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Time and frequency localized pulse shape for resolution enhancement in STFT-BOTDR

Time and frequency localized pulse shape for resolution enhancement in STFT-BOTDR
Time and frequency localized pulse shape for resolution enhancement in STFT-BOTDR
Short Time Fourier Transform-Brillouin Optical Time Domain Reflectometry (STFT-BOTDR) implements STFT over the full frequency spectrum to measure the distributed temperature and strain along the optic fiber, providing new research advances in dynamic distributed sensing. The spatial and frequency resolution of the dynamic sensing is limited by the Signal to Noise Ratio (SNR) and the Time-Frequency (T-F) localization of the input pulse shape. T-F localization is fundamentally important for the communication system, which suppresses interchannel interference (ICI) and intersymbol interference (ISI) to improve the transmission quality in multi-carrier modulation (MCM). This paper demonstrates that the T-F localized input pulse shape can enhance the SNR, the spatial and frequency resolution in STFT-BOTDR. Simulation and experiments of T-F localized different pulses shapes are conducted to compare the limitation of the system resolution. The result indicates that rectangular pulse should be selected to optimize the spatial resolution, Lorentzian pulse could be chosen to optimize the frequency resolution, while Gaussian shape pulse can be used in general applications for its balanced performance in both spatial and frequency resolution. Meanwhile, T-F localization is proved to be useful in the pulse shape selection for system resolution optimization.
1687-725X
1-10
Luo, Linqing
4cdb9509-9f7b-45b1-834c-c28743ad57b8
Li, Bo
30acbe59-a3fe-47a8-9e6a-2dd279f38a7a
Yu, Yifei
5796fabf-53ec-4312-a5c0-93c172023d88
Xu, Xiaomin
306a6edb-430e-4f3f-bcab-15b9834060c3
Soga, Kenichi
e43028e3-af4d-4ea4-a747-6cc6dacc849b
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828
Luo, Linqing
4cdb9509-9f7b-45b1-834c-c28743ad57b8
Li, Bo
30acbe59-a3fe-47a8-9e6a-2dd279f38a7a
Yu, Yifei
5796fabf-53ec-4312-a5c0-93c172023d88
Xu, Xiaomin
306a6edb-430e-4f3f-bcab-15b9834060c3
Soga, Kenichi
e43028e3-af4d-4ea4-a747-6cc6dacc849b
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828

Luo, Linqing, Li, Bo, Yu, Yifei, Xu, Xiaomin, Soga, Kenichi and Yan, Jize (2016) Time and frequency localized pulse shape for resolution enhancement in STFT-BOTDR. Journal of Sensors, 2016 (3204130), 1-10. (doi:10.1155/2016/3204130).

Record type: Article

Abstract

Short Time Fourier Transform-Brillouin Optical Time Domain Reflectometry (STFT-BOTDR) implements STFT over the full frequency spectrum to measure the distributed temperature and strain along the optic fiber, providing new research advances in dynamic distributed sensing. The spatial and frequency resolution of the dynamic sensing is limited by the Signal to Noise Ratio (SNR) and the Time-Frequency (T-F) localization of the input pulse shape. T-F localization is fundamentally important for the communication system, which suppresses interchannel interference (ICI) and intersymbol interference (ISI) to improve the transmission quality in multi-carrier modulation (MCM). This paper demonstrates that the T-F localized input pulse shape can enhance the SNR, the spatial and frequency resolution in STFT-BOTDR. Simulation and experiments of T-F localized different pulses shapes are conducted to compare the limitation of the system resolution. The result indicates that rectangular pulse should be selected to optimize the spatial resolution, Lorentzian pulse could be chosen to optimize the frequency resolution, while Gaussian shape pulse can be used in general applications for its balanced performance in both spatial and frequency resolution. Meanwhile, T-F localization is proved to be useful in the pulse shape selection for system resolution optimization.

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Accepted/In Press date: 13 December 2015
e-pub ahead of print date: 2016
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 393243
URI: http://eprints.soton.ac.uk/id/eprint/393243
ISSN: 1687-725X
PURE UUID: db44bf7c-b8a0-48a5-9908-a9ef623886b3
ORCID for Jize Yan: ORCID iD orcid.org/0000-0002-2886-2847

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Date deposited: 25 Apr 2016 09:18
Last modified: 08 Jan 2022 03:25

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Contributors

Author: Linqing Luo
Author: Bo Li
Author: Yifei Yu
Author: Xiaomin Xu
Author: Kenichi Soga
Author: Jize Yan ORCID iD

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