Quick star selection method based on Beidou satellite signal intensity weight optimization model

A technology of signal strength and optimization model, applied in the field of Beidou navigation, it can solve the problems of slow operation speed, large amount of calculation, inability to achieve convenience and speed, and achieve the effect of small storage space, accelerated calculation speed, and easy implementation.

Pending Publication Date: 2019-03-12
GUANGDONG UNIV OF TECH
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Problems solved by technology

[0004] However, due to the large amount of calculation and the slow operation speed of the current star selection method, the ideal effect of convenience and speed cannot be achieved.

Method used

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  • Quick star selection method based on Beidou satellite signal intensity weight optimization model
  • Quick star selection method based on Beidou satellite signal intensity weight optimization model
  • Quick star selection method based on Beidou satellite signal intensity weight optimization model

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Experimental program
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Embodiment 1

[0038] In the extreme case of occlusions, the information of eight satellites is obtained including the elevation angle φ N , depression angle ψ N , signal amplitude A N . List the data as follows:

[0039] satellite serial number

[0040] figure 1 Be the flow chart of the present invention, at first obtain bearing and strength matrix G by Beidou satellite signal strength weight optimization model, then eight satellites (N=8) data collected in the table above comprise the strength of each satellite carrier signal and the elevation angle φ i , azimuth ψ i , into the azimuth and intensity matrix G, without loss of generality, set the parameter g=1. Get G as follows:

[0041]

[0042]

[0043] After the satellite energy is calculated by the blind separation algorithm, the satellite L with the largest energy is obtained 1 is the maximum carrier signal energy A 1 For the corresponding satellites, the remaining three satellites are determined by non-negativ...

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Abstract

The invention discloses a quick star selection method based on a Beidou satellite signal intensity weight optimization model. The problem of low calculation efficiency in an existing method is solved.The method comprises the steps that firstly, through the Beidou satellite signal intensity weight optimization model, an orientation and intensity matrix G is obtained; a satellite with largest energy is obtained, and a quick, robust-recursive and separable non-negative matrix factorization algorithm is used for determining three remaining satellites; four satellites with highest signal intensityare selected for combining and optimizing the orientation and intensity matrix, and finally an optimum geometric accuracy factor is obtained. According to the quick star selection method, the satellites are selected by introducing a non-negative matrix factorization method, the calculation speed is increased, the calculation amount is reduced, the star selection efficiency is greatly improved, and meanwhile the precise star selection effect is also achieved.

Description

technical field [0001] The invention relates to the field of Beidou navigation, and more specifically, to a fast satellite selection method based on a Beidou satellite signal strength weight optimization model. Background technique [0002] With the continuous development and improvement of the Beidou satellite navigation system, the number of captured visible satellites has increased significantly, which will lead to an increase in the redundant information of the Beidou satellites in the navigation and positioning calculation, and the calculation amount of the navigation solution will be tens of times, which seriously affects the speed of navigation and positioning calculation. At the same time, the difficulty and cost of receiver hardware design will be greatly increased, and the engineering requirements for the number of channels and processing speed of multi-system receivers will also be improved. [0003] In addition, the Beidou satellite navigation system is more and...

Claims

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Application Information

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IPC IPC(8): G01S19/28
CPCG01S19/28
Inventor 谢胜利梁奕念吴宗泽白玉磊周郭许方乐由黄婷婷周凤
Owner GUANGDONG UNIV OF TECH
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