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Signal to noise ratio (SNR) before and after the de-noising process by using the Discrete Wavelet Analysis-Least Squares Method (DWA-LSM) and Discrete Wavelet Analysis-Gradient Descent (DWA-GD).
| SNR before De-Noising | 0.15 | 0.6 | 3 | ||
| SNR | After DWA-LSM |
2.9 | 5.3 | 11 | |
| After DWA-GD |
12.5 | 36 | 45 | ||
| The factors of SNR improvement | After DWA-LSM |
19.3 | 8.8 | 3.6 | |
| After DWA-GD |
83.3 | 60 | 15 | ||
