| 利用瞬时频率提取雷达辐射源特征的新算法 |
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| 引用本文： | 章建辉,黄高明,李敬辉.利用瞬时频率提取雷达辐射源特征的新算法[J].航天电子对抗,2008,24(5):36-39. |
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| 作者姓名： | 章建辉 黄高明 李敬辉 |
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| 作者单位： | 海军工程大学电子工程学院,湖北,武汉,430033 |
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| 摘 要： | 介绍了一种新的雷达辐射源特征提取算法,该算法首先通过伪维纳分布寻找一个随时间变化的最佳窗,基于该窗精确估计信号的瞬时频率,从瞬时频率估计中,可以识别出相位编码信号,然后对于不同的编码类型,利用所估计的瞬时频率,提取瞬时频率的自相关的主瓣峰值和最大旁瓣值的比值作为识别特征.仿真实验证明该算法提取的特征值可有效识别不同体制的雷达信号.
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| 关 键 词： | 辐射源 特征 瞬时频率 自相关 |
A new algorithm of radar emitters' feature extraction using instantaneous frequency |
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| Zhang Jianhui,Huang Gaoming,Li Jinghui.A new algorithm of radar emitters'' feature extraction using instantaneous frequency[J].Aerospace Electronic Warfare,2008,24(5):36-39. |
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| Authors: | Zhang Jianhui Huang Gaoming Li Jinghui |
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| Institution: | Zhang Jianhui,Huang Gaoming,Li Jinghui (Institute of Electronic Engineering,Naval University of Engineering,Wuhan 430033,Hubei,China) |
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| Abstract: | A new algorithm for extracting radar emitters'feature is introduced.This algorithm firstly estimates signal's instantaneou frequency using pseudo-Wigner distribution(PWD) with varying and data-driven window length,then calculates the feature based on the instantaneous frequency.The feature is described as the ratio of auto-correlation between maximal masterlobe and maximal sidelobe.Simulation shows the algorithm proposed can identify different radar emitters. |
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| Keywords: | radar emitter feature instantaneous frequency auto-correlation |
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