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Dscrete wavelet transform in MATLAB

Discussion in 'Programmer's Corner' started by riheen, Mar 22, 2013.

  1. riheen

    Thread Starter New Member

    Sep 18, 2009
    2
    0
    Hi ,
    I am doing EEG signal processing. Suppose, my data is sampled with 500Hz. So, according to Nyquist theorem there is 250 hz spectrum. I filtered the signal 0-64 Hz. I need detail coefficients of 8-16Hz band. Now how much decomposition level is required?? 3 or 5??
     
  2. WBahn

    Moderator

    Mar 31, 2012
    24,562
    7,700
    You low pass filtered it to 64Hz before sampling it at 500Hz?
     
  3. riheen

    Thread Starter New Member

    Sep 18, 2009
    2
    0
    yes, i used butterwoth filtering technique for low pass filtering.
     
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