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Anti-interference method, unit and system

A technology for de-jamming and interfering signals, which is applied in the field of signal communication, can solve the problems of high power consumption and resource usage, achieve low power consumption, solve the problem of using more resources, and realize the effect of power consumption

Active Publication Date: 2019-12-10
北京华力创通科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide an anti-interference method, unit and system to solve the technical problems of using many resources and high power consumption in the conventional anti-narrowband interference method in the prior art

Method used

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  • Anti-interference method, unit and system

Examples

Experimental program
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Embodiment 1

[0047] An anti-jamming method provided by an embodiment of the present invention can be applied to the anti-narrowband interference process of satellite navigation signals or satellite communication signals, such as figure 1 As shown, the method includes:

[0048] S11: Scanning the frequency of the signal with interference to obtain the frequency of the local oscillator signal.

[0049] As a preferred implementation manner of this embodiment, the frequency of the interference signal and the frequency of the local oscillator signal are obtained after scanning the frequency of the signal with interference, where the local oscillator signal may be an orthogonal local oscillator signal.

[0050] S12: Perform frequency down-conversion processing on the signal with interference by using the frequency of the local oscillator signal to obtain a baseband signal.

[0051] Specifically, frequency mixing is performed on the signal with interference and the local oscillator signal, and qu...

Embodiment 2

[0061] An anti-jamming method provided by an embodiment of the present invention can be applied to the anti-narrowband interference process of satellite navigation signals or satellite communication signals, such as figure 2 As shown, the method includes:

[0062] S21: Scanning the frequency of the signal with interference to obtain the frequency of the local oscillator signal.

[0063] Specifically, after scanning the frequency of the signal with interference, the frequency of the interference signal and the frequency of the local oscillator signal are obtained, where the local oscillator signal may be an orthogonal local oscillator signal. Therefore, in this step, the quadrature local oscillator signal can be generated by sweeping the frequency of the input satellite signal with interference.

[0064] Such as image 3 As shown, the input signal with interference is Data_in(I,Q), the in-phase baseband signal is Base_I, and the quadrature baseband signal is Base_Q. Base_I a...

Embodiment 3

[0082] An anti-jamming unit provided by an embodiment of the present invention can be applied to the anti-narrowband interference method of satellite navigation signals or satellite communication signals, such as Figure 7 As shown, the anti-jamming unit 3 includes: a frequency sweeping module 31 , a frequency down conversion module 32 , a CIC filter module 33 , a difference making module 34 and an up conversion module 35 .

[0083] As a preferred implementation of this embodiment, the frequency scanning module 31 is configured to perform frequency scanning on a signal with interference to obtain frequencies of the interference signal and the local oscillator signal. Wherein, the local oscillator signal obtained by the frequency sweep module 31 may be an orthogonal local oscillator signal.

[0084] Further, the down-conversion module 32 is used for down-converting the signal with interference by using the frequency of the local oscillator signal to obtain the baseband signal. ...

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Abstract

The invention provides an anti-interference method, unit and system, and relates to the technical field of signal communication. The method comprises: sweeping the frequency of signals with interference to obtain the frequency of intrinsic signals; performing down-conversion on the signals with interference via the frequency of the intrinsic signals to obtain baseband signals; performing cascaded integrator-comb (CIC) filtering on the baseband signals to obtain the interfering signals; subtracting the interfering signals from the baseband signals to obtain interference removed baseband signals; and performing up-conversion on the interference removed baseband signals via the frequency of the intrinsic signals to obtain anti-interference intermediate-frequency signals, thereby solving the technical problems of many resources used and high power consumption of the conventional anti-narrowband-interference method in the prior art.

Description

technical field [0001] The present invention relates to the technical field of signal communication, in particular to an anti-jamming method, unit and system. Background technique [0002] With the development of science and technology, electronic countermeasures in modern communication and satellite navigation are becoming more and more acute. The anti-interference ability of communication system and satellite navigation system will directly determine the effectiveness and stability of the system. The implementation structure of the high-power narrow-band jamming transmitter is relatively simple, and a few narrow-band jamming signals can cover a certain frequency band. [0003] In addition, the wireless signals in the public environment are becoming more and more complex, and the transmission frequency or multiple harmonics of the transmission frequency of each wireless signal may fall within the frequency band of the satellite navigation signal, causing unintentional inter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/10
CPCH04B1/1036
Inventor 易炯蔡乃小
Owner 北京华力创通科技股份有限公司