Improving the Signal-to-Noise Ratio of Time Domain Fiber Bragg Grating Sensor Based on Hybrid Simplex and Golay Coding Technique

Mohamed M. Elgaud; Mohd Saiful Dzulkefly Zan; Abdulfatah Abushagur Ghaith; Ahmad Ashrif A. Bakar; Norhana Arsad; Nani Fadzlina Naim; Mohd Hadri Hafiz Mokhtar

doi:10.1109/ACCESS.2019.2953512

IEEE Access (Jan 2019)

Improving the Signal-to-Noise Ratio of Time Domain Fiber Bragg Grating Sensor Based on Hybrid Simplex and Golay Coding Technique

Mohamed M. Elgaud,
Mohd Saiful Dzulkefly Zan,
Abdulfatah Abushagur Ghaith,
Ahmad Ashrif A. Bakar,
Norhana Arsad,
Nani Fadzlina Naim,
Mohd Hadri Hafiz Mokhtar

Affiliations

Mohamed M. Elgaud: ORCiD; Center of Advanced Electronic and Communication Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
Mohd Saiful Dzulkefly Zan: ORCiD; Center of Advanced Electronic and Communication Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
Abdulfatah Abushagur Ghaith: ORCiD; Faculty of Computing and Informatics, Multimedia University, Cyberjaya, Malaysia
Ahmad Ashrif A. Bakar: ORCiD; Center of Advanced Electronic and Communication Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
Norhana Arsad: ORCiD; Center of Advanced Electronic and Communication Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia
Nani Fadzlina Naim: ORCiD; Faculty of Electrical Engineering, Universiti Teknologi MARA, Shah Alam, Malaysia
Mohd Hadri Hafiz Mokhtar: ORCiD; Center of Advanced Electronic and Communication Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Bangi, Malaysia

DOI: https://doi.org/10.1109/ACCESS.2019.2953512
Journal volume & issue: Vol. 7
pp. 167089 – 167098

Abstract

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We report on the experimental results of the combination of unique auto-correlation properties of Golay complementary code and Hadamard matrix properties of standard simplex code. The combination of the two coding techniques results in improvement of the signal-to-noise ratio (SNR) of time domain multiplexed fiber Bragg grating (TDM-FBG) sensor for temperature measurement. Previously, we have analyzed the properties of both coding techniques when deployed separately in the TDM-FBG sensor. In this case, both coding techniques result in the same amount of SNR improvement for code length longer than 31 bits. In this paper, we demonstrate the combination and simultaneous deployment of the two techniques to measure multiple FBGs under room condition (25 °C) and 50 °C temperature. The two schemes combination results in remarkable improvement of SNR and still retains the original spatial property of the decoded FBG signals, confirming the successful deployment of the hybrid codes. From the measurement of two FBG sensors located after 16 km of fiber, the combination of 31 bits of simplex- and 64 bits of Golay codes has resulted in a total of 10.5 dB improvement of SNR.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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