【摘 要】
:
现有基于人工提取特征的复杂体制雷达辐射源信号识别方法时效性低,识别准确率不佳.为此,提出了一种基于多学习单元卷积神经网络的识别方法.首先对辐射源信号的模糊函数进行高斯平滑,以校正噪声带来的毛刺与畸变;然后提取其正交切片作为进一步的特征提取对象;最后构建多学习单元卷积神经网络,学习和提取正交切片深层、泛在的特征,并通过softmax分类器进行分类识别.仿真实验结果表明,所提方法在信噪比为-2 dB时对6类典型雷达信号的整体平均识别率均保持在99.86%以上,即便是在-6 dB环境中,雷达信号的识别率也可达到
【机 构】
:
昆明理工大学 信息工程与自动化学院,昆明650500;昆明理工大学 计算中心, 昆明650500;昆明理工大学 信息工程与自动化学院,昆明650500
论文部分内容阅读
现有基于人工提取特征的复杂体制雷达辐射源信号识别方法时效性低,识别准确率不佳.为此,提出了一种基于多学习单元卷积神经网络的识别方法.首先对辐射源信号的模糊函数进行高斯平滑,以校正噪声带来的毛刺与畸变;然后提取其正交切片作为进一步的特征提取对象;最后构建多学习单元卷积神经网络,学习和提取正交切片深层、泛在的特征,并通过softmax分类器进行分类识别.仿真实验结果表明,所提方法在信噪比为-2 dB时对6类典型雷达信号的整体平均识别率均保持在99.86%以上,即便是在-6 dB环境中,雷达信号的识别率也可达到88.50%,在极低信噪比条件下具有良好的性能和可行性.
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