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Method for monitoring GNSS receiver autonomous integrity based on multi-satellite failure recognition

A fault identification and receiver technology, applied in the direction of measuring devices, beacon transmitters, radio wave measurement systems, etc., can solve problems such as lack of processing methods

Active Publication Date: 2007-07-11
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

At present, most of the research on RAIM only focuses on the problem of single-satellite failure. For the detection and identification of simultaneous failure of multiple satellites, there is a lack of simple and effective processing methods; During use, with the increase of the number of visible satellites, the probability that two or more than two satellites fail at the same time can no longer be ignored. The autonomous integrity technology based on multi-satellite failure identification proposed by the present invention makes this problem solved. solve

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  • Method for monitoring GNSS receiver autonomous integrity based on multi-satellite failure recognition
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  • Method for monitoring GNSS receiver autonomous integrity based on multi-satellite failure recognition

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Embodiment Construction

[0108] The following content is applicable to the RAIM monitoring where at most two satellites fail at the same time in the GNSS navigation receiver (for the RAIM detection of more faulty satellites, it can be obtained by similar steps):

[0109] a) The structural block diagram of the GNSS navigation receiver is shown in Fig. 5, and the baseband correlator provides the pseudorange observations ρ of all visible satellites.

[0110] b) Initialize parameters to obtain relevant data for RAIM monitoring, including: measured pseudorange ρ and pseudorange estimated value ρ 0 The difference y, the cosine vector value of the direction from each satellite to the user receiver, and the linearization matrix H is formed by it.

[0111] c) Determine the false alarm probability threshold pbias according to the false alarm probability required by the system. The formula is as follows:

[0112] P ( S ...

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Abstract

The GNSS multi star failure identification starts with feasibility analysis of self automatic completeness to make single or multi star failure judgment, comparing the inspection statistical gauge with single star or multi star inspection door limit, entering into corresponding failure identification if it exceeds the limit. It uses feature deviation line for single star failure identification, presumption for multi satellite failure identification, eliminating failure satellite in the chosen satellite group with repeated above procedures. With vigor failure elimination method, it can be determine all kinds of circumstances like single star or multi star failures, or incomplete inspection based on current data.

Description

1. Technical field [0001] The invention relates to an autonomous integrity monitoring method of a GNSS receiver, in particular to an autonomous integrity monitoring technology for multi-satellite fault identification. 2. Background technology [0002] Integrity refers to the ability to provide timely warnings to users when the system cannot be used for normal positioning and navigation, or when the system error exceeds the limit. In the receiver, the method of monitoring only relying on the positioning signal acquired by the receiver itself is called Receiver Autonomous Integrity Monitoring (RAIM). On the one hand, RAIM ensures the positioning accuracy, and on the other hand, it realizes the monitoring of the working status of the satellite. It is currently the only autonomous and effective method for satellite positioning to obtain integrity monitoring. The method utilizes redundant ranging signals to detect satellite errors that can cause large positioning errors. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/14G01S1/00G01S5/00G01S19/23
Inventor 张晓林张强常啸鸣李宏伟张展苏琳琳张帅
Owner BEIHANG UNIV
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