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Method of Array Anti-multipath of Satellite Navigation Signal Based on Matrix Reconstruction Algorithm

A satellite navigation signal and reconstruction algorithm technology, which is applied in the fields of satellite navigation anti-multipath and satellite navigation positioning, can solve the problems of large amount of calculation in iterative processing, sacrificing array information, and high requirements for carrier measurement accuracy, and achieve good suppression effect. The effect of simplifying the platform structure

Active Publication Date: 2022-08-09
NAVAL AVIATION UNIV
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Problems solved by technology

Therefore, this algorithm will sacrifice useful array information, and the calculation of iterative processing is large, and the accuracy of carrier measurement is too high.

Method used

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  • Method of Array Anti-multipath of Satellite Navigation Signal Based on Matrix Reconstruction Algorithm
  • Method of Array Anti-multipath of Satellite Navigation Signal Based on Matrix Reconstruction Algorithm
  • Method of Array Anti-multipath of Satellite Navigation Signal Based on Matrix Reconstruction Algorithm

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Embodiment Construction

[0037] The satellite navigation system is divided into the American GPS system, the Russian GLONASS system, the Chinese BDS system and the European "Galileo" system. The main difference in the present invention is the difference of the radio frequency frequency and the difference of the pseudocode correlation time, and the influence on the algorithm is the array. The difference in spacing and the integration time of the navigation signal preprocessing are different. In the specific implementation, the more common GPS / L1 signal is selected as an example.

[0038] In the actual environment, the number of signals generated by multipath cannot be determined for the real received satellite navigation signals, and the multipath amplitude and phase are difficult to quantify. Therefore, a transmitter that simulates real satellite signals and multipath signals is used to build a semi-physical system for space transmission and reception. The anti-multipath platform implements the algori...

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Abstract

The invention discloses an array anti-satellite navigation signal multipath method based on a matrix reconstruction algorithm, which belongs to the field of satellite navigation and positioning. Through the matrix reconstruction processing algorithm, the satellite navigation signals immersed in noise can be directly applied after being processed. Based on the array signal theory, the signal received by the array acquisition system is processed by matrix reconstruction, incoming wave direction estimation and beamforming weighting to form an antenna array in which the main beam is aligned with the satellite direct signal and the null position is aligned with the multipath signal. The direction map can achieve the purpose of enhancing the direct signal of the satellite and suppressing the multipath. The invention does not need inertial navigation assistance to determine the attitude of the array platform, the improved beam forming criterion has a small calculation amount, reduces the calculation amount of the array anti-multipath algorithm, and has better suppression of the multipath that is difficult to remove with small chip delay. Effect.

Description

technical field [0001] The invention belongs to the field of satellite navigation and positioning, in particular to the field of satellite navigation anti-multipath, and in particular relates to an array anti-multipath algorithm for matrix reconstruction of satellite navigation signals Background technique [0002] The application of satellite navigation and positioning systems is becoming more and more extensive, and users have higher and higher requirements for positioning accuracy. Research on various error sources of satellite navigation systems and methods and technologies to reduce their influence on receivers are also increasing deeper. At present, the error sources that affect the positioning accuracy mainly include satellite clock error and orbit error, ionospheric delay, tropospheric delay, interference and multipath. Among them, errors such as satellite clock error, orbital error, ionospheric and tropospheric delay are related in time and space, and can be correc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/22
CPCG01S19/22
Inventor 张润萍任永吉邱丽原李蔚
Owner NAVAL AVIATION UNIV
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