Application of the fast Fourier transform and parametric frequency estimation for the measurement of the Bragg wavelength of interferometrically interrogated fiber Bragg grating sensors
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A theoretical investigation on two techniques for the interrogation of fiber Bragg gratings (FBG) is reported. We compare two methods for decoding the Bragg wavelengths of gratings: the Fast Fourier Transform (FFT) processing and a parametric frequency estimation method called MUSIC. Results demonstrate that the second technique has advantages over the first one.
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