High-Stability PGC-EKF Demodulation Algorithm Integrated with a Phase Delay Compensation Module
To effectively eliminate the nonlinear distortion caused by the modulation depth (<i>C</i> value) drift and carrier phase delay (<i>θ</i>) in the phase-generated carrier (PGC) demodulation scheme, the PGC-PDC-EKF joint algorithm is presented, which combines phase delay compen...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
|
| Series: | Photonics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-6732/12/1/44 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832587624332656640 |
|---|---|
| author | Hengyang Zhao Feng Zhu Xiaoxiao Xu Zongling Zhao Chuanlu Deng |
| author_facet | Hengyang Zhao Feng Zhu Xiaoxiao Xu Zongling Zhao Chuanlu Deng |
| author_sort | Hengyang Zhao |
| collection | DOAJ |
| description | To effectively eliminate the nonlinear distortion caused by the modulation depth (<i>C</i> value) drift and carrier phase delay (<i>θ</i>) in the phase-generated carrier (PGC) demodulation scheme, the PGC-PDC-EKF joint algorithm is presented, which combines phase delay compensation (PDC) with an extended Kalman filter (EKF). The <i>θ</i> is accurately extracted and compensated by the PDC module. Furthermore, with the EKF algorithm, the harmonic distortion of the demodulated signal due to the fluctuation of <i>C</i> value is suppressed. The experimental results indicate that <i>θ</i> is compensated accurately with a resolution of 0.01745 rad. The signal-to-noise and distortion ratio (SINAD) of the improved scheme reaches 54.01 dB, which is 18.03 dB higher than the PGC-Arctan algorithm on average. The total harmonic distortion (THD) is as low as −62.28 dB, which is 26.04 dB lower than the PGC-Arctan algorithm. The linearity of the demodulation system exceeds 99.99%. The proposed method provides a significant reference for demodulation schemes of interferometric fiber optic sensing systems in practical applications. |
| format | Article |
| id | doaj-art-1104b937429d44f89fb192ab64099828 |
| institution | Kabale University |
| issn | 2304-6732 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-1104b937429d44f89fb192ab640998282025-01-24T13:46:18ZengMDPI AGPhotonics2304-67322025-01-011214410.3390/photonics12010044High-Stability PGC-EKF Demodulation Algorithm Integrated with a Phase Delay Compensation ModuleHengyang Zhao0Feng Zhu1Xiaoxiao Xu2Zongling Zhao3Chuanlu Deng4State Grid Anhui Electrical Power Research Institute, Hefei 230000, ChinaState Grid Anhui Electrical Power Research Institute, Hefei 230000, ChinaState Grid Anhui Electrical Power Research Institute, Hefei 230000, ChinaKey Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, ChinaKey Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, ChinaTo effectively eliminate the nonlinear distortion caused by the modulation depth (<i>C</i> value) drift and carrier phase delay (<i>θ</i>) in the phase-generated carrier (PGC) demodulation scheme, the PGC-PDC-EKF joint algorithm is presented, which combines phase delay compensation (PDC) with an extended Kalman filter (EKF). The <i>θ</i> is accurately extracted and compensated by the PDC module. Furthermore, with the EKF algorithm, the harmonic distortion of the demodulated signal due to the fluctuation of <i>C</i> value is suppressed. The experimental results indicate that <i>θ</i> is compensated accurately with a resolution of 0.01745 rad. The signal-to-noise and distortion ratio (SINAD) of the improved scheme reaches 54.01 dB, which is 18.03 dB higher than the PGC-Arctan algorithm on average. The total harmonic distortion (THD) is as low as −62.28 dB, which is 26.04 dB lower than the PGC-Arctan algorithm. The linearity of the demodulation system exceeds 99.99%. The proposed method provides a significant reference for demodulation schemes of interferometric fiber optic sensing systems in practical applications.https://www.mdpi.com/2304-6732/12/1/44interferometric fiber optic sensing systemphase-generated carrierphase delay compensationextended Kalman filter |
| spellingShingle | Hengyang Zhao Feng Zhu Xiaoxiao Xu Zongling Zhao Chuanlu Deng High-Stability PGC-EKF Demodulation Algorithm Integrated with a Phase Delay Compensation Module Photonics interferometric fiber optic sensing system phase-generated carrier phase delay compensation extended Kalman filter |
| title | High-Stability PGC-EKF Demodulation Algorithm Integrated with a Phase Delay Compensation Module |
| title_full | High-Stability PGC-EKF Demodulation Algorithm Integrated with a Phase Delay Compensation Module |
| title_fullStr | High-Stability PGC-EKF Demodulation Algorithm Integrated with a Phase Delay Compensation Module |
| title_full_unstemmed | High-Stability PGC-EKF Demodulation Algorithm Integrated with a Phase Delay Compensation Module |
| title_short | High-Stability PGC-EKF Demodulation Algorithm Integrated with a Phase Delay Compensation Module |
| title_sort | high stability pgc ekf demodulation algorithm integrated with a phase delay compensation module |
| topic | interferometric fiber optic sensing system phase-generated carrier phase delay compensation extended Kalman filter |
| url | https://www.mdpi.com/2304-6732/12/1/44 |
| work_keys_str_mv | AT hengyangzhao highstabilitypgcekfdemodulationalgorithmintegratedwithaphasedelaycompensationmodule AT fengzhu highstabilitypgcekfdemodulationalgorithmintegratedwithaphasedelaycompensationmodule AT xiaoxiaoxu highstabilitypgcekfdemodulationalgorithmintegratedwithaphasedelaycompensationmodule AT zonglingzhao highstabilitypgcekfdemodulationalgorithmintegratedwithaphasedelaycompensationmodule AT chuanludeng highstabilitypgcekfdemodulationalgorithmintegratedwithaphasedelaycompensationmodule |