基于时频分析的混沌谐波线性混合信号提取算法

Extraction method of harmonic signal from chaotic background based on time-frequency

混沌信号与谐波信号的分离问题是混沌信号处理中的重点问题,时频分析理论的日趋成熟为该问题带来了新的解决方案。针对不同噪声情况下混沌背景下谐波信号的提取进行分析,将小波变换与EMD方法进行比较,经仿真实验总结出一种新的谐波信号提取的融合算法,仿真实验验证了该算法的有效性。

The separation of chaos and signal is an important problem of chaos signal processing.In recent years,the time-frequency analysis method is developed to resolute the problem.The basic theory of time-frequency methods was introduced.Comparing 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,a new synthesis about wavelet threshold and empirical mode decomposition（EMD） complementary of new harmonic signal extraction was summarized by experimental simulation.Computer simulation verified that the methods are high availability.