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Space frequency anti-jamming method and application system in satellite navigation application system

An application system and satellite navigation technology, applied in the field of satellite navigation, can solve the problem of anti-multi-narrowband interference that cannot be filtered out, and achieve the effect of small design and strong practicability

Active Publication Date: 2021-08-13
BEIJING SATELLITE INFORMATION ENG RES INST
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an anti-jamming method for space frequency in a satellite navigation application system that can effectively eliminate the problem that anti-multi-narrowband interference cannot be filtered out

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  • Space frequency anti-jamming method and application system in satellite navigation application system
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  • Space frequency anti-jamming method and application system in satellite navigation application system

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Embodiment Construction

[0039] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0040] Such as figure 1As shown, the block diagram of the existing space-frequency anti-jamming algorithm is given. The space-frequency anti-jamming algorithm is processed after the RF front end. The signal received by the array antenna outputs an intermediate frequency analog signal through the RF module, and the digital signal is obtained through AD sampling, and then the Anti-jamming algorithm processing, anti-jamming processing. It mainly includes six steps: sampling / buffering, windowing processing, DFT, anti-jamming filtering processing at each frequency point, IDFT, and inverse windowing processing, but there is no narrow-band filtering step between anti-jamming filtering processing at each frequency point and IDFT.

[0041] Such as figure 2 As shown, the present invention designs a space-frequency anti-jamming ...

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Abstract

The present invention relates to a space-frequency anti-jamming method and application system in a satellite navigation application system. By adding a narrow-band filter module after each frequency-point anti-jamming filter processing module and before the inverse Fourier transform module, the current space-frequency anti-jamming solution can be solved. The anti-multi-narrowband interference that exists in the algorithm can't be filtered out; the whole process of the present invention can be integrated in the FPGA and realizes, which is conducive to the miniaturization design of the device; the method of the present invention is applicable to military fields such as missiles, bombs, aircraft, ships Advanced satellite navigation equipment has strong practicability.

Description

technical field [0001] The invention relates to a space frequency anti-jamming method in a satellite navigation application system and an application system, belonging to the technical field of satellite navigation. Background technique [0002] Satellite technology plays an increasingly important role in modern life, but due to the extremely weak satellite navigation signal (-130dBm), the equipment is very vulnerable to various natural or man-made interferences and cannot work. Therefore, it is necessary to introduce array antenna anti-interference technology To improve the anti-jamming ability of the satellite navigation system. [0003] There are narrow-band, broadband, frequency-sweeping, and pulse signals in the types of interference, and there are single-interference and multi-interference forms in the number of interferences. In order to improve the performance of anti-broadband interference and multi-interference, the space-time / frequency domain joint method is gener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/21G01S19/37
CPCG01S19/21G01S19/37
Inventor 徐振兴刘鹏陈耀辉魏婵娟王宏伟车欢
Owner BEIJING SATELLITE INFORMATION ENG RES INST