Space-based radar electromagnetic spectrum environment cognition system and anti-interference method

A space-based radar and cognitive system technology, which is applied in the field of space-based radar electromagnetic spectrum environment cognition system and interference countermeasures, and can solve problems such as inability to extract interference signals.

Active Publication Date: 2019-12-27
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

However, the echo window of the space-based radar is almost full, and the radar channel is used to receive the interference si...

Method used

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  • Space-based radar electromagnetic spectrum environment cognition system and anti-interference method
  • Space-based radar electromagnetic spectrum environment cognition system and anti-interference method
  • Space-based radar electromagnetic spectrum environment cognition system and anti-interference method

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Embodiment

[0095] The simulation parameters are set as follows: the radar working center frequency is f 0 =1.3GHz, the wavelength is λ=23.08cm, the working signal bandwidth is B=10MHz, the main lobe of the radar system beam is directed to θ 0 =0°, the number of radar antenna array elements is N=24, the array element spacing is d=λ / 2, and the radar antenna length is L Radar =2.7692m. The azimuth scanning angle range of the radar beam is [-30°, 30°]. The passive reconnaissance antenna multiplexes M=12 radar antenna elements, so the antenna length of the space-based radar electromagnetic spectrum environmental awareness system is L=L Radar M / N=1.3846m. Suppose the incoming wave direction of interference 1 is θ 1 =-15°, the center frequency of the interference signal is 1.25GHz, the bandwidth is B1=20MHz (B1>B); the incoming wave direction of interference 2 is θ 2 =15°, the center frequency of the interference signal is 1.3GHz, and the bandwidth is B2=30MHz (B2>B). The signal forms of ...

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Abstract

The invention discloses a space-based radar electromagnetic spectrum environment cognition system and an anti-interference method. According to the method, the space-based radar electromagnetic spectrum environment cognition system is constructed on the basis of a space-based radar, fast beam scanning is performed on a task region continuously by multiple times through the space-based radar electromagnetic spectrum environment cognition system, signals outside a radar signal band range are intercepted from multiple collected signals for spectral analysis, the characteristics of pure interference signals are extracted, and band information of all the interference signals is acquired quickly; and information of the direction of arrival is estimated according to the change of each interference normalization power along with a beam scanning angle, electromagnetic spectrum environment perception prior information is obtained and fed back to the radar system in real time, and consequently the space-based radar system has an anti-interference ability and still maintains a target detection tracking ability even in a complicated electromagnetic environment. Through the method, the characteristics of the pure interference signals can be extracted rapidly, the direction of arrival of interference is estimated, interference information is fed back to the radar system in real time, and theanti-interference function of the system is achieved.

Description

technical field [0001] The invention relates to a space-based radar electromagnetic spectrum environment cognition system and an interference countermeasure method, belonging to the technical field of space-based radar anti-jamming. Background technique [0002] The orbit of space-based radar is known, so relevant parameters such as radar frequency and waveform are easily detected by enemy reconnaissance equipment, and electronic attacks are used to implement targeted electromagnetic interference on space-based radar. At present, in ground combat, electronic warfare (spectrum warfare) has become the fifth-dimensional combat space following the four-dimensional combat space of latitude, longitude, altitude, and time. Both enemy fighters and surface ships are equipped with special electronic warfare equipment. Capable of electronic warfare. Therefore, space-based radar must have the ability to quickly and real-time monitor the electromagnetic environment information within th...

Claims

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Application Information

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IPC IPC(8): G01S7/02G01S7/36
CPCG01S7/021G01S7/36
Inventor 黎薇萍杨晓超王渊李渝王伟伟朱江范一飞李奇
Owner XIAN INSTITUE OF SPACE RADIO TECH
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