Monday, April 26, 2010

filtering method


The significant effect of the optical beat noise on the performance of low-coherence interferometer are numerically evaluated and discussed.Lab cheap wedding gown dresses virtual instrument is introduced. At LabVIEW platform the interference signal is processed, including data acquisition, display, low-pass filtering, median filtering, signal to cheap evening dresses noise ratio estimation and the beat frequency noise extraction. Powerful frequency-domain function modules in LabVIEW formed a very good complementary with MATLAB wavelet toolbox. This thesis 12hot cheap prom dresses mainly analyzing interference signal, based on traditional filtering method, fast Fourier filtering method and wavelet threshold denoising method. Through large experiment results discount wedding dresses comparing analysis, proves their each excellences and flaws. Multi-resolution analysis character of wavelet transform can well reflect signal local characteristic. The selection of wavelet blog lace wedding dresses threshold and wavelet base are the emphasis of this thesis.
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