Infrared and Laser Engineering, Volume. 54, Issue 2, 20240422(2025)
Noise reduction method for phase-sensitive optical time domain reflector system based on empirical mode decomposition of complementary ensemble
Fig. 4. Flow chart of the calculated multiscale permutation entropy
Fig. 6. Flowchart of the MVO-CEEMD algorithm for improved wavelet thresholds
Fig. 7. Simulated positioning experiment diagram, superimposed with white noise with a standard deviation of 0.2. (a) Vibration positioning curve; (b) Vibration positioning curve after noise removal
Fig. 9. (a) Acquisition electrical signal; (b) Amplitude curve; (c) Amplitude curve near the vibration position; (d) Vibration positioning curve
Fig. 10. Number of optimized iterations of the MVO algorithm. (a) Iterations 0-500 algorithm optimization diagram; (b) 0-50 iterations local magnification diagram
Fig. 12. Location curve of the 600 Hz vibration signal after denoising
Fig. 13. Denoising result of positioning when the vibration frequency is 10 Hz. (a) EMD-PCC; (b)VMD-NWT; (c) CEEMDAN; (d) Proposed algorithm
Fig. 14. Denoising result of positioning when the vibration frequency is 200 Hz. (a) EMD-PCC; (b)VMD-NWT; (c) CEEMDAN; (d) Proposed algorithm
Fig. 15. Denoising result of positioning when the vibration frequency is 1.2 kHz. (a) EMD-PCC; (b) VMD-NWT; (c) CEEMDAN; (d) Proposed algorithm
Fig. 16. Location map of the denoised vibration signal with a vibration frequency of 200 Hz. (a) EMD-PCC; (b) VMD-NWT; (c) CEEMDAN; (d) Proposed algorithm
Fig. 17. Phase frequency domain of vibration signal after denoising with vibration frequency of 200 Hz. (a) EMD-PCC; (b) VMD-NWT; (c) CEEMDAN; (d) Proposed algorithm
Fig. 18. Phase time domain of vibration signal after denoising with vibration frequency of 200 Hz. (a) EMD-PCC; (b) VMD-NWT; (c) CEEMDAN; (d) Proposed algorithm
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Xinbo YUE, Xu GAO, Yang GAO, Haitao WANG, Xiue LU. Noise reduction method for phase-sensitive optical time domain reflector system based on empirical mode decomposition of complementary ensemble[J]. Infrared and Laser Engineering, 2025, 54(2): 20240422
Category: 光通信与光传感
Received: Nov. 19, 2024
Accepted: --
Published Online: Mar. 14, 2025
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