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

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 mu...

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Vydáno v:	IEEE access Ročník 7; s. 167089 - 167098
Hlavní autoři:	Elgaud, Mohamed M., Zan, Mohd Saiful Dzulkefly, Ghaith, Abdulfatah Abushagur, Bakar, Ahmad Ashrif A., Arsad, Norhana, Naim, Nani Fadzlina, Mokhtar, Mohd Hadri Hafiz
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Piscataway IEEE 2019 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:	Bragg gratings Coding Encoding Fiber gratings Golay code Golay codes Properties (attributes) Pulse coding technique Sensors Signal to noise ratio simplex code TDM-FBG sensor Temperature measurement Time division multiplexing Time domain analysis
ISSN:	2169-3536, 2169-3536
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Abstract	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.
AbstractList	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.
Author	Zan, Mohd Saiful Dzulkefly Elgaud, Mohamed M. Ghaith, Abdulfatah Abushagur Arsad, Norhana Naim, Nani Fadzlina Bakar, Ahmad Ashrif A. Mokhtar, Mohd Hadri Hafiz
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SubjectTerms	Bragg gratings Coding Encoding Fiber gratings Golay code Golay codes Properties (attributes) Pulse coding technique Sensors Signal to noise ratio simplex code TDM-FBG sensor Temperature measurement Time division multiplexing Time domain analysis
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Title	Improving the Signal-to-Noise Ratio of Time Domain Fiber Bragg Grating Sensor Based on Hybrid Simplex and Golay Coding Technique
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