Detection of harmonic signals from chaotic interference by empirical mode decomposition

• Published in: Chaos, solitons and fractals Vol. 30; no. 4; pp. 930 - 935
• Main Authors: Li, H.G., Meng, G.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.11.2006
• ISSN: 0960-0779; 1873-2887
• DOI: 10.1016/j.chaos.2005.08.174

An empirical mode decomposition (EMD) approach to the harmonic signal extraction from chaotic interference is proposed. Based on the EMD and the concept that any signal is composed of a series of simple intrinsic modes, the chaotic interference signal is decomposed to a series of intrinsic mode functions (IMFs), among which one IMF is the recovered harmonic signal. In this study, harmonic signals are contaminated with a chaotic interference signal which is generated by a Duffing oscillator, and the simulation results show that the harmonic signals can be effectively recovered from the contaminated signals by the EMD approach.