先验引导的轻量化噪声鲁棒雷达复合干扰多标签识别网络

赵云飞; 刘梅; 高勋章; 刘烁炜

doi:10.12000/JR25272

先验引导的轻量化噪声鲁棒雷达复合干扰多标签识别网络

DOI: 10.12000/JR25272 CSTR: 32380.14.JR25272

国防科技大学电子科学学院长沙 410073

基金项目: 国家自然科学基金 (61921001)，湖南省研究生创新项目 (CX20250020)

详细信息

作者简介:
赵云飞，硕士生，主要研究方向为雷达信号处理

刘　梅，博士生，主要研究方向为智能感知与目标识别

高勋章，研究员，主要研究方向为雷达目标特性与雷达目标识别

刘烁炜，副研究员，主要研究方向为雷达目标识别

通讯作者:
高勋章 gaoxunzhang@nudt.edu.cn

责任主编：李亚超 Corresponding Editor: LI Yachao

中图分类号: TN958
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出版历程
- 收稿日期: 2025-12-17

Prior-guided Lightweight Noise-robust Multi-label Radar Composite Interference Recognition Network

College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China

Funds: The National Natural Science Foundation of China (61921001), The Hunan Provincial Graduate Student Research Innovation Program (CX20250020)

More Information

Corresponding author: GAO Xunzhang ,gaoxunzhang@nudt.edu.cn

摘要

摘要: 干扰辨识是提升雷达目标识别系统抗干扰能力的关键环节。相较于单一干扰，复合干扰由于结构复杂、组合形式灵活，其辨识难度显著增加。然而，现有辨识方法大多为数据驱动模型，未引入干扰的先验信息，导致模型在复杂场景下存在性能瓶颈，且可解释性不足；同时，大多方法缺乏噪声抑制机制，在复杂环境下易出现噪声过拟合问题。为此，该文基于不同干扰在时域上的对称性数学先验，提出了一种干扰先验引导的噪声鲁棒雷达复合干扰多标签识别网络。首先，通过由粗到细去噪的策略对复合干扰进行噪声抑制，并优化干扰的先验结构，缓解辨识过程中由噪声引起的过拟合问题；其次，计算自相关对称性得分量化干扰先验强度，并通过对称编码器，将先验强度映射为门控机制，引导干扰特征融合并时序建模；最后，将噪声强度与时序特征联合嵌入到识别网络中，进一步增强模型在不同信噪比条件下的鲁棒性。实验表明，在低信噪比条件下，所提方法对15种间歇采样转发复合干扰和30种复杂复合干扰的平均识别准确率均超过90%，在性能优于最优对比模型的同时，显著降低了模型参数量。
- 雷达复合干扰 /
- 多标签分类 /
- 特征融合 /
- 干扰识别 /
- 小波分解 /
- 噪声抑制
Abstract: Interference identification is a critical component in enhancing the anti-jamming capability of radar target recognition systems. Compared with single-type interference, composite interference poses substantially greater identification challenges due to its structural complexity and flexible combination patterns. However, most existing identification methods are purely data-driven and fail to incorporate interference prior knowledge, resulting in performance bottlenecks in complex scenarios and limited interpretability. Moreover, many approaches lack effective noise suppression mechanisms and are prone to noise overfitting under low signal-to-noise ratio (SNR) conditions. To address these limitations, this study proposes a prior-guided, noise-robust multi-label recognition network for radar composite interference, which exploits time-domain symmetry priors in different interference types. First, a coarse-to-fine denoising strategy is employed to suppress noise while preserving and enhancing their prior structural characteristics, thereby alleviating noise-induced overfitting during the recognition process. Second, an autocorrelation-based symmetry score is introduced to quantify the strength of the interference prior. The score is then mapped into a gating mechanism via a symmetry encoder to guide interference feature fusion and temporal representation learning. Finally, noise intensity and temporal features are jointly embedded into the recognition network, further enhancing the robustness of the proposed method across varying SNR conditions. Experimental results demonstrate that, under low-SNR conditions, the proposed method achieves average recognition accuracies exceeding 90% for 15 types of intermittent sampling repeater composite interference and 30 types of complex composite interference. Moreover, the proposed approach outperforms the strongest baseline model while significantly reducing model parameters.
- Radar composite jamming /
- Multi-label classification /
- Feature fusion /
- Jamming signal recognition /
- Wavelet decomposition /
- Noise Suppression

HTML全文

图 1 8种干扰模型脉压结果图

Figure 1. Eight types of interference model pulse compression results

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图 2 小波细节系数特征图

Figure 2. Wavelet detail coefficient feature map

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图 3 本文网络结构示意图

Figure 3. Schematic of the proposed network

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图 4 噪声抑制与特征优化模块结构图

Figure 4. Architecture of the noise suppression and feature optimization module

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图 5 数据集分布情况

Figure 5. Dataset distribution

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图 6 各模型噪声鲁棒性能图

Figure 6. Evaluation of noise robustness for different models

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图 7 本文与对比网络混淆矩阵结果图

Figure 7. Confusion matrices of our method and comparative networks

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图 8 复杂干扰数据集识别准确率雷达图

Figure 8. Complex interference dataset classification accuracy radar chart

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图 9 噪声抑制与特征优化效果图

Figure 9. Visualization of noise suppression and feature optimization effects

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表 1 噪声感知分类器结构

Table 1. Noise-aware classifier architecture

层	操作	输出形状
输入	F_dec	(B,24+2)
1	线性层 26→64,ReLU	(B,64)
2	Dropout (p=0.3)	(B,64)
3	线性层 64→32, ReLU	(B,32)
4	线性层 32→分类数	(B，分类数)

