Volume 11 Issue 2
Apr.  2022
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Article Navigation >  Journal of Radars  > 2022  >  11(2): 301-312
LIU Zhixing, DU Siyu, WU Yaojun, et al. Anti-interrupted sampling repeater jamming method for interpulse and intrapulse frequency-agile radar[J]. Journal of Radars, 2022, 11(2): 301–312. doi: 10.12000/JR22001
Citation: LIU Zhixing, DU Siyu, WU Yaojun, et al. Anti-interrupted sampling repeater jamming method for interpulse and intrapulse frequency-agile radar[J]. Journal of Radars, 2022, 11(2): 301–312. doi: 10.12000/JR22001
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Anti-interrupted Sampling Repeater Jamming Method for Interpulse and Intrapulse Frequency-agile Radar

DOI: 10.12000/JR22001
  • 1.

    School of Electronic Engineering, Xidian University, Xi’an 710071, China

  • 2.

    Beijing Institute of Radio Measurement, Beijing 100854, China

  • 3.

    Academy of Advanced Interdisciplinary Research, Xidian University, Xi’an 710071, China

Funds:  The National Natural Science Foundation of China (61772397), The Shaanxi Provincial Science Fund for Distinguished Young Scholars (2021JC-23), The Science and Technology Innovation Team of Shaanxi Province (2019TD-002)
More Information
  • Corresponding author: QUAN Yinghui, yhquan@mail.xidian.edu.cn
  • Received Date: 2022-01-05
  • Accepted Date: 2022-03-17
  • Rev Recd Date: 2022-03-17
    • Available Online: 2022-03-23
  • Publish Date: 2022-03-31
    Abstract
  • To improve radar’s anti-Interrupted Sampling Repeater Jamming (ISRJ) capability, this study proposes a parallel interference suppression method based on the fractional Fourier transform, which uses the “active” anti-jamming capability of the interpulse and intrapulse frequency-agile waveform according to the characteristics of ISRJ transceiver splitting. First, the interfered sub-pulses are extracted in the time domain, and the extracted signals are sliced. Then, the narrowband filter banks are used to suppress the interference in the fractional Fourier domain. Finally, matching filter banks are constructed to achieve subpulse integration by applying segmented pulse compression. The theoretical analysis and simulation results show that the proposed method effectively suppresses multi-mainlobe interferences comprising different types of ISRJ and exhibits good anti-interference performance under a high jamming-to-signal ratio, which considerably improves the anti-jamming capability of the radar.

     

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