Satellite navigation signal channel SCB characteristic detecting method

A satellite navigation signal and detection method technology, which is applied in the field of satellite navigation, can solve the problems of not considering the influence of cross-correlation, and the inability to obtain correct conclusions, and achieve the effect of saving hardware costs, reducing sampling frequency requirements, and ensuring efficiency

Active Publication Date: 2016-06-29
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0006] However, the above method does not consider the influence of cross-correlation and cannot draw correct conclusions

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  • Satellite navigation signal channel SCB characteristic detecting method
  • Satellite navigation signal channel SCB characteristic detecting method
  • Satellite navigation signal channel SCB characteristic detecting method

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Embodiment Construction

[0040] Below in conjunction with accompanying drawing, working principle and working process of the present invention are further explained and illustrated:

[0041] Such as figure 1 Shown, a kind of satellite navigation signal channel SCB characteristic detection method comprises steps as follows:

[0042] (1) Gather satellite navigation signals;

[0043] Navigation signal acquisition or data reading. A clock with good short-term stability is used locally to generate a sampling clock, and satellite navigation signals are continuously collected under this clock, and sent to subsequent units for real-time continuous processing or post-processing after storage.

[0044] (2) Carrier stripping is carried out to the satellite navigation signal collected in step (1), obtains baseband signal;

[0045] Use open-loop or closed-loop tracking methods to estimate carrier frequency and phase, and perform carrier stripping to obtain baseband signals.

[0046] (3) carry out low-pass filt...

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Abstract

The invention discloses a satellite navigation signal channel SCB characteristic detecting method. The satellite navigation signal channel SCB characteristic detecting method comprises the following steps of: collecting a satellite navigation signal, and performing carrier wave stripping on the signal to obtain a baseband signal; performing lowpass filtering on the baseband signal; utilizing an ideal bandpass signal to calculate related curves; locking a point deviation curve according to the related curves; performing arithmetic averaging on the locked point deviation curve; and calculating SCB according to the mean result of the curve. According to the invention, the discreteness of single locked point deviation curve is considered, the cross-correlation disturbing influences of other signal components, data and the like are eliminated, and the navigation signal channel SCB characteristics can be assessed accurately.

Description

technical field [0001] The invention relates to a method for detecting SCB characteristics of a satellite navigation signal channel, belonging to the technical field of satellite navigation. Background technique [0002] In the satellite navigation signal channel index system, SCB, or S-curve Bias, is an important index to measure the symmetry of the correlation peak, which is directly related to the tracking bias of the receiver. [0003] At present, the following methods can be used to detect the SCB index of the satellite navigation signal channel characteristics: [0004] Method 1, using multiple channels of the receiver, the correlator spacing of each channel is different, tracking the same satellite signal at the same time, extracting the pseudo-range value, using the pseudo-range under the minimum spacing as a reference value, comparing the lock point deviation curve, and further Get the SCB value; [0005] Method 2, collect the signal, use a code period time signal...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/23
CPCG01S19/23
Inventor 蒙艳松王瑛刘文山王延光刘涛
Owner XIAN INSTITUE OF SPACE RADIO TECH
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