The Research on LFM Radar Countering Frequency-Shift Jamming Methods

ZHANG Liang; WANG Guo-hong; ZHANG Xiang-yu; LI Si-wen; XIN Ting-ting

doi:10.12263/DZXB.20191334

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The Research on LFM Radar Countering Frequency-Shift Jamming Methods

更新时间：2025-12-08

- The Research on LFM Radar Countering Frequency-Shift Jamming Methods
- Acta Electronica Sinica Vol. 49, Issue 3, Pages: 510-517(2021)
- 作者机构：
  
  1. 海军航空大学信息融合研究所,山东,烟台,264001
  2. 94326部队,山东,济南,250000
  3. 海军航空大学信息融合研究所,山东,烟台,264001
  4. 94326部队,山东,济南,250000
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.61731023, No.61701519, No.61671462);A Grant for Special Project in Taishan Scholar “Climbing” Program
- DOI：10.12263/DZXB.20191334
  CLC： TN974
- Published Online：25 March 2021，
  
  Published：2021
- 稿件说明：
移动端阅览
ZHANG Liang, WANG Guo-hong, ZHANG Xiang-yu, et al. The Research on LFM Radar Countering Frequency-Shift Jamming Methods[J]. Acta Electronica Sinica, 2021, 49(3): 510-517.
DOI：

ZHANG Liang, WANG Guo-hong, ZHANG Xiang-yu, et al. The Research on LFM Radar Countering Frequency-Shift Jamming Methods[J]. Acta Electronica Sinica, 2021, 49(3): 510-517. DOI： 10.12263/DZXB.20191334.

摘要

针对现有移频干扰对抗方法，分析得出基于回波匹配输出中心频率鉴别干扰适用范围有限、调频斜率捷变LFM （Slope Varying LFM，SV-LFM）波形能够一定程度抑制干扰，但需设计合理捷变方式的结论.同时，以LFM脉冲多普勒雷达抗自卫式移频干扰为背景，提出联合相参积累和二维分数阶傅里叶变换（Two Dimensional Fractional Fourier Transform，2D-FRFT）干扰鉴别方法，根据回波信号在两种处理方式下的峰值差异，对比门限鉴别目标真伪.仿真结果表明分析结论正确，所提方法可行有效.

Abstract

By studying the existing methods for countering frequency-shift jamming

this paper comes to the conclusion that the applicability of jamming discrimination method based on echo matching output center-frequency is limited and slope varying LFM (SV-LFM)

a radar transmitting waveform

can suppress the jamming to some extent

if the agile way is designed reasonable. Meanwhile

a jamming discrimination method jointing coherent integration and two dimensional fractional Fourier transform (2D-FRFT) is proposed on the background of LFM pulse Doppler radar countering self-screening frequency-shift jamming. According to the peak value difference of echo signal under the two processing modes

true and false targets are identified by comparing with a setting threshold. Simulation results show that the conclusion is correct and the proposed method works effectively.

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