利用小波包技术对电磁干扰信号进行特性提取的研究

本文提出了一种利用小波包对电力电子装置的EMI信号进行特性提取的方法。该方法针对含有不同电磁干扰的信号进行小波包分析，并用分析结果获取基于能量的干扰特性。最后利用EMI信号的奇异性对该种方法提出了改进措施，并进行了品质评价。

The Study of EMI Signals'' Feature Extraction Based on Wavelet Packet

This paper proposes a wavelet packet based technique to extract feature of EMI signals in power electronic devices. The method can be applied to analyzing the signals with different EMI and getting the interferential feature based on its energy from the analysis result. By using the EMI signals' singularity property, an improved measure is put forward and their qualities are appraised at last.