A space-based radar electromagnetic spectrum environment cognition system and interference countermeasure method

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

Active Publication Date: 2021-11-16
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 signal and the echo signal at the same time, and the characteristics of the interference signal cannot be extracted in the time domain.

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  • A space-based radar electromagnetic spectrum environment cognition system and interference countermeasure method
  • A space-based radar electromagnetic spectrum environment cognition system and interference countermeasure method
  • A space-based radar electromagnetic spectrum environment cognition system and interference countermeasure 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

A space-based radar electromagnetic spectrum environment cognition system and interference countermeasure method. A space-based radar electromagnetic spectrum environment cognition system is constructed on the basis of space-based radar. The space-based radar electromagnetic spectrum environment cognition system continuously monitors the mission area for many times. Carry out fast beam scanning, intercept signals outside the frequency band of radar signals for spectrum analysis on the signals collected multiple times, extract the characteristics of pure interference signals, and quickly obtain the frequency band information of all interference signals; according to the normalized power of each interference The change of the beam scanning angle is used to estimate the incoming wave direction information, obtain the prior information of the electromagnetic spectrum environment perception, and feed it back to the radar system in real time, so that the space-based radar system has the ability to resist interference and maintain the ability to detect and track targets in complex electromagnetic environments. The invention can quickly extract the characteristics of the pure interference signal, estimate the incoming wave direction of the interference, feed back the interference information to the radar system in real time, and realize the function of system interference countermeasures.

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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Patent Type & Authority Patents(China)
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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