摘要
针对经验模态分解中存在的端点效应及模态混叠现象,提出一种新的改进方法。利用镜像延拓方法对信号两端数据进行延拓后,结合余弦窗函数以解决端点效应对分解结果的影响,再利用高频谐波法结合掩膜信号法抑制EMD分解过程中存在的模态混叠。通过实验对比验证了该方法的有效可行性。
Aiming at avoiding the existing problem of end effects and mode mixing in empirical mode decomposition, a new method is proposed. By using the method of mirror image extending to extend the signal data at both ends, then pro-cessing by cosine window function, the influence of end effects on decomposition results is solved. Using the method of high-frequency harmonics, it combines with the masking signal to inhibit the mode mixing of empirical mode decomposi-tion. Simulation results indicate that the new method is effective and feasible.
出处
《计算机工程与应用》
CSCD
2014年第14期194-201,共8页
Computer Engineering and Applications
关键词
经验模态分解
模态混叠
端点效应
empirical mode decomposition
mode mixing
end effects
