@article{078e8cea68e64a0694b266f999dc0f93,
title = "Nuisance alarm reduction: Using a correlation-based algorithm above differential signals in direct detected phase-OTDR systems",
abstract = "Significant research efforts have focused on techniques for alleviating the nuisance alarm rate (NAR) in the field of φ-OTDR pattern recognition systems. Unfortunately, ephemeral events were mostly neglected in previous research, and algorithms meant for improving classification accuracy were emphasized at the cost of acquiring a very large number of traces. This problem engendered an additional source of NAR in a specific class of events. The proposed solution uses a novel correlation based wrapper on top of differential signals that aims to filter out the effect of unnecessary phases in direct detected φ-OTDR systems. This technique avoids the use of irrelevant data in these differential signals by exploiting a better use of these unnecessary phases and provides a better intensity translation with fewer acquired traces as compared with contemporary techniques of extracting features.",
author = "M. Adeel and C. Shang and K. Zhu and C. Lu",
note = "Funding Information: National Natural Science Foundation of China (NSFC: 61435006, U1701661); the Research Grants Council (RGC) of Hong Kong, General Research Fund (GRF: PolyU 152658/16E, 152168/17E); The Hong Kong Polytechnic University (1-YW0S, 1-YW3G, 1-ZVFL), High-capacity fiber interconnects with optical filtering and electronic signal processing for data centers (PI, HKPU G-YBPH, 01/2017 12/2018). The authors wish to acknowledge their gratitude to Dr. Faisal Nadeem Khan and Dr. S. Y. Zhu from the Hong Kong Polytechnic University and Dr. Feng Hao from Tianjin University for their help and fruitful discussion. Funding Information: National Natural Science Foundation of China (NSFC: 61435006, U1701661); the Research Grants Council (RGC) of Hong Kong, General Research Fund (GRF: PolyU 152658/16E, 152168/17E); The Hong Kong Polytechnic University (1-YW0S, 1-YW3G, 1-ZVFL), High-capacity fiber interconnects with optical filtering and electronic signal processing for data centers (PI, HKPU G-YBPH, 01/2017 12/2018). Publisher Copyright: {\textcopyright} 2019 Optical Society of America.",
year = "2019",
doi = "10.1364/OE.27.007685",
language = "English",
volume = "27",
pages = "7685--7698",
journal = "Optics Express",
issn = "1094-4087",
publisher = "The Optical Society",
number = "5",
}