基于匹配滤波特征的抗间歇采样转发干扰方法

张顺生; 黄盼; 王文钦

doi:10.12000/JR25015

基于匹配滤波特征的抗间歇采样转发干扰方法

DOI: 10.12000/JR25015 CSTR: 32380.14.JR25015

1.
电子科技大学电子科学技术研究院四川成都 611731
2.
电子科技大学信息与通信工程学院四川成都 611731

基金项目: 国家部委基金

详细信息

作者简介:
张顺生，博士，研究员，主要研究方向为新体制雷达探测与成像、人工智能技术在雷达、电子战中的应用等

黄　盼，硕士生，主要研究方向为分布式相参雷达抗干扰

王文钦，博士，教授，主要研究方向为新体制雷达、雷达信号处理和电子对抗技术

通讯作者:
张顺生 zhangss@uestc.edu.cn

责任主编：胡卫东 Corresponding Editor: HU Weidong
中图分类号: TN972
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出版历程
- 收稿日期: 2025-01-16
- 修回日期: 2025-04-29

Suppression of Interrupted-sampling Repeater Jamming Based on Matched Filtering Features

1.
Research Institute of Electronic Science and Technology, University of Electronic Science and Technology of China, Chengdu 611731, China
2.
School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

Funds: The National Ministries Foundation

More Information

Corresponding author: ZHANG Shunsheng, zhangss@uestc.edu.cn

摘要

摘要: 分布式相参雷达实现全相参的关键在于对感兴趣目标进行发射相参合成。当相参参数估计阶段存在间歇采样转发干扰时，实现发射相参是极为困难的。为解决上述问题，该文提出了一种基于间歇采样转发干扰匹配滤波特征的干扰抑制方法。该方法能够弥补低干噪比条件下无法进行时频域滤波的缺陷，同时为高干噪比条件下进行干扰重构和对消提供了一种更精确的干扰参数估计途径。仿真结果表明，所提方法对间歇采样转发干扰的抑制效果显著。在低干噪比条件下相比于其他方法准确检测目标的概率提升了40%以上，在高干噪比条件下相比于其他方法等效信干比改善了2.5 dB以上。
- 分布式相参雷达 /
- 间歇采样转发干扰 /
- 干扰抑制 /
- 匹配滤波特征 /
- 参数估计
Abstract: Transmit coherence synthesis of the target of interest is crucial for achieving full coherence in distributed coherent aperture radars. Interrupted-Sampling Repeater Jamming (ISRJ) in the coherent parameter estimation phase poses great difficulties in transmitting coherence completely. To solve this issue, an interference suppression method based on ISRJ matched filtering features is proposed. This method can overcome the limitations of time-frequency domain filtering under low jamming-to-noise ratio (JNR) conditions while providing a more accurate means of estimating interference parameters for interference reconstruction and cancellation under high JNR conditions. Simulation results showed that the proposed method achieved a significant suppression effect on ISRJ. At low JNRs, the probability of target detection increased by over 40% compared with other methods such as time-frequency domain filtering. At high JNRs, the equivalent signal-to-jamming ratio improved by more than 2.5 dB relative to other approaches.
- Distributed Coherent Aperture Radar (DCAR) /
- Interrupted-Sampling Repeater Jamming (ISRJ) /
- Interference suppression /
- Matched filtering features /
- Parameters estimation