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表 2 3个数据集的参数配置

Table 2. Parameter configurations for three datasets

数据集	参数	取值范围
1	总样本数	30000
	雷达带宽	10 MHZ
	雷达脉宽	20 μs
	雷达波长	0.1911 m
	干扰幅度	0.8～1.2
	SNR	–8～20 dB
	采样占空比	0.16～0.875
	速度	300～1200 m/s
	距离	1500～4900 m
	转发次数	2～6 次
	噪声长度(SNISRJ-1)	0.5～1.5 μs
	噪声长度(SNISRJ-2)	10～30 μs
2	总样本数	40000
	SNR	0～20 dB
	速度	100～600 m/s
	距离	1500～5000 m
	干扰幅度	0.8～1.2
	采样占空比(ISRJ)	0.3～0.5
	谱线数(COMB)	5～15
	频率步长(COMB)	0.5～2.0 MHZ
	切片数(SMSP)	2～4
	频率步长(SMSP)	1～3 MHZ
	采样宽度(C&I)	0.5～1.5 μs
	采样周期(C&I)	1～6 μs
3	采样占空比(ISRJ)	0.1～0.5
	谱线数(COMB)	5～20
	切片数(SMSP)	2～8
	采样宽度(C&I)	0.8～1.8 μs
	采样周期(C&I)	1.6～7.2 μs

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表 3 各类间歇采样转发干扰在不同网络模型下的识别性能对比

Table 3. Recognition performance comparison of various ISRJ types across different network models

评估类别	干扰类型	模型
评估类别	干扰类型	YOLOv11	FRFTNet	MLACM	MLCNN	SNV2-EHA	CMNet	Proposed
单类干扰识别率(%)	1	90.55	99.50	98.59	99.85	99.90	98.39	99.90
	2	64.95	94.57	95.54	98.15	99.51	98.48	98.21
	3	75.54	91.24	90.62	99.49	96.78	95.54	99.38
	4	84.43	95.14	96.43	95.33	97.62	96.95	98.38
复合干扰识别率(%)	1+2	37.08	82.83	90.33	94.17	96.58	92.50	96.00
	2+4	19.61	49.22	68.83	63.88	78.64	82.04	78.93
	2+3	40.00	68.81	49.25	66.87	81.64	81.27	84.18
	2+3+4	20.15	41.24	34.95	57.68	70.93	71.29	78.66
	1+4	25.26	63.42	56.49	69.39	87.63	80.00	90.96
	1+3	42.41	76.98	63.97	87.16	89.74	90.43	89.22
	1+3+4	12.72	19.47	10.44	52.18	54.95	67.91	69.51
	3+4	34.22	65.62	27.50	68.36	76.56	72.03	83.20
	1+2+4	2.99	30.10	53.97	64.61	74.22	74.07	81.18
	1+2+3	34.26	47.35	78.70	85.37	80.62	84.20	87.78
	1+2+3+4	89.67	89.20	92.30	91.32	93.28	92.83	97.13
总体效果(%)	平均精确率	48.30	65.42	72.38	78.32	81.07	81.37	85.52
	平均召回率	42.12	63.42	63.00	74.61	79.91	79.87	83.29
	平均F1分数	42.78	63.38	63.55	75.98	80.27	80.47	84.24
	子集准确率	54.98	71.58	72.41	82.17	86.60	86.78	90.54
模型复杂度	浮点运算次(10⁶)	0.183	0.166	0.652	0.005	0.037	4.596	0.160
	参数量(10⁹)	1.20	0.66	33.78	0.04	0.65	92.66	0.16
	测试时间(s)	0.78	1.14	0.90	0.61	0.64	3.81	0.74
注：文中使用黑体标出了最优指标；干扰1-4分别对应ISDJ, ISPJ, SNISRJ-1, SNISRJ-2；为方便布局，表格对模型名称进行了简化。

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表 4 不同模型在数据集2与数据集3上的性能对比

Table 4. Performance comparison on dataset 2 and dataset 3

序号	模型	数据集2准确率 (%)	数据集3(失配)准确率 (%)
1	Proposed	90.66	77.14
2	CrossModality	89.60	76.12
3	ShuffleNetV2-EHA	86.40	75.29
4	MLACM	81.79	70.06
5	MLCNN	78.21	65.68
6	FRFTNet	39.12	37.50
7	YOLOv11	27.36	25.63
注：文中使用黑体标出了最优指标。

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表 5 模块消融结果

Table 5. Ablation results of modules

实验	噪声抑制	噪声感知	先验引导	小波分支	准确率 (%)
1	√	√	√	√	90.62
2		√	√	√	87.21
3	√		√	√	86.71
4	√	√		√	85.68
5	√	√	√		86.44
6		√		√	85.37
7			√	√	86.68
8		√		√	85.87
9				√	84.43
注：文中使用黑体标出了最优指标。

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