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Satellite navigation receiver fault satellite detection method

A satellite navigation and detection method technology, applied in satellite radio beacon positioning system, measurement device, radio wave measurement system, etc., can solve problems such as fault-free satellite realization, complex, complex probability statistics calculation, etc., to reduce computational complexity , the effect of reducing the amount of calculation

Inactive Publication Date: 2017-05-24
TIANJIN 764 COMM AIRMANSHIP
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Problems solved by technology

[0004] In order to solve the problem that the satellite navigation receiver detects whether there is a faulty star in real time in the positioning solution and the current basic algorithm is too complicated to implement, this paper proposes a method based on pseudorange residual statistics based on the traditional least squares residual algorithm. The realization method of satellite navigation receiver fault star detection with the maximum value avoids complex probability and statistics calculation inside the receiver

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  • Satellite navigation receiver fault satellite detection method
  • Satellite navigation receiver fault satellite detection method
  • Satellite navigation receiver fault satellite detection method

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Embodiment Construction

[0028] Such as figure 1 As shown, the method of the present invention is described in detail.

[0029] The invention proposes a satellite navigation receiver fault star detection method. The principle block diagram can be found in the attached figure 1 , The specific implementation is as follows:

[0030] Suppose that the satellite navigation receiver is Beidou single system positioning, that is, the number of systems N sys = 1. The number of satellite navigation receiver tracking channels is 12, that is, the maximum number of satellites processed by a single positioning N svmax = 12. False alarm rate P fa =1.4×10 -6 . The implementation steps are as follows: (1) First, use the Chi-square distribution function to calculate the different fault thresholds under a certain false alarm probability when positioning with different satellite numbers, and store them in the internal memory of the satellite navigation receiver in advance. Use formula

[0031]

[0032] Calculate the numb...

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Abstract

The invention proposes a satellite navigation receiver fault satellite detection method. According to the method, pseudo-range remaining error calculated by weighted least squares positioning is compared with a set of thresholds stored in advance in a memory, so that whether a fault satellite exists can be determined; if the fault satellite exists, statistic quantities are constructed to calculate the pseudo-range remaining error quantity of each satellite; a maximum value is searched, so that the fault satellite can be identified and removed; and multiple times of circulation are performed, and therefore, the probability of misjudgment can be decreased, multi-satellite faults can be identified. With the method of the invention adopted, computational complexity is reduced; intermediate quantities in a positioning calculation process are fully utilized, so that the calculation quantity of the steps of the whole method can be decreased, and therefore, the method can be applied to receivers which are low in processing speed and low in cost; the maximum value of the statistic quantities and circular detection are used in combination, and therefore, the calculation and use of fault satellite recognition thresholds can be avoided; and fault satellite detection and recognition of the satellite navigation receiver fault satellite detection method of the invention can achieve real-time detection, and therefore, the autonomous integrity of the receivers can be improved.

Description

Technical field [0001] The invention relates to a satellite navigation receiver fault star detection and identification method, belonging to the field of autonomous integrity monitoring of satellite navigation receivers, used for real-time discovery, identification and elimination of satellite fault data, and ensuring the perfect output of positioning results. Background technique [0002] With the rapid development of my country's Beidou satellite navigation system, satellite navigation positioning receivers are increasingly used in civil and military fields. While obtaining the positioning solution, the reliability of the positioning solution becomes more and more important. The main factors that cause the satellite positioning to be out of tolerance are large satellite clock drift, incorrect navigation message data and other satellite failures. The purpose of the autonomous integrity monitoring technology of satellite navigation receivers is to use the information of multiple...

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Application Information

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IPC IPC(8): G01S19/20
CPCG01S19/20
Inventor 白明杰朱根标张宪维项勇跃杜清荣张云飞王环环史占强蔡玉亭
Owner TIANJIN 764 COMM AIRMANSHIP
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