A Beidou single frequency carrier phase cycle slip detection method

A single-frequency carrier and cycle-slip detection technology, applied in radio wave measurement systems, measurement devices, satellite radio beacon positioning systems, etc., can solve the problem of inaccurate epoch positioning of small cycle-slip signals

Inactive Publication Date: 2017-12-12
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0004] The invention provides a cycle slip detection method of Beidou single-frequency carrier phase, which is used to solve the problem of inaccurate positioning of epochs where small cycle slip signals occur

Method used

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  • A Beidou single frequency carrier phase cycle slip detection method
  • A Beidou single frequency carrier phase cycle slip detection method
  • A Beidou single frequency carrier phase cycle slip detection method

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Embodiment 1

[0044] Example 1: Figure 1-3 As shown, a cycle slip detection method of Beidou single-frequency carrier phase, first use the phase subtraction pseudo-range method to calculate and construct the cycle slip signal for preliminary detection; then set the matrix dimension according to the singular value curve, and construct the Hankel matrix for the cycle slip signal , decompose the cycle slip signal by SVD; finally calculate the correlation coefficient between the original cycle slip signal and its SVD component signal and the correlation coefficient between the SVD component signal and the single-frequency carrier phase signal without cycle slip, and then construct the sensitivity factor and its difference spectrum, According to this, the sensitive SVD component is selected, and the positioning factor is set because the sensitive factor disrupts the order of the singular values, and the sudden singular value corresponding to the sensitive component signal is extracted through th...

Embodiment 2

[0070] Embodiment 2: The cycle slip detection method of a kind of Beidou single-frequency carrier phase first utilizes the phase subtraction pseudorange method to calculate and construct the cycle slip signal, and conducts preliminary detection; then set the matrix dimension according to the singular value curve, and perform the cycle slip signal The Hankel matrix is ​​constructed, and the cycle slip signal is decomposed by SVD; finally, the correlation coefficient between the original cycle slip signal and its SVD component signal and the correlation coefficient between the SVD component signal and the single-frequency carrier phase signal without cycle slip are calculated, and then the sensitivity factor and its The differential spectrum, based on which the sensitive SVD component is selected, and the positioning factor is set because the sensitive factor disrupts the order of the singular values, and the sudden singular value corresponding to the sensitive component signal is...

test Embodiment 502036091

[0071] Step 1. Use UltraEdit to open the dual-star five-frequency test case 502036091t.13O from Shanghai Sinan Navigation, and select 1200 sets of carrier phase observations and pseudorange observations in the Beidou B3 frequency band. The sampling interval of this frequency band is 1s, and the wavelength is 0.236 m;

[0072] Step 2. First, copy the carrier phase observation data and pseudorange observation data of the selected frequency band to an Excel table, subtract the pseudorange observation value from the carrier phase observation value, and calculate the difference between epochs to obtain the original Since the cycle slip signal is calculated in an Excel table, the .xls format file must be converted into a .mat format when the data is imported into MATLAB. The original cycle slip detection quantity (cycle slip signal) constructed is as follows figure 2 shown in figure 2 It can be seen that there are fluctuations of different magnitudes in the data taken. These fluc...

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Abstract

The invention relates to a Beidou single frequency carrier phase cycle slip detection method and belongs to the field of Beidou navigation signal processing. The method comprises the steps of: firstly, constructing cycle slip signals by using phase reduce pseudo-range law computation and performing primary detection; setting matrix dimensions according to a singular value curve, constructing a Hankel matrix for the cycle slip signals and performing SVD on the cycle slip signals; finally, calculating correlation indexes of the primitive cycle slip signals and SVD component signals thereof and correlation indexes of the SVD component signals and single frequency carrier phase signals without cycle slips added, building sensitive factors and a differential spectrum thereof, and selecting sensitive SVD components on the basis, wherein locating factors are set because the sensitive factors disrupt the order of singular values, sudden change singular values corresponding to sensitive component signals are extracted via the locating factors and signal reconstruction is performed; determining the epoch when cycle slips occur according to sudden change positions in the reconstructed signals. The method not only can detect smaller cycle slip signals but also can more accurately locate epochs when cycle slips occur.

Description

technical field [0001] The invention relates to a cycle-slip detection method of a Beidou single-frequency carrier phase, and belongs to the technical field of Beidou navigation signal processing. Background technique [0002] The Beidou Navigation System (BDS) is a global satellite positioning and communication system independently developed by China and capable of operating independently. At present, the system has been successfully widely used in many fields, and provides related positioning, navigation and timing services. However, in the process of application, because the carrier phase is interfered by various factors, the accuracy of navigation and positioning is not accurate enough, and cycle slip detection is a key step to improve the accuracy of satellite navigation and positioning. [0003] The cycle slip signal is regarded as an abnormal value in the signal, and many abnormal signal detection methods are applied to cycle slip detection, such as Empirical Mode De...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/44G01S19/37
CPCG01S19/37G01S19/44
Inventor 黄国勇牟竹青吴建德王晓东范玉刚邹金慧冯早
Owner KUNMING UNIV OF SCI & TECH
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