基于多维特征融合网络的分布式雷达真假目标辨识方法

    Distributed Radar True and False Target Identification Method Based on Multi-dimensional Feature Fusion Network

    • 摘要: 文中基于分布式雷达体制提出一种注意力引导的多维特征融合识别方法。该方法通过设计多特征融合网络对不同回波特征进行关注,将多模态信息投射到高维空间进行分离。网络综合利用目标回波能量一致性、速度投影一致性、空间定位相关性和真实反射形成的频谱形变特征,通过多尺度卷积关注信号在不同尺度上的特征,并在不同尺度和特征之间建立注意力机制以增强网络的适应能力。文中基于电磁仿真构建数据集,设计多种信噪比和基线长度条件对于辨识性能进行验证对比。实验表明,在-6 dB信噪比和2 km短基线条件下,文中所提方法识别率达97.4 %,较传统方法有明显提升。组件消融和特征消融实验证实了注意力机制、多尺度卷积及多特征融合等关键设计的有效性。文中所提方法基于物理特征实现,不依赖特定的信号模式,可为复杂电磁环境下的真假目标辨识提供更加稳健的解决方案,提高雷达辨识欺骗干扰的能力。

       

      Abstract: An attention-guided multi-dimensional feature fusion identification method based on a distributed radar system is proposed in this paper. In this method, a multi-feature fusion network is designed to focuse on different echo characteristics, and multi-modal information is projected into a high-dimensional space for effective separation. The network comprehensively utilizes the energy consistency of target echoes, velocity projection consistency, spatial positioning correlation, and spectral distortion features formed by genuine reflections, paying attention to features of signals at different scales by means of multi-scale convolution; moreover, it enhances the representational capacity of network by establishing an attention mechanism among different scales and features. The identification performance is validated and compared by constructing a dataset based on electromagnetic simulations, and designing various signal to noise ratio and baseline length conditions. Experimental results demonstrate that under challenging conditions of a signal to noise ratio of -6 dB and a short baseline of 2 km, the proposed method achieves a recognition rate of 97.4 %, showing significant improvement over traditional methods. Component-wise and feature-wise ablation studies confirm the effectiveness of key designs, including the attention mechanism, multi-scale convolution, and multi-feature fusion. As the proposed method is grounded in physical characteristics without relying on specific signal modes, it offers a more robust solution for true-false target identification in complex electromagnetic environments, thereby enhancing radar capability against deception jamming.

       

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