期刊名称:International Journal of Computer Science Issues
印刷版ISSN:1694-0784
电子版ISSN:1694-0814
出版年度:2012
卷号:9
期号:6
出版社:IJCSI Press
摘要:The separation of chaos and signal is an important problem of chaos signal processing. In recent years, the time-frequency analysis method is more and more mature. This paper first introduces the basic theory of time-frequency methods. We compare wavelet method with empirical mode decomposition (EMD) method, according to the different noise situation of the performance analysis of harmonic signal extraction in chaos background. Summarize a new synthesis about wavelet threshold and empirical mode decomposition (EMD) complementary of new harmonic signal extraction by experimental simulation. Computer simulation verified that the methods are high availability.