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Navigation signal integrity assessment method

A navigation signal and integrity technology, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., to solve problems such as the lack of a clear and unified test and evaluation method

Inactive Publication Date: 2016-09-07
CHINA AEROSPACE STANDARDIZATION INST
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Problems solved by technology

Due to the differences in the design and implementation methods of signal-in-space integrity of different navigation systems, there is no clear and unified test and evaluation method for this indicator

Method used

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Embodiment Construction

[0029] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0030] The invention provides a method for evaluating the integrity of a navigation signal, which utilizes the downlink navigation signal to realize the determination of the integrity index of the space signal through evaluation and statistics.

[0031] The present invention firstly uses the downlink navigation signal of the navigation satellite (Beidou satellite navigation system) to obtain the health word status sequence, then obtains the time sequence value of the user's ranging error through precision evaluation, and judges the user's ranging error according to the integrity alarm limit under specified conditions. Whether it exceeds the limit or not, record the error over-limit sequence, and finally obtain the signal-in-space integrity risk by comparing the health word status sequence and the error over-limit sequence according to the integrity alarm...

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Abstract

The invention discloses a navigation signal integrity assessment method. According to the invention, navigation satellite downlink navigation signal monitoring data are used to carry out integrity risk assessment, and an operable and easy effective method is provided for spatial signal integrity indicator assessment. According to the invention, a downlink navigation signal is used to acquire a spatial signal health word sequence and a spatial signal real-time user ranging error. According to the spatial signal real-time user ranging error, a spatial signal integrity monitoring state sequence is acquired. When an available signal health word becomes unavailable, a signal alarm event is defined. When an available signal integrity monitoring state sequence becomes unavailable, an abnormal monitoring event is defined. Finally, the signal alarm event and the abnormal monitoring event are combined to compare the consistency of the spatial signal health word sequence and the spatial signal integrity monitoring state sequence to assess the navigation signal integrity.

Description

technical field [0001] The invention relates to the technical field of reliability and safety of satellite navigation systems, in particular to a method for evaluating the integrity of satellite navigation signals. Background technique [0002] After the completion of the satellite navigation system, the system faces the tasks of providing public service performance commitments for the majority of users and maintaining necessary performance indicators. In addition to the accuracy indicators, the necessary performance indicators required by users such as international civil aviation and maritime affairs also include integrity, continuity and availability. [0003] Integrity in the navigation system has both reliability and safety characteristics. Domestic and foreign researches on integrity mostly focus on the theoretical algorithm and test evaluation of navigation service integrity. The United States took the lead in listing signal-in-space integrity as a normative indicato...

Claims

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Application Information

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IPC IPC(8): G01S19/20
CPCG01S19/20
Inventor 龚佩佩郑恒王晋婧杨卓鹏李海生李琴
Owner CHINA AEROSPACE STANDARDIZATION INST
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