Systems Engineering and Electronics ›› 2025, Vol. 47 ›› Issue (4): 1115-1126.doi: 10.12305/j.issn.1001-506X.2025.04.08

• Sensors and Signal Processing • Previous Articles     Next Articles

An intra-pulse adaptive sag LFM waveform design method for anti-interrupted sampling repeater jamming

Zhaopeng SHI1,2, Hao WU2,*, Wantian WANG2, Xuan ZHU3, Jiahao ZHANG2, Jin MENG2, Qiang LI1   

  1. 1. School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan 430074, China
    2. National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan 430033, China
    3. School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
  • Received:2024-01-30 Online:2025-04-25 Published:2025-05-28
  • Contact: Hao WU

Abstract:

Interrupted sampling repeater jamming (ISRJ) is a type of active coherent jamming technology based on the principle of down-sampling. The traditional anti-ISRJ waveform optimization method has defects such as high solution complexity and damage to traditional waveform performance. Based on this, an intra-pulse adaptive sag waveform anti-ISRJ design method is proposed. Firstly, the time domain envelope of the original linear frequency modulation (LFM) waveform is designed by using the discontinuous sampling characteristics of the interference time domain. Secondly, the intra-pulse adaptive time shift optimization is performed on the designed sag position. Finally, the waveform with anti-ISRJ effect is obtained. The proposed method does not require complex iterative optimization and can effectively use the difference of echo pulse compression peaks to suppress ISRJ without losing the traditional LFM performance. The simulation results show that the designed waveform interference suppression performance is significantly improved compared with the traditional method.

Key words: electronic countermeasures, interrupted sampling repeater jamming(ISRJ), waveform design, interference suppression

CLC Number: 

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