| 基于时-频分析的LFM信号检测研究 |
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| 引用本文： | 徐龙,张海黎,郑生华.基于时-频分析的LFM信号检测研究[J].航天电子对抗,2008,24(3):32-34,47. |
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| 作者姓名： | 徐龙 张海黎 郑生华 |
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| 作者单位： | 1. 中国电子科技集团第38研究所,安徽,合肥,230031
2. 驻南京地区军代室,江苏,南京,210007 |
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| 摘 要： | 线性调频(LFM)波形是现代雷达系统广泛采用的一种非平稳扩谱信号波形,具有良好的低截获概率特性,为此,现代电子侦察系统常采用时频分析技术检测和分析这类时变信号.介绍了短时傅里叶变换和WVD等线性和非线性时频分析方法,运用这些方法对LFM信号的检测进行了分析,揭示了LFM信号在二维时频平面上的分布特征,并运用Hough变换检测WVD时频平面上呈直线分布的LFM信号.计算机仿真结果证实了此方法的有效性.
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| 关 键 词： | 线性调频信号 电子侦察 时频分析 Hough变换 |
Detection of LFM signal based on time-frequency analysis |
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| Xu Long,Zhang Haili,Zheng Shenghua.Detection of LFM signal based on time-frequency analysis[J].Aerospace Electronic Warfare,2008,24(3):32-34,47. |
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| Authors: | Xu Long Zhang Haili Zheng Shenghua |
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| Institution: | Xu Long1,Zhang Haili2,Zheng Shenghua1(1.The 38th Research Institute of CETC,Hefei 230031,Anhui,China,2.MilitaryRepresentative Office of Nanjing,Nanjing 210007,Jiangsu,China) |
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| Abstract: | The linear frequency modulated(LFM) waveform is widely used in modern radars and communication systems.It is a non-stationary signal with spread bandwidth.To detect this low probability of intercept(LPI) and time-varying signal,it must perform the tasks of envelope detection and intra-pulse feature analysis for radar signal classification and identification.Time-frequency analysis is an effective tool for modern signal processing,and often applied to analyze and process non-stationary signals.The short time... |
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| Keywords: | LFM signal electronic reconnaissance time-frequency analysis Hough transform |
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