With the continuous development of radar jamming methods and styles, radar systems are facing more and more complex electromagnetic environment, resulting in limited suppression performance through spatial anti-jamming measures solely. In order to solve the problem, this paper proposes an anti-jamming method based on joint spatial-polarimetric processing for Frequency Diverse Array Multiple-Input Multiple-Output (FDA-MIMO) system. Firstly, the signal model of Polarimetric FDA-MIMO (PFDA-MIMO) is established. Based on this model, a joint spatial-polarimetric adaptive filtering method is proposed and experiments are carried out to demonstrate the advantages of joint spatial-polarimetric processing in anti-jamming. Compared to the filtering method that only utilizing the spatial information, this method has a better performance dealing with multidimensional jamming and improves the ability of FDA-MIMO in resisting main lobe jamming.
Synthetic Aperture Radar (SAR) is faced with complex electromagnetic environment in practical application, so it needs certain anti jamming ability. The SAR micro motion jamming can form false target string in the azimuth direction of SAR image, which makes it difficult to interpret SAR image. Therefore, based on the analysis of the principle of micro motion jamming, this paper proposes a SAR micro motion jamming discrimination method based on dual channel cancellation, and theoretically analyzes the feasibility of the algorithm. Finally, the effectiveness of the algorithm is verified by simulation.
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