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GNSS Navigation Satellite Signal Anti-jamming Processing Method

A technology for navigating satellites and signals, used in satellite radio beacon positioning systems, advanced technology, climate sustainability, etc.

Active Publication Date: 2022-07-08
10TH RES INST OF CETC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to improve the anti-jamming capability of the satellite navigation signal receiving system in a complex electromagnetic environment. For this reason, the present invention proposes a navigation satellite signal anti-jamming method based on adaptive array signal processing

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Embodiment Construction

[0011] The present invention will be further elaborated below in conjunction with specific embodiments.

[0012] see figure 1 . According to the present invention, the array antenna first converts the received GNSS navigation satellite radio frequency signal into a digital intermediate frequency sampling signal through the AD / DA processing chip, and the AD / DA processing chip sends the digital intermediate frequency sampling signal into the signal and data processing module, and passes through the digital intermediate frequency sampling signal. After down-conversion processing, the I and Q sampling data streams are buffered and controlled, and the autocorrelation matrix is ​​obtained by calculating the statistical average of the products of the selected I and Q sampling data and their conjugate transposes; and then according to the power inversion (PI) ) criterion, calculate the optimal weight coefficient of the DBF for digital beamforming; multiply the DBF weight coefficient ...

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Abstract

A GNSS navigation satellite signal anti-jamming method disclosed by the present invention aims to improve the anti-jamming capability of a satellite navigation signal receiving system. The processing chip is converted into a digital intermediate frequency sampling signal, and the digital intermediate frequency sampling signal is sent to the signal and data processing module. After digital down-conversion processing, data buffering and extraction control are performed on the obtained I and Q sampling data streams. The product of Q sampling data and its conjugate transpose is calculated by statistical averaging to obtain the autocorrelation matrix; then according to the power inversion criterion, the optimal weight coefficient of digital beamforming is calculated; the I and Q data for DBF synthesis processing are obtained; finally, the DBF is synthesized The latter digital intermediate frequency signal is input to the analog-to-digital / digital-analog processing chip for analog up-conversion processing, and the anti-jamming processed GNSS radio frequency signal is sent to the receiver for navigation and positioning.

Description

technical field [0001] The invention relates to the field of signal processing and navigation, in particular to a satellite navigation anti-jamming signal processing technology in the civil field. Background technique [0002] The Global Navigation Satellite System (GNSS) is more than 20,000 kilometers away from the earth, and the signal power reaching the earth is very small, which makes the satellite navigation signal receiving system vulnerable to interference. In the civilian field, with the continuous increase of various communication systems and wireless data transmission systems, the electromagnetic environment is also becoming more and more complex. Although these systems themselves may not be in the GNSS frequency band, the intermodulation products and out-of-band transmission of signals may affect GNSS. The reception of the signal causes interference, which can lead to reduced navigation accuracy or complete loss of receiver lock. [0003] At present, the anti-jam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/21
CPCG01S19/21Y02D30/70
Inventor 班亚龙康荣雷杨少帅王海砚安毅熊杰彭涛
Owner 10TH RES INST OF CETC
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