| 基于EEMD方法的混合信号分离识别 |
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| 引用本文： | 许舵,沈国勤,钱祖平.基于EEMD方法的混合信号分离识别[J].军事通信技术,2011(2). |
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| 作者姓名： | 许舵 沈国勤 钱祖平 |
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| 作者单位： | 解放军理工大学通信工程学院研究生4队;中国人民解放军61226部队;解放军理工大学通信工程学院卫星通信系; |
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| 摘 要： | 针对宽开通信侦察系统中的多信号分离问题,提出了一种总体平均经验模式分解(EEMD)方法。首先对混合信号进行去噪,进行功率谱估计,然后利用EEMD方法对混合信号进行分解得到一簇本征模态函数IMF(Intrinsic Mode Function),对代表单个信号的IMF进行Hlibert变换,得到与各阶IMF相对应的瞬时频率,确定信号的个数,估计出其载波频率,设计出相应的带通滤波器,分离出单个信号。最后设计决策树对分离出的单个信号进行调制识别,确定信号的种类。文中以三个信号组合ASK、BPSK、2FSK为例,通过仿真验证了方法的有效性。
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| 关 键 词： | 总体平均经验模式分解 时频分析 本征模态函数 希尔伯特变换 |
Research on Separation for Mixed Signals Based on Ensemble Empirical Mode Decomposition |
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| XU Duo,SHEN Guo-qin,QIAN Zu-ping.Research on Separation for Mixed Signals Based on Ensemble Empirical Mode Decomposition[J].Journal of Military Communications Technology,2011(2). |
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| Authors: | XU Duo SHEN Guo-qin QIAN Zu-ping |
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| Institution: | XU Duo1,SHEN Guo-qin3,QIAN Zu-ping2(1.Postgraduate Team 4 ICE,PLAUST,Nanjing 210007,China,2.Unit 61226 of PLA,Beijing 100079,3.Department of Satellite Communication ICE,PLAUST) |
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| Abstract: | For the separation of mixed signals in the communication reconnaissance system of wide IF band,a new method of separation based on Ensemble Empirical Mode Decomposition(EEMD) is presented.First the power spectrum of mixed signal is acquired.Then the instant frequency of each IMF is computed by the EEMD method,and the numbers and types of signals contained in mixed signal are obtained.Last the band pass filters are designed to separate each signal and a decision-tree classifier is proposed to recognize the m... |
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| Keywords: | EEMD time-frequency analysis IMF Hilbert transform |
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