Device and method for monitoring in-orbit integrity risk of navigation satellite

A navigation satellite and integrity technology, which is applied in the direction of measuring devices, satellite radio beacon positioning systems, radio wave measurement systems, etc., can solve the problems that fault monitoring risks cannot be obtained through theoretical analysis, and achieve comprehensive and accurate abnormal types, and realize strong effect

Active Publication Date: 2019-11-15
BEIJING INST OF SPACECRAFT SYST ENG
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Problems solved by technology

[0005] The technical solution of the present invention is to overcome the deficiencies of the prior art, propose a device and method for monitoring the on-orbit integrity risk of navigation satellites, and solve the problem that the fault monitoring risk cannot be obtained through theoretical analysis. For the reception and processing of on-orbit navigation signals, extract the eigenvalues ​​of the signals

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  • Device and method for monitoring in-orbit integrity risk of navigation satellite
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  • Device and method for monitoring in-orbit integrity risk of navigation satellite

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] The invention relates to a device for monitoring the on-orbit integrity risk of a navigation satellite, comprising: a receiving module, a feature extraction module, and a monitoring and judging module.

[0025] The receiving module: receives the navigation signal transmitted by the navigation satellite, obtains the test signal corresponding to the navigation signal according to the navigation signal, and sends the test signal to the feature extraction module. The navigation signal includes two orthogonal signals i(k) and q(k), which are converted into an intermediate frequency signal by a down converter, and the intermediate frequency signal is subjected to analog / digital conversion, and after capture and tracking are completed, despread and despread Adjustment processing; obtain the navigation signals of K sampling points befo...

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Abstract

The invention relates to a device and method for monitoring in-orbit integrity risk of a navigation satellite. The device comprises a receiving module, a characteristic extraction module and a monitoring judgment module. The method comprises the steps of extracting a characteristic value of a signal, and calculating a monitoring threshold of abnormality of a navigation signal power, a pseudo codewaveform distortion value, pseudo code / carrier consistency, carrier leakage, pseudo carrier deviation degree, message consistency and carrier phase consistency; comparing the characteristic value withthe monitoring threshold; and sending out a warning signal if the characteristic value exceeds the threshold. Monitoring on integrity of the navigation signal of the in-orbit navigation satellite isachieved, and accurate and timely warning of a user is achieved.

Description

technical field [0001] The invention relates to a device and method for monitoring the on-orbit integrity risk of navigation satellites, belonging to the technical field of satellite navigation system integrity monitoring. Background technique [0002] Integrity means that when the positioning system fails, it can warn the user in time, so as to prevent the user from being misled by the abnormally working navigation positioning signal. It is a degree of trust (measurement of confidence) for the correct navigation information provided by the entire navigation system. Safety includes the ability of the system to issue timely and effective warnings (called alarms) to users when they cannot be used for certain predetermined operations, that is, the ability of the system to warn navigation users when they do not trust the navigation results. [0003] People have a consensus on the high accuracy of satellite navigation systems under normal conditions, but satellite navigation sign...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/20
CPCG01S19/20
Inventor 聂欣张旭崔小准武向军赵洪博李振东李楠张大为
Owner BEIJING INST OF SPACECRAFT SYST ENG
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