基于时间局部 GMCC 和 ICEEMDAN-WT 组合的φ-OTDR 信号改进去噪方法

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2024-09-03 DOI:10.1016/j.yofte.2024.103949

Ganliang Xiang , An Sun , Yanming Liu , Longxuan Gao

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引用次数: 0

摘要

为了提高相敏光学时域反射仪（φ-OTDR）系统信号的噪声抑制比（NRR），提出了一种基于改进的完全集合经验模态分解与自适应噪声和时间局部广义最大交叉相关熵和小波阈值（ICEEMDAN-TLGMCC-WT）相结合的降噪方法。首先，介绍了 ICEEMDAN-TLGMCC-WT 去噪方法的原理。结果表明，采用 ICEEMDAN-TLGMCC-WT 去噪方法后，在 5 km 感测距离内检测到的振动事件的平均 NRR 提高了 72.18 dB，均方根误差（RMSE）为 0.017，证实了所提方案在提高φ-OTDR 系统性能方面的有效性。

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An improved denoising method for φ-OTDR signal based on the combination of temporal local GMCC and ICEEMDAN-WT

A noise reduction method based on the combination of improved complete ensemble empirical mode decomposition with adaptive noise and temporal local generalized maximum cross-correlation entropy and wavelet threshold (ICEEMDAN-TLGMCC-WT) is proposed to improve the noise rejection ratio (NRR) of phase-sensitive optical time-domain reflectometer ( $φ$ -OTDR) system signals. Firstly, the principle of the proposed ICEEMDAN-TLGMCC-WT denoising method is introduced. On this basis, experiments are carried out to verify the feasibility of the noise reduction algorithm for non-stationary signals. and the results demonstrate that the vibration event can be detected with an improved average NRR of 72.18 dB and a root mean square error (RMSE) 0.017 within 5 km sensing distance by employing the ICEEMDAN-TLGMCC-WT denoising method, which confirm the effectiveness of proposed scheme for the performance improvement of $φ$ -OTDR system.

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来源期刊

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.