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Anti-interference method

A signal and frequency domain technology, applied in the application field of satellite navigation technology, can solve the problems of complex algorithm, poor broadband interference suppression effect, difficult engineering implementation, etc., to achieve the effect of reducing the number of interference, good interference suppression effect, and clear division of labor

Inactive Publication Date: 2013-04-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] Time-domain and frequency-domain filtering have poor suppression effects on broadband interference; air-space anti-jamming technology can effectively suppress broadband interference, but it has certain requirements for the direction of interference signals and the direction of GNSS signals; space-time anti-jamming technology Compared with the pure airspace anti-jamming technology, it has a higher degree of freedom, but its algorithm is complex and difficult to realize in engineering, and like the pure airspace anti-jamming technology, it has certain requirements for the direction of the interference signal and the direction of the GNSS signal

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Embodiment Construction

[0015] The accompanying drawings disclose a system block diagram of the present invention and a schematic diagram of a specific embodiment without limitation, and the present invention will be further described below in conjunction with the accompanying drawings.

[0016] figure 1 The system block diagram of the satellite navigation receiver is given. The anti-jamming module of the satellite navigation receiver is placed after the radio frequency module. The anti-jamming module specifically completes the anti-jamming method proposed by the present invention.

[0017] The satellite navigation receiver anti-jamming method of the present invention specifically comprises the following steps: the signal output by each antenna array element of the radio frequency front end of the satellite navigation receiver is divided into two paths, denoted as: the first path signal and the second path signal; One channel of signal undergoes frequency domain anti-interference processing after se...

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Abstract

The invention discloses an anti-interference method. The anti-interference method particularly comprises the following steps: conducting frequency domain anti-interference processing to processed signals and then conducting space domain anti-interference processing to the processed signals. The frequency domain anti-interference processing is capable of restraining strong narrow-band interference. After the space domain anti-interference processing is conducted, broadband interference signals entering a receiver can be filtered. According to cascading frequency domain anti-interference and the space domain anti-interference, labor division of the frequency domain anti-interference and the space domain anti-interference are enabled to be clear, frequency domain trapped wave anti-interference is mainly used for restraining of narrow band interference, the number of interference entering the space domain anti-interference is reduced, the space domain anti-interference is enabled to be provided with more freedom degree to restrain the narrow band interference, and a good interference restraining effect is achieved.

Description

technical field [0001] The invention belongs to the application field of satellite navigation technology, in particular to a combined domain anti-jamming method for suppressing broadband, narrow-band and frequency-sweeping interference in a satellite navigation receiver. Background technique [0002] The satellite navigation system is composed of three parts: the satellite operating in the sky, the ground central station, and the user terminal. The main functions of a general satellite navigation system are positioning, timing, and communication. [0003] Since there is electromagnetic interference in the actual working environment of the satellite navigation receiver, and the satellites reaching the ground are very weak, the satellite navigation receiver is easily subject to various types of interference from the outside, especially man-made interference, which will eventually lead to poor positioning accuracy of the navigation system. The lowering does not even work prope...

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Application Information

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IPC IPC(8): G01S19/21
Inventor 张旭东何訸陈红光
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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