence of sign bit hopping is eliminated, and the capture performance is improved.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a method for correlating and capturing Beidou navigation signals and equipment thereof. Background technique [0002] Signal acquisition is the key signal processing process of the navigation system and the premise of positioning and navigation. In the Beidou satellite navigation system, the secondary modulation of the NH (Neumann-Hoffman) code in the Beidou signal can improve the correlation of the spreading code. However, the NH code also increases the possibility of symbol jumps in the signal acquisition process, and the symbol jumps will reduce the correlation peak value, thereby affecting the judgment of the capture result. In order to improve the capture performance, especially in weak signal capture When , the coherent integration time can only be extended, which will increase the amount of computation for signal capture and reduce the speed of signal capture. Contents ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/30
CPCG01S19/30
Inventor 仇晓颖韩彬
Owner SZ DJI TECH CO LTD
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