频谱管理中基于希尔伯特—黄变换的干扰诊断
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摘要
为了给频谱管理的干扰协调机制提供科学有效的依据,在分析系统间EMC干扰的特点基础上,采用希尔伯特-黄变换分析接收机端的干扰信号样本的时-频信息、希尔伯特谱和边际谱,得到干扰信号的时频特征。采用多级频率搬移的方法,解决信号的经验模态分解中出现的模态混叠。文章以互调干扰信号的诊断分析为例,验证此法能够将互调干扰从信号样本中分离。
In order to provides scientific and effective basis to the interference coordination of spectral management,we analyze the characteristics of the interference intra-system EMC,and adopted Hilbert-Huang Transform to get the Intrinsic Mode Functions,the Hilbert Spectrum and the marginal spectrum.In the paper,we used the method of frequency shifting to resolve Mode Mixing.On the basis of this information,we can obtain the characteristic of the signal in the time-frequency domain.We take an signal mixed intermodulation interference as example to test and verify our method is available.
In order to provides scientific and effective basis to the interference coordination of spectral management,we analyze the characteristics of the interference intra-system EMC,and adopted Hilbert-Huang Transform to get the Intrinsic Mode Functions,the Hilbert Spectrum and the marginal spectrum.In the paper,we used the method of frequency shifting to resolve Mode Mixing.On the basis of this information,we can obtain the characteristic of the signal in the time-frequency domain.We take an signal mixed intermodulation interference as example to test and verify our method is available.
引文
[1]翁木云,张其星等.频谱管理与监测[M].北京:电子工业出版社,2009.
[2]程军圣,于德介,杨宇.基于EMD的信号瞬时特征的小波分析方法[J].地震工程与工程振动,2004,(2).
[3]N.E.Huang,Z.Shen,S.R.Long,et al.The empirical mode decomposition and the Hilbert spectrum for non-linear and non-stationary time series analysis.Proc.Roy.Soc.,London.A.1998,454,903-995
[4]王婷.EMD算法研究及其在信号去噪中的应用[D].哈尔滨:哈尔滨工程大学,2010.
[2]程军圣,于德介,杨宇.基于EMD的信号瞬时特征的小波分析方法[J].地震工程与工程振动,2004,(2).
[3]N.E.Huang,Z.Shen,S.R.Long,et al.The empirical mode decomposition and the Hilbert spectrum for non-linear and non-stationary time series analysis.Proc.Roy.Soc.,London.A.1998,454,903-995
[4]王婷.EMD算法研究及其在信号去噪中的应用[D].哈尔滨:哈尔滨工程大学,2010.
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