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To the noise in the vibration information of long-distance distributed optical fiber-sensing system, discrete wavelet transform was adopted to eliminate. On the basis of analyzing noise eliminating theory, wavelet shrinkage method was proposed and a few kinds of threshold selection rules were discussed. The processing results of different noise eliminating techniques to vibration signal and its energy distribution in frequency domain were simulated and analyzed. The results show that discrete wavelet transform has the same excellent performance with stationary wavelet transform in noise eliminating to vibration signal.
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