A fully digital MIMO-OFDM scheme for fading mitigation in coherent Δϕ-OTDR
| Autor: | Jeremie Renaudier, Christian Dorize, Sterenn Guerrier, Elie Awwad |
|---|---|
| Přispěvatelé: | Télécom Paris, Département Communications & Electronique (COMELEC), Télécom ParisTech, Télécommunications Optiques (GTO), Laboratoire Traitement et Communication de l'Information (LTCI), Institut Mines-Télécom [Paris] (IMT)-Télécom Paris-Institut Mines-Télécom [Paris] (IMT)-Télécom Paris, Nokia Bell Labs [Paris-Saclay] |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Computer science
Orthogonal frequency-division multiplexing business.industry Single-mode optical fiber 02 engineering and technology Optical time-domain reflectometer MIMO-OFDM 021001 nanoscience & nanotechnology 01 natural sciences Multiplexing Atomic and Molecular Physics and Optics Frequency-division multiplexing 010309 optics [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI] [SPI]Engineering Sciences [physics] Optics Fiber optic sensor 0103 physical sciences Electronic engineering Fading 0210 nano-technology business ComputingMilieux_MISCELLANEOUS Computer Science::Information Theory |
| Zdroj: | Optics Express Optics Express, Optical Society of America-OSA Publishing, 2021, 29 (22), pp.35149-35160. ⟨10.1364/OE.436146⟩ |
| ISSN: | 1094-4087 |
| DOI: | 10.1364/OE.436146⟩ |
| Popis: | We introduce a coherent-MIMO Δϕ-OTDR based sensing technique that uses digital frequency division multiplexing of probing codes in order to mitigate the coherent fading issue in Δϕ-OTDR. Orthogonal frequency division multiplexing (OFDM) is used to probe the optical channel on several electrical subcarriers, and their responses are then combined according to specific reliability criterion to enhance the overall sensing sensitivity. This allows for a decrease of the noise floor in sensing measurements on standard single mode fiber (SSMF) and the mitigation of false alarms. Coherent MIMO-OFDM enables sensing over telecom fibers with a measured sensitivity level below 21 p ε / H z along 1.3km fiber over a mechanical bandwidth of 760Hz. Enhancements in the dynamic range for detection of mechanical excitation are presented with a gain over 18dB as compared to single-carrier probing. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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