Neural Network-Guided Sparse Recovery for Interrupted-Sampling Repeater Jamming Suppression

Wang, Zijian; Yu, Wenbo; Yu, Zhongjun; Luo, Yunhua; Li, Jiamu

doi:10.1155/2021/5368600

Cited by 2 publications

(1 citation statement)

References 18 publications

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“…Nevertheless, this approach is limited by the contradiction between time resolution and frequency resolution in the TF transform, so it cannot accurately determine the extraction locations and the spectrum widths of the target range gates simultaneously. In [37], a new method for ISRJ suppression is proposed based on real target locating and recovery; the success rate of this method depends on the real target locating precision of the neural network. Although the method is limited to a single real target recovery, for the time being, it provides a new solution for ISRJ suppression.…”

Section: Introductionmentioning

confidence: 99%

A Novel Interrupted-Sampling Repeater Jamming Suppression Method Based on Time-Frequency Analysis and Target Sparse Reconstruction

Wang

et al. 2022

International Journal of Antennas and Propagation

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Interrupted-sampling repeater jamming (ISRJ) is a new kind of coherent jamming for linear frequency modulation (LFM) signals. Based on digital radio frequency memory (DRFM), ISRJ can generate multiple false target groups by intercepting, storing, and retransmitting radar signal fragments, which significantly affects the postprocessing results of radar systems. Furthermore, due to the fragment interception of ISRJ, ISRJ false targets present a regular and discontinuous time-frequency (TF) distribution in contrast with real targets. Considering this intrinsic property and the coherent nature of ISRJ, this study proposes a new method based on TF analysis and target sparse reconstruction to address the ISRJ suppression issue. In this method, the echo signal is first sparsely represented to obtain both the real and false target positions. Then, according to the acquired target positions, information entropy features of targets are extracted in TF data for subsequent target identification. Finally, guided by the identification result, the real targets can be retained and reconstructed by adaptive filtering in the sparse domain to realize ISRJ suppression. Simulations have validated the effectiveness of the proposed method under various situations.

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Section: Introductionmentioning

confidence: 99%

A Novel Interrupted-Sampling Repeater Jamming Suppression Method Based on Time-Frequency Analysis and Target Sparse Reconstruction

Wang

et al. 2022

International Journal of Antennas and Propagation

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Interrupted‐sampling repeater jamming suppression based on block sparse recovery and random phase encoding

Ji,

Wei,

et al. 2024

IET Radar Sonar & Navi

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The interrupted‐sampling repeater jamming (ISRJ) is an effective kind of intro‐pulse coherent jamming based on digital radio frequency memory. It appears as a group of false targets that are difficult to distinguish on the range profile after pulse compression, which seriously affects the target identification and tracking. According to the coherence between ISRJ and real target echo and the waveform discontinuity caused by intermittent interception, a new method is proposed for ISRJ parameter estimation and jamming suppression based on block sparse recovery. To ensure the effectiveness of sparse recovery, the transmitted signal is divided into several random phase‐encoded sub‐pulses. Firstly, the pulse‐number and time‐delay of the received echo are estimated by block orthogonal matching pursuit. Then, the jamming slices are identified based on the sampling duty ratio and the Doppler frequency is estimated through matching. Finally, according to the parameter estimation results, the jamming slices are reconstructed to eliminate ISRJ. Numerical experiments in two typical scenarios have shown that this method can effectively suppress ISRJ. Especially in the scenario of high jamming duty ratio, this method exhibits good anti‐jamming performance.

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Neural Network-Guided Sparse Recovery for Interrupted-Sampling Repeater Jamming Suppression

Cited by 2 publications

References 18 publications

A Novel Interrupted-Sampling Repeater Jamming Suppression Method Based on Time-Frequency Analysis and Target Sparse Reconstruction

A Novel Interrupted-Sampling Repeater Jamming Suppression Method Based on Time-Frequency Analysis and Target Sparse Reconstruction

Interrupted‐sampling repeater jamming suppression based on block sparse recovery and random phase encoding

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