Simulation of two-dimensional ISAR decoys on a moving platform

Pan, Xiaoyi; Wang, Wei; Fu, Qun; Guo-yu, Wang

doi:10.1109/jsee.2015.00030

Cited by 6 publications

(4 citation statements)

References 19 publications

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“…Based on the fundamental research, further studies are carried out to explore the potential applications as well as the improved forms of ISRJ. The jamming effect of ISRJ on some typical wideband radar systems like de-chirping radar [3], PC radar [4], and range doppler (RD) radar [5], [6] are analyzed quantitatively in subsequent studies. Furthermore, the use of ISRJ is extended to scatter wave in [7] and the corresponding jamming effect is verified.…”

Section: Introductionmentioning

confidence: 99%

A time-frequency filtering method against interrupted sampling repeater jamming based on histogram energy analysis

Wang¹,

Wang

Li³

et al. 2023

International Conference on Geographic Information and Remote Sensing Technology (GIRST 2022)

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Interrupted sampling repeater jamming (ISRJ) is a new type of coherent jamming for wideband radar systems. By copying and repeatedly forwarding the radar transmitting signal slice by slice, ISRJ can generate a series of false targets in the range direction, which significantly impairs radar's ability to detect and track targets of interest. Therefore, an advanced time-frequency (TF) filtering method for ISRJ suppression is proposed in this paper. Firstly, the radar received echo signal is transformed into TF domain through short-time Fourier transform (STFT). Secondly, based on the discontinuity and high intensity of ISRJ, the ISRJ contaminated regions can be mapped precisely in the TF image by means of histogram energy analysis and subsequent TF energy accumulation. Finally, these regions are removed by a constructed adaptive filter and the jamming-free pulse compression (PC) results can be obtained. Simulation results reveal that, compared with other competing filtering methods, the proposed method can effectively suppress ISRJ and show better robustness under different circumstances.Keywords-interrupted sampling repeater jamming (ISRJ); short-time Fourier transform (STFT); histogram energy analysis; time-frequency (TF) filtering

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Section: Introductionmentioning

confidence: 99%

A time-frequency filtering method against interrupted sampling repeater jamming based on histogram energy analysis

Wang¹,

Wang

Li³

et al. 2023

International Conference on Geographic Information and Remote Sensing Technology (GIRST 2022)

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show abstract

“…e intrapulse jamming characteristic of ISRJ solves the application limitation of the first working mode and also invalidates the abovementioned jamming countermeasures. On this basis, scholars have further explored the application prospect and derivative forms of ISRJ [14][15][16][17][18][19][20][21][22]. In terms of specific application, the jamming theory and effect of ISRJ have been tested on various LFM wideband radars, such as PC radar [14], dechirping radar [15], and range doppler (RD) imaging radar [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…On this basis, scholars have further explored the application prospect and derivative forms of ISRJ [14][15][16][17][18][19][20][21][22]. In terms of specific application, the jamming theory and effect of ISRJ have been tested on various LFM wideband radars, such as PC radar [14], dechirping radar [15], and range doppler (RD) imaging radar [16][17][18]. In addition, Li et al [19] quantify the influence of signal interception ratio on jamming power loss and evaluate the corresponding jamming effect.…”

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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“…Inspired by the Intermittent Sampling Repeater Jamming (ISRJ), the generation of ISAR decoys is addressed, associated with the DIS and the ISRJ, in ref. [19]. For non‐negligible error of a Stop And Go (SAG) model to high‐speed moving targets, the necessity of using the Inner Pulse Motion (IPM) model was demonstrated in Ref.…”

Section: Introductionmentioning

confidence: 99%

A real‐time fine echo generation method of extended false target with radially high‐speed moving

Wei

Zhang

Chen

2022

IET Radar Sonar & Navi

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The false‐target echo generation to Inverse Synthetic Aperture Radar (ISAR) is significant in jamming the enemy ISAR and promoting ISAR development. Generally, it requires false‐target echo coherent with the radar, real time and fine. However, conventional methods, such as digital image synthesizer (DIS), cannot meet those requirements. Moreover, existing methods do not consider the target's radial moving. To meet those demands, we propose an improved method in this study. We equivalently model echo formation as the synthesizer of two independent parts: (1) echo of remote target with radial moving and (2) echo of nearby extended target. In part one, accuracy is improved by utilising the Inner Pulse Motion (IPM) model and complexity is simplified by deducing it as a frequency offset modulation. In part two, the fine extended target echo is constructed by using convolution filtering whose resources consumption can be greatly reduced by separating it into an offline stage and a real‐time stage. Our method is verified by algorithm simulations and actual experiments. The results indicate that it can build the fine false‐target echo in real‐time and can adapt to the target's radial velocity, different resolution and size. Compared with the conventional DIS method, our method reduces the computational complexity significantly and has more comprehensive functions.

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Simulation of two-dimensional ISAR decoys on a moving platform

Cited by 6 publications

References 19 publications

A time-frequency filtering method against interrupted sampling repeater jamming based on histogram energy analysis

A time-frequency filtering method against interrupted sampling repeater jamming based on histogram energy analysis

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

A real‐time fine echo generation method of extended false target with radially high‐speed moving

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