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图 1 DCAR干扰场景示意图

Figure 1. DCAR Jamming scenario

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图 2 ISRJ基本原理

Figure 2. ISRJ basic principle

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图 3 低JNR条件下回波脉冲压缩的时频分布图

Figure 3. TFD of pulse compression with low JNR

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图 4 高JNR条件下匹配滤波示意图

Figure 4. Matching filtering with high JNR

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图 5 高JNR条件下BDWPE检测示意图

Figure 5. BDWPE detection with high JNR

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图 6 DCAR接收相参阶段抑制ISRJ流程图

Figure 6. ISRJ suppression flow during the receiving coherent of DCAR

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图 7 单元雷达A回波脉冲压缩结果图

Figure 7. Pulse compression results based on radar A echo

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图 8 单元雷达A回波脉冲压缩的时频分布

Figure 8. Time-frequency distribution of pulse compression based on radar A echo

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图 9 以参考信号A做脉冲压缩结果

Figure 9. PC results based on reference signal A

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图 10 不同SNR下TDP随输入JSR的变化

Figure 10. Comparison of methods in interference interference scenarios

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图 11 不同干扰场景下的方法对比

Figure 11. Comparison of methods in interference interference scenarios

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图 12 单元雷达A 中ISPRJ抑制前后脉压结果图

Figure 12. Pulse compression results before and after ISPRJ suppression in radar A

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图 13 单元雷达A回波ISRJ抑制前后脉压结果图

Figure 13. Pulse compression results before and after ISRJ suppression in radar A

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图 14 性能指标随不同干扰参数估计误差的变化曲线

Figure 14. The variation curves of performance index with estimation errors of different interference parameters

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图 15 干扰抑制前后PPRIF随脉压后JNR的变化

Figure 15. The changes of PPRIF with JNR after PC before and after jamming suppression

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图 16 ISRJ参数估计的RMSE随脉压后JNR的变化

Figure 16. The RMSE of the estimated parameter of ISRJ changes with JNR after PC

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图 17 ISRJ抑制前后$ \Delta \tau $的RMSE随脉压后JNR的变化情况

Figure 17. The changes of RMSE of $ \Delta \tau $ with JNR after PC before and after ISRJ suppression

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图 18 ISRJ抑制前后$ \Delta \varphi $的绝对误差随脉压后JNR的变化情况

Figure 18. The changes of absolute error of $ \Delta \varphi $ with JNR after PC before and after ISRJ suppression

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1 低JNR条件下干扰抑制流程

1. Jamming suppression flow with low JNR

步骤1　单元雷达接收目标回波和干扰信号；
步骤2　对回波进行匹配滤波处理，并估计转发次数$ \tilde M $；
步骤3　对步骤2结果取峰值点个数$\left[ {3\tilde M + 1,\;\;2{{\tilde M}^2} + \tilde M + 1} \right]$，　在距离维上计算一阶差分，确定干扰极值点的相对间距$ \Delta R $；
步骤4　根据$\tilde M$和$ \Delta R $计算$ {\tilde T_{\rm u}} $、$ {\tilde T_{\rm j}} $，并判定干扰类型；
步骤5　根据步骤3、步骤4结果搜索异常间距$\Delta \tilde R$是否存在；　若存在，则追溯其目标峰值位置；若不存在，则执行步骤6；
步骤6　退出该流程。

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表 1 基于ISRJ匹配滤波特征的参数估计

Table 1. Parameters estimation based on ISRJ matching filter features

估计参数	估计途径
转发次数$ \tilde M $	计算干扰群数量
采样周期${\tilde T_{\rm u}}$	计算极值点间隔$\Delta R$
采样有效时长${\tilde T_{\rm j}}$	计算$\tilde M$，${\tilde T_{\rm u}}$
干扰到达时间${\text{TOAJ}}$	计算干扰峰值点时延
注：${\text{TOAJ}}$: Time of Arrival of Jamming。

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表 2 雷达相关参数

Table 2. Radar parameters

参数	数值
脉冲宽度${T_{\rm p}}$	$20\;{\text{μs}}$
信号带宽B	50 MHz
采样率${f_s}$	100 MHz
中心载频${f_{\rm c}}$	10 GHz
目标径向距离R	10050 m

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表 3 干扰机相关参数

Table 3. Jammer parameters

参数	数值
干扰采样有效时长${T_{\rm j}}$	${\text{1}}\;{\text{μs}}$
干扰采样周期${T_{\rm u}}$	${\text{3}}\;{\text{μs}}$
干扰转发次数M	2
干扰转发时延${T_{\rm d}}$	${\text{1}}\;{\text{μs}}$
信噪比SNR	–17 dB
干信比JSR	12 dB
注：JSR: Jamming-to-Signal Ratio

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