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A time-domain self-adaptive anti-mainlobe self-defense jamming method and system

A self-adaptive, time-domain technology, applied in radio wave measurement systems, instruments, etc., can solve the problem of difficulty in combating SMSP interference, and achieve the effect of easy filtering of interference, improved effect, and good suppression effect.

Active Publication Date: 2022-04-29
AIR FORCE EARLY WARNING ACADEMY
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Problems solved by technology

[0005] For this reason, the present invention provides a kind of time-domain self-adaptive anti-main lobe self-defense jamming method and system, in order to overcome multiple time-frequency tools involved in the frequency modulation slope that must estimate the jamming in countering SMSP jamming in the prior art, cause countermeasure SMSP interference is difficult to achieve

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[0047] In order to make the objects and advantages of the present invention clearer, the present invention will be further described below in conjunction with the examples; it should be understood that the specific examples described here are only for explaining the present invention, and are not intended to limit the present invention.

[0048] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.

[0049] In addition, it should be noted that, in the description of the present invention, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a It is a detachable connection ...

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Abstract

The invention relates to a time-domain self-adaptive anti-mainlobe self-defense interference method and system, which extracts the interfered pulse data segment by using the sum channel of the radar, then demodulates the transmitted signal, and then performs band-pass filtering according to the frequency band to realize out-of-band interference Suppression, and then use the time-domain adaptive clipping method to suppress the in-band interference, and then realize the detection of the target through modulation and pulse compression, and finally the distance and speed information of the target can be obtained. The present invention utilizes the prior information that the modulation frequencies of the transmitted signal and the interference signal are inconsistent, and realizes the suppression of the main lobe self-defense SMSP interference by means of demodulation, filtering, amplitude limiting and modulation, which not only avoids the complicated operation of estimating the interference modulation frequency, but also The main lobe interference can be suppressed adaptively, and the invention can be widely used in all radars using linear frequency modulation signals, and has a relatively small calculation amount, which is convenient for realization and popularization.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to a time-domain self-adaptive anti-mainlobe self-defense interference method and system. Background technique [0002] Radar and electronic countermeasures are a pair of contradictions in motion. When a new radar technology appears, many countermeasure technologies will appear, which will also give birth to new radar anti-jamming technologies. The initial radar usually uses a single carrier frequency pulse train, which solves the problem of radar detecting flying targets, but this kind of pulse train will bring an irreconcilable contradiction, that is, the far-sightedness and distance resolution cannot be taken into account under the same conditions. Therefore, on this basis, a pulse compression signal is developed, which compresses a signal with a wider time width into a signal with a high peak power but a narrow pulse width through pulse compression processing, wh...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 陈辉张昭建周必雷
Owner AIR FORCE EARLY WARNING ACADEMY
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