Chaotic signal noise reduction method

The invention discloses a chaotic signal noise reduction method, which comprises the following steps: firstly, decomposing an original signal into a plurality of IMFs by using a CEEMDAN, and identifying a noise IMF according to ETC of the IMFs; and then calculating the RCMDE of the remaining IMFs, and dividing the RCMDE into three groups of IMFs, namely a noise dominant IMF, a real signal dominantIMF and a real IMF. Finally, wavelet threshold noise reduction of the optimal decomposition level is carried out on the noise leading IMF and the real signal leading IMF respectively, the denoised signal and the real IMF are reconstructed, and then a final noise reduction signal is obtained. Simulation experiments are carried out on noise-containing chaotic signals, and compared with two noise reduction methods of EMD _ MSE _ WSTD and EEMD _ DE _ WSTD, it is found that the method has the obvious advantages of being high in signal-to-noise ratio and low in root-mean-square error. The chaotic signal noise reduction met