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Main lobe anti-jamming method combined with JADE and CLEAN

A main lobe and interference signal technology, applied in the field of blind source separation and anti main lobe interference, can solve the problem that the angle measurement function cannot be realized

Active Publication Date: 2018-07-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

The document [Gaoming Huang, Lvxi Yang, Zhenya He. Blind sources separation used for radar anti-jamming. 2003 International Conference on Neural Networks & Signal Processing, 1382-1385, 2003] is the first paper at home and abroad to apply blind source separation to radar anti-jamming processing In this method, the blind source separation algorithm based on Gaussian moments is used to separate the interference signal from the target echo signal, but this method only realizes the separation of the radar signal and the interference signal, and the recovered radar signal can only realize the detection function, while using The separated radar signal will not be able to realize the angle measurement function

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  • Main lobe anti-jamming method combined with JADE and CLEAN
  • Main lobe anti-jamming method combined with JADE and CLEAN
  • Main lobe anti-jamming method combined with JADE and CLEAN

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Embodiment Construction

[0053] step 1:

[0054] Assuming that there are M target signals and P high-power interference signals independent of each other in the space, and the difference in the direction of arrival between the target signal and the interference signal is within the angle range of the main lobe, they are incident on a space array at the same time, and the array consists of L consists of array elements, and assuming that both the target signal and the interference signal are far-field narrowband signals, the received signal of the lth array element at time t is:

[0055]

[0056] Among them, s m (t), m=1,2,..., M is the mth target signal, θ Tm is the direction of arrival of the corresponding target signal, J p (t),p=1,2,...,P is the Pth interference signal, θ Jp is the direction of arrival of the corresponding interference signal, n(t) represents the noise signal at time t, T represents the total number of samples, d represents the distance between array elements, and λ is the wor...

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Abstract

The invention discloses a main lobe anti-jamming method combined with JADE and CLEAN, and belongs to the technical field of radar interference resistance, in particular to a blind source separation anti-main lobe interference technique. The method comprises steps of firstly using the JADE algorithm to estimate the steering vector and the waveform of the interference signal, and then reconstructingthe interference array signal; calculating the MUSIC spectrum of the reconstructed interference array signal to obtain the MUSIC spectrum containing only the interference signal; finally, offsettingthe MUSIC spectrum of the interference signal on the MUSIC spectrum of the received signal using the CLEAN algorithm in the airspace, thereby obtaining the direction of arrival estimation of the target signal. The simulation results show that the method can complete the interference suppression well and estimate the target DOA.

Description

technical field [0001] The invention belongs to the technical field of radar anti-jamming, in particular to blind source separation anti-mainlobe jamming technology. Background technique [0002] In modern electronic warfare, it has become a severe task for radar designers to do everything possible to improve the anti-jamming performance of radar. In order to improve the survivability of radar in complex electromagnetic interference environment, various anti-interference measures such as ultra-low sidelobe, sidelobe concealment and sidelobe cancellation have been adopted. However, when the interference signal enters the radar antenna from the main lobe, it will seriously affect the detection performance of the radar, and the traditional sidelobe anti-interference measures will not be effective against the main lobe interference. Therefore, in order to ensure the correct detection and tracking of radar targets in complex electromagnetic environments, it is of great theoretic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 崔国龙葛萌萌陈芳香时巧余显祥孔令讲杨晓波易伟张天贤
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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