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Beidou three-frequency cycle slip detection method, system and device suitable for low sampling rate

A cycle slip detection, low sampling rate technology, used in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc., can solve the problems of low cycle slip accuracy and low sampling rate, and eliminate geometric distances The effect of reducing the noise of observation and ensuring reliability

Pending Publication Date: 2021-02-02
NORTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP
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Problems solved by technology

[0005] In order to solve the problems existing in the prior art, the present invention provides a Beidou three-frequency cycle-slip detection method and device suitable for low sampling rates, which solves the problem of low accuracy of detecting small cycle-slips in the traditional three-frequency cycle-slip detection method

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  • Beidou three-frequency cycle slip detection method, system and device suitable for low sampling rate

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Embodiment Construction

[0050] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that the technical solutions claimed in this application can be realized even without these technical details and various changes and modifications based on the following implementation modes.

[0051] In order to make the purpose, technical solutions and advantages of the present application clearer, the implementation of the present application will be further described in detail below in conjunction with the accompanying drawings, including:

[0052] Step 1: Construct the first set of cycle-slip detection quantities (ultra-wide-lane combination)

[0053]

[0054] Since the wavelength of the ultra-wide-lane combination is very long, and other spatial correlation errors have been weakened or eliminated by the difference between epochs, the cycle slip of the ultra-wide-lane combination can ...

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Abstract

The invention discloses a Beidou three-frequency cycle slip detection method, system and device suitable for a low sampling rate, and the method specifically comprises the steps: constructing combinedobservation data according to a pseudo-range phase observation value: carrying out the epoch difference calculation of the combined observation data, and obtaining an ionospheric expansion factor corresponding to the pseudo-range and phase combined observation value, meanwhile, obtaining an observation noise expansion factor corresponding to the pseudo-range and phase combination observation value; based on the ionospheric expansion factor and the noise expansion factor of the combination observation value, respectively optimizing combination coefficients, and constructing an ultra-wide lanecombination, a wide lane combination and a narrow lane combination; constructing a nonlinear constraint equation set for resolving a narrow lane combination observation value coefficient, resolving, performing matrix operation, performing inverse computation on the cycle slip values of the ultra-wide lane combination, the wide lane combination and the narrow lane combination to obtain an originalfrequency phase observation value, and setting a group of nonlinear constraints, so that observation noise is reduced, the influence of a residual ionized layer is restrained, the influence of a geometric distance item is eliminated, and the reliability of a three-frequency cycle slip detection result is ensured.

Description

technical field [0001] The invention belongs to the field of data preprocessing of the Beidou satellite navigation system, and in particular relates to a Beidou three-frequency cycle-slip detection method, system and equipment suitable for low sampling rates. Background technique [0002] Due to obstacles between the satellite and the receiver or interference by abnormal signals during data reception, the satellite signal received by the receiver is out of lock, resulting in a full-cycle jump in the carrier phase observation value (referred to as cycle jump). Since cycle slip seriously affects the accuracy and reliability of dynamic positioning, cycle slip detection has become a key link in the field of GNSS (Global Navigation Satellite system) data preprocessing. On July 31, 2020, the Beidou-3 global satellite navigation system was officially put into operation. Since all satellites of the Beidou system provide tri-frequency data, the combination of tri-frequency data for ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/07G01S19/37G01S19/41
CPCG01S19/072G01S19/37G01S19/41
Inventor 高晓库新勃张海龙唐新庄
Owner NORTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP
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