SNR-Enhanced Fast BOTDA Combining Channel Estimation Technique With Complementary Pulse Coding
We have implemented a BOTDA that combines channel estimation and complementary coding technique for high performance distributed sensing. The use of OFDM-modulated probe reduces the measurement time sharply compared to the classical frequency sweeping technique. Meanwhile, the complementary coding p...
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IEEE
2018-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8480104/ |
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| author | Can Zhao Ming Tang Ruolin Liao Hao Wu Songnian Fu |
| author_facet | Can Zhao Ming Tang Ruolin Liao Hao Wu Songnian Fu |
| author_sort | Can Zhao |
| collection | DOAJ |
| description | We have implemented a BOTDA that combines channel estimation and complementary coding technique for high performance distributed sensing. The use of OFDM-modulated probe reduces the measurement time sharply compared to the classical frequency sweeping technique. Meanwhile, the complementary coding provides a higher SNR of the sensing system, which further reduces the measurement time by mitigating averaging. The method of combining the channel estimation technique and complementary coding is theoretically analyzed. It has been demonstrated that the pulse coding scheme can benefit both the Brillouin gain spectrum (BGS) and Brillouin phase spectrum (BPS). Experiments are carried out using 512-bit codewords on a 10-km single-mode fiber with a spatial resolution of 25 m. The complex BGS distribution is measured within 2 ms, with a BFS uncertainty of 1.1 and 0.6 MHz for BGS and BPS, respectively. |
| format | Article |
| id | doaj-art-18c4e04c33dd46e68e13eeffbc55f0ee |
| institution | OA Journals |
| issn | 1943-0655 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-18c4e04c33dd46e68e13eeffbc55f0ee2025-08-20T02:38:36ZengIEEEIEEE Photonics Journal1943-06552018-01-0110511010.1109/JPHOT.2018.28706158480104SNR-Enhanced Fast BOTDA Combining Channel Estimation Technique With Complementary Pulse CodingCan Zhao0Ming Tang1https://orcid.org/0000-0001-8669-4186Ruolin Liao2https://orcid.org/0000-0003-0511-2063Hao Wu3Songnian Fu4https://orcid.org/0000-0003-3330-9170Wuhan National Lab of Optoelectronics & National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Lab of Optoelectronics & National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Lab of Optoelectronics & National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Lab of Optoelectronics & National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Lab of Optoelectronics & National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaWe have implemented a BOTDA that combines channel estimation and complementary coding technique for high performance distributed sensing. The use of OFDM-modulated probe reduces the measurement time sharply compared to the classical frequency sweeping technique. Meanwhile, the complementary coding provides a higher SNR of the sensing system, which further reduces the measurement time by mitigating averaging. The method of combining the channel estimation technique and complementary coding is theoretically analyzed. It has been demonstrated that the pulse coding scheme can benefit both the Brillouin gain spectrum (BGS) and Brillouin phase spectrum (BPS). Experiments are carried out using 512-bit codewords on a 10-km single-mode fiber with a spatial resolution of 25 m. The complex BGS distribution is measured within 2 ms, with a BFS uncertainty of 1.1 and 0.6 MHz for BGS and BPS, respectively.https://ieeexplore.ieee.org/document/8480104/Fiber sensingBOTDAOFDMcomplementary coding. |
| spellingShingle | Can Zhao Ming Tang Ruolin Liao Hao Wu Songnian Fu SNR-Enhanced Fast BOTDA Combining Channel Estimation Technique With Complementary Pulse Coding IEEE Photonics Journal Fiber sensing BOTDA OFDM complementary coding. |
| title | SNR-Enhanced Fast BOTDA Combining Channel Estimation Technique With Complementary Pulse Coding |
| title_full | SNR-Enhanced Fast BOTDA Combining Channel Estimation Technique With Complementary Pulse Coding |
| title_fullStr | SNR-Enhanced Fast BOTDA Combining Channel Estimation Technique With Complementary Pulse Coding |
| title_full_unstemmed | SNR-Enhanced Fast BOTDA Combining Channel Estimation Technique With Complementary Pulse Coding |
| title_short | SNR-Enhanced Fast BOTDA Combining Channel Estimation Technique With Complementary Pulse Coding |
| title_sort | snr enhanced fast botda combining channel estimation technique with complementary pulse coding |
| topic | Fiber sensing BOTDA OFDM complementary coding. |
| url | https://ieeexplore.ieee.org/document/8480104/ |
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