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A four-frequency cycle-slip detection and repair method based on linear combination optimization

A technology of cycle slip detection and linear combination, which is applied in the direction of radio wave measurement system, measurement device, satellite radio beacon positioning system, etc., to achieve the effect of reducing ionospheric delay

Active Publication Date: 2021-08-27
NAT UNIV OF DEFENSE TECH
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  • Claims
  • Application Information

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Problems solved by technology

However, the current research on cycle slip detection and repair based on four-frequency observation data is still basically blank. It is necessary to perform linear combination optimization based on four-frequency observation data, give full play to the information redundancy brought by four-frequency observation data, and provide cycle slip detection and repair probability.

Method used

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  • A four-frequency cycle-slip detection and repair method based on linear combination optimization
  • A four-frequency cycle-slip detection and repair method based on linear combination optimization
  • A four-frequency cycle-slip detection and repair method based on linear combination optimization

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Embodiment 1

[0099] In this embodiment: the satellite navigation system is the Beidou system, and the four frequency points of the Beidou system correspond to its B1I, B1C, B2a and B3I respectively, and the frequencies of the frequency points B1I, B1C, B2a and B3I are respectively f 1 , f 2 , f 3 , f 4 . Using the four-frequency cycle-slip detection and repair method based on linear combination optimization provided by the present invention, four sets of cycle-slip detection linear combinations of the Beidou system and the corresponding four sets of cycle-slip detection linear combination detection quantities are constructed to restore the four frequency points of the Beidou system. cycle slip value.

[0100] 1) After linear combination optimization, the carrier coefficients (i, j, k, t) of the first group of cycle slip detection linear combination of the Beidou system are taken as (-1, 1, 0, 0), and the Beidou system is constructed according to formula (1) The first linear combination...

Embodiment 2

[0135] In the present embodiment, the satellite navigation system is the Galileo system, and the four frequency points of the Galileo system correspond to its E1, E5a, E5b and E6 respectively, and the frequencies of the frequency points E1, E5a, E5b and E6 are respectively f 1 , f 2 , f 3 , f 4 . Using the four-frequency cycle-slip detection and repair method based on linear combination optimization provided by the present invention, construct four sets of cycle-slip detection linear combinations of the Galileo system and corresponding four sets of cycle-slip detection linear combination detection quantities, and restore the four frequency points of the Galileo system. cycle slip value.

[0136] 1) After linear combination optimization, the carrier coefficients (i, j, k, t) of the first group of cycle slip detection linear combination of the Galileo system are taken as (0, -1, 1, 0), and the Galileo system is constructed according to the formula (1) The first linear combin...

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Abstract

The present invention proposes a four-frequency cycle slip detection and repair method based on linear combination optimization. Based on four-frequency observation data, with the goal of maximizing the fixed probability, four groups of linear combinations are optimized for cycle slip detection and repair. The current cycle slip detection and repair method is mainly based on the three-frequency observation value, and there is no cycle slip detection and repair method based on the four-frequency observation value. The information redundancy brought by the four-frequency observation data is of great significance to improve the positioning accuracy.

Description

technical field [0001] The invention relates to the technical field of high-precision data processing of a satellite navigation system, in particular to a four-frequency cycle slip detection and repair method. Background technique [0002] The accuracy of carrier phase observation is much higher than that of pseudorange, and it has a wide range of applications in the field of high-precision data processing of satellite navigation systems. In the actual environment, due to interference, occlusion and other factors, the carrier phase will jump throughout the whole cycle, which is generally called cycle jump. The occurrence of cycle slips breaks the continuity of carrier phase, and cycle slip detection and repair must be performed before using carrier phase for high-precision positioning calculations. [0003] Current cycle slip detection and repair methods are mainly based on tri-frequency observation data. With the construction of the Beidou global system, Beidou can broadc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/37
CPCG01S19/37
Inventor 张可王耀鼎刘文祥李峥嵘王飞雪楼生强刘增军李井源黄龙牟卫华
Owner NAT UNIV OF DEFENSE TECH
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