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BOC signal digital distortion analysis method under satellite navigation multiplexing modulation

A satellite signal multiplexing technology, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve tracking errors and ranging errors, cannot calculate distortions in a timely and accurate manner, and cannot effectively and quickly discover Signal distortion and other problems, to achieve the effect of accurate distortion

Pending Publication Date: 2019-08-09
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology

Eventually, the correlation peak curve in the tracking process of the receiver will be abnormal compared with the ideal situation, resulting in varying degrees of tracking error and ranging error for receivers with different tracking loops and different phase detectors
In the prior art, in the analysis of the BOC signal under the multiplexing modulation of satellite navigation, most of them cannot effectively and quickly find the distortion in the signal, and cannot calculate the distortion in time and accurately.

Method used

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  • BOC signal digital distortion analysis method under satellite navigation multiplexing modulation
  • BOC signal digital distortion analysis method under satellite navigation multiplexing modulation
  • BOC signal digital distortion analysis method under satellite navigation multiplexing modulation

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the embodiments.

[0023] The present invention provides a method for analyzing BOC signal distortion under multiplex modulation of satellite navigation, including the following steps:

[0024] S100: Obtain the BOC signal under multiplex modulation;

[0025] S200: Solve the power spectral density function of the BOC signal under multiplex modulation according to the BOC signal under multiplex modulation;

[0026] When the BOC signal undergoes digital distortion, there are three different situations. Since the typical representative of the BOC modulated signal in the GNSS system at this stage is the GPS L1 M signal, this article still uses the BOC(10,5) signal as the analysis object for detailed analysis Analytical formulas for the power spectral density of BOC signals under different digital distortion principles. The general expression of BOC signal is:

[0027]

[0028] Where, a k Is a pseudo-code signa...

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Abstract

The invention discloses a BOC signal digital distortion analysis method under satellite navigation multiplexing modulation. The method comprises the following steps: S100, satellite signals are acquired; S200, a power spectral density function of the satellite signals is solved according to the satellite signals; S300, according to the expression of the power spectral density function of the satellite signals, a power spectral density map of the satellite signals is drawn; S400, based on whether a spike appears on the power spectral density map of the satellite signals, whether digital distortion happens to the satellite signals is judged; and S500, if distortion happens to the satellite signals, a zero-crossing calculation method is adopted to accurately calculate the digital distortion amount of the satellite signals. The distortion condition happening in signals can be effectively and quickly found out, and the distortion amount can be timely and accurately calculated.

Description

Technical field [0001] The invention relates to a digital distortion analysis method of satellite navigation signals, in particular to a digital distortion analysis method of BOC signals under satellite navigation multiplexing modulation. Background technique [0002] Satellite navigation ranges from basic research fields (astronomy, mechanics, physics, geodynamics, etc.) to engineering technology fields (information transmission, deep space exploration, space vehicles, time transmission, speed measurement and time service, etc.), and is related to national economic construction and national security Many important departments and fields (maritime, transportation, rescue, precision agriculture, earthquake monitoring, electronic communication, etc.) have occupied an important position and played an important role. It can be said that satellite navigation technology is a concentrated expression of various basic theories, the latest scientific and technological achievements, the nat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/30G01S19/23
CPCG01S19/30G01S19/23
Inventor 康立饶永南王雪卢晓春
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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