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| An Anti-mainlobe Jamming Method for Fuzes Based on Oblique Projection |
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| DOI：10.7643/issn.1672-9242.2022.11.002 |
| KeyWord:filtering anti-jamming mainlobe jamming polarization array joint spectrum estimation oblique projection |
| Author | Institution |
| ZHANG Xiang |
Science and Technology on Electromechanical Dynamic Control Laboratory, Xi'an, China |
| CHEN Nan-qi |
Science and Technology on Electromechanical Dynamic Control Laboratory, Xi'an, China |
| ZHANG Ke |
Science and Technology on Electromechanical Dynamic Control Laboratory, Xi'an, China |
| WANG Zhong-yang |
Science and Technology on Electromechanical Dynamic Control Laboratory, Xi'an, China |
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| Abstract: |
| For the problem that the incidence angle of the expected signal of an antenna array and the mainlobe jamming signal are the same, which leads to the null domain filtering anti-jamming failure, the signal polarization domain information can be used to filter out the jamming, but the polarization state of the mainlobe jamming signal is usually unknown, and for this reason, a polarization array anti-mainlobe jamming method based on oblique projection is proposed. The anti-mainlobe jamming method of polarized array based on oblique projection uses the polarization domain and space domain joint spectral multi-signal classification algorithm to estimate the polarization state of the mainlobe jamming signal. Then, the difference between the polarization state of the desired signal and the mainlobe jamming signal is used to filter out the mainlobe jamming signal by constructing a skew projection operator to process the array received data. The simulation experiments showed that when the mainlobe interference guide vector is mismatched, or when the polarization state of the desired signal and the mainlobe interference signal meet a certain degree of difference, the polarization array mainlobe anti-jamming method based on oblique projection achieves good results. It can be concluded that the anti-mainlobe jamming method of polarization array based on oblique projection achieves good results, with good stability, robustness and other advantages. The method can be applied to radar, radio fuze and other systems to suppress mainlobe interference and improve the ability of radar, radio fuze and other systems to adapt to complex electromagnetic environment. |
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