Friday, May 2, 2008

Exploring: wavelet xforms and other analysis tools

  • wavelet xforms
    • Wavelet tutorial
      • http://users.rowan.edu/~polikar/wavelets/wttutorial.html
    • MATLAB Cohen-Daubechies-Feauveau 9/7 (CDF 9/7) wavelet transform
      • http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=6449
    • Paper's ordered
      • http://lib.bioinfo.pl/pmid:12705422
      • http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V18-4MW31YG-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=b68a247d8cc31b9f06d58f774883bd03
    • Wavelets plot frequency,time, and amplitude at the same time.
      • great for non-stationary signals or signals that change over time
      • good for signal pre-processing
  • Time series outlier detection method
  • exponential smoothing

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