Optoelectronic Technology, Volume. 44, Issue 2, 152(2024)
Second Harmonic Denoising Based on Variational Mode Decomposition and SG Filtering
Figures & Tables(12)
Fig. 3. Trend plot between the adjustment factor
Fig. 5. Signal to noise ratio and root mean square error after denoising with modulation 1.5
Fig. 6. Signal to noise ratio and root mean square error after denoising with modulation 2.2
Fig. 7. Signal to noise ratio and root mean square error after denoising with modulation 3.0
Table 1. Optimal VMD decomposition under different noise levels
View tableView in ArticleTable 1. Optimal VMD decomposition under different noise levels
含噪信号SNR/dB IMF1相关系数 IMF2相关系数（×10-4） IMF3相关系数（×10-4） IMF4相关系数（×10-4） 最优
参数
-25.340 2
-23.401 9
-19.880 1
-18.792 9
-17.381 3
-15.443 1
-13.859 5
-12.520 6
-11.360 7
-10.337 7
-9.422 5
-8.594 7
-7.838 9
-6.500 1
-5.340 1
-4.317 1
-3.401 9
-2.574 1
-1.818 3
-1.123 1
0.860 3
0.877 7
0.911 1
0.920 9
0.932 8
0.947 4
0.957 6
0.965 1
0.970 5
0.974 8
0.978 2
0.980 9
0.983 1
0.986 4
0.988 8
0.990 6
0.992 1
0.993 1
0.993 9
0.994 6
0.135
0.183
0.310
0.360
0.434
0.557
0.680
0.799
0.923
1.04
1.16
1.27
1.39
1.62
1.84
2.06
2.28
2.49
2.70
2.91
0.052 0
0.067 8
0.091 1
0.104
0.123
0.154
0.156
0.183
0.210
0.236
0.261
0.287
0.312
0.362
0.410
0.458
0.506
0.552
0.598
0.644
0.022 9
0.030 0
0.047 8
0.054 6
0.064 7
0.080 7
0.096 1
0.111
0.126
0.140
0.155
0.168
0.182
0.209
0.235
0.261
0.286
0.311
0.338
0.363
720 000
500 000
270 000
230 000
190 000
150 000
125 000
110 000
92 000
82 000
74 000
67 000
61 000
52 000
46 000
41 000
37 000
34 000
31 000
29 000
Table 2. Optimal SG filtering under different signal‑ to‑noise ratios
View tableView in ArticleTable 2. Optimal SG filtering under different signal‑ to‑noise ratios
含噪信号SNR/dB 最优框长 P -25.340 2
-23.401 9
-19.880 1
-18.792 9
-17.381 3
-15.443 1
-13.859 5
-12.520 6
-11.360 7
-10.337 7
-9.422 5
-8.594 7
-7.838 9
-6.500 1
-5.340 1
-4.317 1
-3.401 9
-2.574 1
-1.818 3
-1.123 1
279
247
247
247
247
245
215
213
213
205
205
189
187
175
167
161
153
151
145
139
3.488 7×10-4
4.006 3×10-4
4.665 1×10-4
4.841 5×10-4
5.071 8×10-4
5.416 9×10-4
5.749 6×10-4
6.013 0×10-4
6.260 7×10-4
6.499 2×10-4
6.725 0×10-4
6.922 8×10-4
7.110 2×10-4
7.445 2×10-4
7.758 2×10-4
8.040 8×10-4
8.304 0×10-4
8.553 3×10-4
8.773 3×10-4
8.997 5×10-4
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Zhan WANG, Xinghua TU. Second Harmonic Denoising Based on Variational Mode Decomposition and SG Filtering[J]. Optoelectronic Technology, 2024, 44(2): 152
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Received: Oct. 7, 2023
Accepted: --
Published Online: Jul. 19, 2024
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