脉间-脉内捷变频雷达抗间歇采样干扰方法

刘智星; 杜思予; 吴耀君; 沙明辉; 邢孟道; 全英汇

doi:10.12000/JR22001

脉间-脉内捷变频雷达抗间歇采样干扰方法

DOI: 10.12000/JR22001

1.
西安电子科技大学电子工程学院西安 710071
2.
北京无线电测量研究所北京 100854
3.
西安电子科技大学前沿交叉研究院西安 710071

基金项目: 国家自然科学基金(61772397)，陕西省杰出青年科学基金(2021JC-23)，陕西省科技创新团队(2019TD-002)

详细信息

作者简介:
刘智星(1993–)，男，博士研究生，主要研究方向为捷变相参雷达信号处理及其抗干扰

杜思予(1998–)，女，硕士研究生，主要研究方向为雷达波形优化及抗干扰

吴耀君(1993–)，男，博士研究生，副研究员，主要研究方向为捷变雷达抗干扰、雷达目标特性识别、新体制雷达

沙明辉(1986–)，男，研究员，硕士，主要研究方向为雷达系统设计和雷达电子对抗

邢孟道(1974–)，男，教授，博士，2002年在西安电子科技大学获得博士学位，现担任中国电子学会会士，《雷达学报》《电子与信息学报》等期刊编委，IEEE TGRS副主编，IEEE GRSM客座编辑。主要研究方向为SAR/ISAR成像和动目标检测等

全英汇(1981–)，男，博士，教授，2012年在西安电子科技大学获得博士学位，国家级领军人才、陕西省杰青、西安市青年科技人才。主要研究方向为电磁博弈对抗、敏捷雷达、雷达遥感等

通讯作者:
全英汇 yhquan@mail.xidian.edu.cn

责任主编：胡卫东 Corresponding Editor: HU Weidong
中图分类号: TN972
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- 被引次数: 11
出版历程
- 收稿日期: 2022-01-05
- 修回日期: 2022-03-17
- 网络出版日期: 2022-03-31
- 刊出日期: 2022-04-28

Anti-interrupted Sampling Repeater Jamming Method for Interpulse and Intrapulse Frequency-agile Radar

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

摘要

摘要: 为提升雷达抗间歇采样干扰的能力，该文根据间歇采样转发干扰收发分时的特点，利用脉间-脉内捷变频波形的“主动”抗干扰优势，提出了一种基于分数阶傅里叶变换的并行干扰抑制方法。首先在时域对被干扰的子脉冲进行提取，并将提取到的信号进行切片处理，然后在分数阶傅里叶域利用窄带滤波器组对干扰进行抑制，最后构造匹配滤波器组进行分段脉冲压缩实现子脉冲积累。理论分析和仿真结果表明，所提方法可以有效对抗不同间歇采样干扰样式组成的多主瓣干扰，在高干信比条件下依然具有良好的抗干扰性能，极大提升了雷达的抗干扰能力。
- 电子对抗 /
- 频率捷变 /
- 间歇采样转发干扰 /
- 分数阶傅里叶变换 /
- 分段脉冲压缩
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.
- Electronic Counter-Measures (ECM) /
- Frequency agility /
- Interrupted-Sampling Repeater Jamming (ISRJ) /
- Fractional Fourier Transform (FrFT) /
- Segmented pulse compression

HTML全文

图 1 间歇采样转发干扰示意图

Figure 1. Schematic diagram of ISRJ

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图 2 脉间-脉内捷变频波形时频图

Figure 2. Time-frequency diagram of inter-and-intra-pulse frequency agile waveform

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图 3 LFM回波信号时频图

Figure 3. Time-frequency diagram of LFM echo signal

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图 4 脉内捷变频回波信号时频图

Figure 4. Time-frequency diagram of intra-pulse frequency agile echo signal

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图 5 LFM信号分数阶傅里叶域频谱特征

Figure 5. Spectral characteristics in fractional Fourier domain of LFM signal

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图 6 分数阶傅里叶域并行干扰抑制流程图

Figure 6. Flow chart of parallel interference suppression in fractional Fourier domain

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图 7 间歇采样直接转发干扰抑制结果

Figure 7. ISRJ-DF suppression results

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图 8 间歇采样重复转发式干扰抑制结果

Figure 8. ISRJ-RF suppression results

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图 9 仿真实验2结果

Figure 9. Simulation 2 results

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图 10 干扰机非同步采样仿真结果

Figure 10. Simulation results of asynchronous sampling by jammer

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图 11 不同子脉冲数分段脉压结果

Figure 11. Pulse compression results of different sub-pulse numbers

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图 12 主副瓣比随信干比变化关系曲线

Figure 12. The curve of main-lobe to sidelobe ratio with SIR

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表 1 雷达波形参数设置

Table 1. Radar waveform parameter setting

参数	数值	参数	数值
脉冲数 $N$	64	子脉冲数 $M$	4
跳频数 $N$	64	脉内跳频间隔 $\Delta {f_{\text{s}}}$	5 MHz
脉间跳频间隔 $\Delta f$	9 MHz	子脉冲带宽 ${B_{\text{s}}}$	5 MHz
脉冲重复周期 ${T_{\text{r}}}$	40 μs	子脉冲脉宽 ${T_{\text{s}}}$	1 μs
中心载频 ${f_0}$	14 GHz	采样率 ${f_{\text{s}}}$	80 MHz

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