Proceedings of the ISCIE International Symposium on Stochastic Systems Theory and its Applications
Online ISSN : 2188-4749
Print ISSN : 2188-4730
The 41st ISCIE International Symposium on Stochastic Systems Theory and Its Applications (Nov. 2009, Kobe)
Constant false alarm detection of spectral shift for scattering-based distributed optical fiber sensors
Ken'ichi NishiguchiArtur GuzikLi Che-HsienKinzo Kishida
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2010 Volume 2010 Pages 105-112

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Abstract
Rayleigh scattering in an optical fiber has the property that its spectrum shifts in proportion to strain and/or temperature changes, which makes distributed sensing of strain/temperature possible. To estimate the spectral shift, cross-correlation between spectra before and after the shift can be used. However, when the shift is large, the overlap portion of the spectra becomes small and false detection of a correlation peak readily arises. In this paper, we analytically obtain the probability of false alarm for cross-correlation coefficients and determine the threshold that gives a specified constant false alarm rate (CFAR). It is shown that stable estimates of spectral shifts are obtained by using the CFAR threshold.
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© 2010 ISCIE Symposium on Stochastic Systems Theory and Its Applications
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