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GNSS cascade adaptive multi-beam forming method

An adaptive, multi-beam technology, applied in the field of satellite navigation, can solve the problems of unfavorable receiver space, time and frequency three-dimensional integrated search and tracking, inability to exert the advantages of three-dimensional tracking, and high resource overhead, so as to improve system stability and improve system stability. Loop tracking sensitivity, the effect of enhancing interference suppression

Pending Publication Date: 2022-01-28
CSSC MARINE TECH CO LTD
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Problems solved by technology

However, the polling adaptive filtering process of this method requires adaptive filtering for each signal of the array, or the resource overhead is large or the real-time performance is poor, which is not conducive to engineering implementation, and the despreading and demodulation of satellite navigation signals cannot be improved before beamforming. The sensitivity of loop tracking (the key process of despreading and demodulation) is not conducive to the receiver's three-dimensional integrated search and tracking of space, time and frequency, and cannot take advantage of the three-dimensional tracking

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  • GNSS cascade adaptive multi-beam forming method
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  • GNSS cascade adaptive multi-beam forming method

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[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples, in order to understand the content of the patent application of the present invention more clearly, but the embodiments of the present invention are not limited thereto, and the patent of the present invention cannot be limited by this scope of protection.

[0036] Such as figure 1 As shown, the present invention is a GNSS cascaded adaptive multi-beam forming method, the purpose of which is to separate the anti-interference processing from the beam weighting, so that the anti-interference processing at the antenna end does not need the assistance of prior information such as satellite direction and antenna attitude, and the receiver end It is easy to achieve three-dimensional integrated search and tracking of space, time and frequency; at the same time, the array signal whitening process is completed by using the inversion of the autocorrelation sq...

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Abstract

The invention relates to a GNSS cascade adaptive multi-beam forming method and belongs to the field of satellite navigation. The method comprises two parts of whitening processing and beam forming, the whitening processing completes antenna end interference suppression, the beam forming completes receiver end beam forming, and the whitening processing comprises autocorrelation matrix calculation, autocorrelation matrix square root calculation, square root inversion operation and data conversion processing; the beam weighting comprises weight transformation processing and beam weighting. Compared with a traditional GNSS beam forming method, the scheme can separate anti-interference processing from beam weighting, so the anti-interference processing of an antenna end does not need to be assisted by prior information such as satellite direction and antenna attitude, and a receiver end is easy to achieve space, time and frequency three-dimensional integrated searching and tracking; and meanwhile, the autocorrelation matrix square root inversion algorithm adopted by the scheme is beneficial to improving the odd interference suppression degree of the autocorrelation matrix and improving anti-interference stability of the system.

Description

technical field [0001] The invention belongs to the field of satellite navigation, and in particular relates to a GNSS cascade adaptive multi-beam forming method. Background technique [0002] Global Navigation Satellite System (GNSS, Global Navigation Satellite System) is the pillar of the current satellite navigation field. With the development of satellite navigation jamming technology in modern naval battlefields, the strong suppression jamming power for satellite navigation receiver antennas is getting stronger and stronger. Traditional adaptive nulling antennas can only suppress suppressive interference but cannot increase signal power. [0003] The traditional adaptive beamforming technology in the existing technology combines anti-jamming and beamforming into one, and it is difficult to separate the two independent parts. The receiver needs to provide beamforming prior information for the anti-jamming antenna, and the receiver and the antenna are seriously coupled. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/37
CPCG01S19/37
Inventor 柳丰收刘召磊刘会森葛菁华李娟伟李冬冬程铭赵世佳侯岳麟
Owner CSSC MARINE TECH CO LTD
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