一种核密度估计与多域特征相结合的组合ISRJ-SMSP干扰识别方法

doi:10.12305/j.issn.1001-506X.2026.06.06

Abstract

Abstract:

To address the problems of instability and strong dispersion of characteristics in the identification of interrupted sampling repeater jamming （ISRJ）, smeared spectrum （SMSP） jamming, and their combined forms, which make single-characteristic methods ineffective and neural network methods limited by insufficient training samples and timeliness issues, a likelihood function construction method is proposed based on kernel density estimation, which achieves accurate identification of single-class and combined jamming by combining the statistical distributions of multiple characteristics, overcoming the problem of unstable combined jamming characteristics. Digital simulation experiments show that under different signal to interference ratio csonditions, the accuracy of the proposed method is more than 10% higher than that of the decision tree method, and the required samples are much fewer than those of the neural network method, providing an effective approach for radar active jamming identification in complex electromagnetic environments.

Key words: interrupted sampling repeater jamming (ISRJ), smeared spectrum (SMSP) jamming, combined jamming, kernel density estimation

CLC Number:

TN 974

Siyu WANG, Zhiyong SONG, Zhanling WANG. Combined ISRJ-SMSP jamming identification based on kernel density estimation and multi-domain feature fusion[J]. Systems Engineering and Electronics, 2026, 48(6): 1838-1847.

Figures/Tables 17

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References 30

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干扰	简称
间歇采样直接转发干扰+SMSP干扰（R=4）	组合干扰1
间歇采样重复转发干扰+SMSP干扰（R=4）	组合干扰2
间歇采样循环转发干扰+SMSP干扰（R=4）	组合干扰3

特征	离散度
矩峰度	0.1790
矩偏度	0.0028
归一化瞬时幅度绝对值的标准偏差	0.0177
频域矩偏度	0.5036
脉压矩峰度	1.0000

方法	训练复杂度	估计复杂度
所提方法	$ O\left(m\cdot {n}^{2}\right) $	$ O\left(m\cdot k\right) $
决策树	$ O\left(m\cdot n\cdot \log_2 n\right) $	$ O\left(\log_2 n\right) $
CNN	$ O\left(T\cdot L\cdot {k}^{2}\cdot h\cdot w\right) $	$ O\left(L\cdot {k}^{2}\cdot h\cdot w\right) $

参数类别	参数值
发射信号	线性调频信号
脉冲宽度/μs	10
带宽/MHz	10
采样率/MHz	100
脉冲重复间隔/μs	100
信噪比/dB	5
SIR/dB	−10
直接转发干扰采样时间/μs	1
重复转发干扰采样时间/μs	0.5
重复转发干扰转发次数	3
循环转发干扰采样时间/μs	1
SMSP干扰子波形数	4

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Combined ISRJ-SMSP jamming identification based on kernel density estimation and multi-domain feature fusion

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