Table 1 Comparison of SNR results after denoising at different noise levels.

From: A denoising method for aeroengine gas path electrostatic signal of low signal-to-noise ratio based on IMFs optimized reconstruction and wavelet threshold

σ

SNRin of the noisy signal

SNRout of simulated signals denoised by the four methods

A

B

C

D

0.3

11.48

13.58

18.77

17.96

20.41

0.7

4.12

7.27

14.57

11.08

15.36

1.0

1.02

4.78

12.04

7.97

12.82

1.5

−2.50

2.32

9.04

4.38

9.65

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