[1] [1] K Zhang, H Zhu. Weak signal detection technology[J]. Avionics Technology, 2009, 40(2): 30-36.

[2] [2] Sun Liying, Qu Dan, Yan Tian. Application of Fourier transform and wavelet transform to signal fault diagnosis[J]. Journal of Liaoning Institute of Technology, 2005, 25(3): 155-158.

[3] [3] Yin Xiaomin, Xu Tingting, Ding Junmin, et al.. procession of noise in infrared sensor made from PMN~PT[J]. Laser ＆Optoelectronics Progress, 2011, 48(1): 010401.

[4] [4] J Duan, X Xiong. Research on the application of wavelet transform in weak signal detection[J]. Mechanical Engineering & Automation, 2007, 5: 96-97.

[5] [5] Tang Jinyuan, Chen Weitao, Chen Siyu, et al.. Wavelet based vibration signal de-noising with a new adaptive thresholding function [J]. Journal of Vibration and Shock, 2009, 28(7): 118-121.

[6] [6] Mao Jiandong, Hua Dengxin, Wang Yufeng, et al.. Noise reduction in lidar signal based on wavelet packet analysis[J]. Chinese J Lasers, 2011, 38(2): 0209001.

[7] [7] Ma Jing, Tan Liying, Ran Qiwen. The elementary theory of optical wavelet filtering[J]. Chinese J Lasers, 1999, 26(4): 343-347.

[8] [8] N E Huang, Z Shen, S R Long, et al.. The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis[J]. P Roy Soc A-Math Phy, 1998, 454(1971): 903-995.

[9] [9] He Junfeng, Liu Wenqing, Zhang Yujun, et al.. A denoising method for backscatter signal of laser ceilometer based on Hilbert-Huang transform[J]. Acta Optica Sinica, 2011, 31(2): 0201001.

[10] [10] Zhou Zhenyu, Yang Hongyu, Gong Hui, et al.. Brain signal analysis of functional near-infrared imaging based on hilbert-huang transform[J]. Acta Optica Sinica, 2007, 27(2): 307-312.

[11] [11] J S Smith. The local mean decomposition and its application to EEG perception data[J]. J R Soc Interface, 2005, 2(5): 443-454.

[12] [12] P Maragos, J F Kaiser, T F Quatieri. On amplitude and frequency demodulation using energy operater[J]. IEEE T Signal Proces, 1993, 41(4): 1532-1550.

[13] [13] Ren Daqian, Yang Shixi, Wu Zhaotong, et al.. Instantaneous frequency extraction method and experiment based LMD[J]. Journal of ZhejiangUniversity, 2009, 43(3): 523-528.

[14] [14] Ju Pinghua, Qin Shunren, Zhao Ling. Energy operator demodulating approach based on LMD and its application extracting characteristics of a fault signal[J]. Journal of Mechanical Science and Technology, 2011, 30(2): 1-4.

[15] [15] A Potamianos, P Maragos. A comparison of the energy operator and the hilbert transform approach to signal and speech demodulation[J]. Signal Processing, 1994, 37(1): 95-120.

[16] [16] Ding Hong, Dai Yisong, Shi Yaowu. Short data signal spectrum estimation based on Wavelet transformation[J]. Acta Electronica Sinica, 1997, 25(1): 11-14.

[17] [17] Zhang Kang, Cheng Junsheng, Yang Yu, et al.. Apiece-wise based signal instantaneous frequency computing method[J]. Journal of Hunan University, 2011, 38(11): 54-59.