Improved Blanket Jamming Against ISAR Based on Nonperiodic Interrupted Sampling Modulation

Liu, Zhidong; Zhang, Qun; Li, Guangming; Li, Kaiming; Wang, Dan

doi:10.1109/jsen.2020.3014650

Cited by 15 publications

(5 citation statements)

References 17 publications

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“…Without loss of generality, the real motion of a target should include translational and rotating parts. However, because the translational component does not contribute to radar azimuth imaging, the target motion model is usually equivalent to the rotating motion model through translational compensation in the ISAR imaging process [28][29][30][31]. Based on the above assumption, the spatial geometric positions of the radar, jammer, and detected target are shown in Figure 1.…”

Section: Signal Modelmentioning

confidence: 99%

An Anti-Jamming Method against Two-Dimensional Deception Jamming by Spatial Location Feature Recognition

Liu

Zhang

2021

Sensors

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Interrupted sampling repeater jamming (ISRJ) is an effective method for implementing deception jamming on chirp radars. By means of frequency-shifting jamming processing of the target echo signal and pulse compression during image processing, a group of false targets will appear in different spatial locations around the true target. Extracting the features of these false targets is complex and limited to existing countering methods against ISRJ. This paper proposes an anti-jamming method to identify the spatial location characteristics of two-dimensional deception false targets. By adjusting the parameters of the radar transmitted signal, the method simultaneously transmits the anti-jamming signal and carries out false target identification and elimination in the range and azimuth dimensions. Eventually, the optimal signal parameter design of the anti-jamming signal is obtained by comparing different anti-jamming strategies in the range dimension. The validity of the proposed method is proved by deducing the mathematical model between the spatial distribution characteristics of the false targets and the radar transmitted signal parameters and demonstrated by simulations.

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Section: Signal Modelmentioning

confidence: 99%

An Anti-Jamming Method against Two-Dimensional Deception Jamming by Spatial Location Feature Recognition

Liu

Zhang

2021

Sensors

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“…Feng et al [7] further demonstrated the effectiveness of the ISRJ against de-chirp radar. The jamming methods against wideband radar are detailedly discussed for synthetic aperture radar (SAR) [8,9] and ISAR [10,11]. It is demonstrated that the vivid false targets can be generated in the ISAR image by ISRJ technique [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…The jamming methods against wideband radar are detailedly discussed for synthetic aperture radar (SAR) [8,9] and ISAR [10,11]. It is demonstrated that the vivid false targets can be generated in the ISAR image by ISRJ technique [10,11]. Recently, a novel jamming method using nonperiodic ISRJ technique is proposed.…”

Section: Introductionmentioning

confidence: 99%

Nonperiodic interrupted sampling repeater jamming suppression for inverse synthetic aperture radar

Qihua,

Feng,

Tiehua

et al. 2024

J. of Syst. Eng. Electron.

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Nonperiodic interrupted sampling repeater jamming (ISRJ) against inverse synthetic aperture radar (ISAR) can obtain two-dimensional blanket jamming performance by joint fast and slow time domain interrupted modulation, which is obviously different from the conventional multi-false-target deception jamming. In this paper, a suppression method against this kind of novel jamming is proposed based on inter-pulse energy function and compressed sensing theory. By utilizing the discontinuous property of the jamming in slow time domain, the unjammed pulse is separated using the intra-pulse energy function difference. Based on this, the two-dimensional orthogonal matching pursuit (2D-OMP) algorithm is proposed. Further, it is proposed to reconstruct the ISAR image with the obtained unjammed pulse sequence. The validity of the proposed method is demonstrated via the Yake-42 plane data simulations.

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“…INUSRJ, as an improved version of ISRJ [23], is often employed to interfere with inverse synthetic-aperture radar [24,25]. Wu et al [26] proposed an interference suppression method combining the inter-pulse energy function with compressed-sensing technology.…”

Section: Introductionmentioning

confidence: 99%

An Attention-Guided Complex-Valued Transformer for Intra-Pulse Retransmission Interference Suppression

Wang,

Li,

Zhou

et al. 2024

Remote Sensing

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With the maturation of digital radio frequency memory (DRFM) technology, various intra-pulse retransmission interference methods have emerged. These flexible and changeable retransmission interference methods pose significant challenges to radar detection tasks, particularly in modern battlefields. This paper proposes an attention-guided complex-valued transformer (AGCT) as a solution. First, the encoder maps the received signal contaminated by interference and noise into a high-dimensional space. Then, the dilated convolution block (DCB) group and attention block (AB) group in the mask estimator extract the delicate multi-scale features and large-scale features of the interference, respectively, to obtain a multidimensional space mask. Finally, the decoder restores interference to the time domain and outputs the estimated target echo using residual learning. Considering the characteristics of intra-pulse interference, we introduced the energy attention block (EAB) at the end of the DCBs and the ABs within our network. This addition ensures a heightened focus on extracting interference features. Furthermore, we implemented a curriculum learning strategy during the network training. This approach gradually acclimates the network to fit different types of retransmission interference, starting from simpler to more complex scenarios. Our extensive experiments, conducted under various conditions, have provided compelling evidence of the AGCT’s superior performance. Compared to the comparative network, the AGCT’s advantages are particularly pronounced under more harsh conditions, demonstrating its robustness and effectiveness.

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Improved Blanket Jamming Against ISAR Based on Nonperiodic Interrupted Sampling Modulation

Cited by 15 publications

References 17 publications

An Anti-Jamming Method against Two-Dimensional Deception Jamming by Spatial Location Feature Recognition

An Anti-Jamming Method against Two-Dimensional Deception Jamming by Spatial Location Feature Recognition

Nonperiodic interrupted sampling repeater jamming suppression for inverse synthetic aperture radar

An Attention-Guided Complex-Valued Transformer for Intra-Pulse Retransmission Interference Suppression

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