Decompose a signal into its component signals

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Gova ReDDy
Gova ReDDy 2013 年 10 月 6 日
コメント済み: Walter Roberson 2013 年 10 月 6 日
Hello,
I have a PPG signal as shown here
From the information published here it says the PPG signal shown in the image has three components AC(pulsatile changes),DC and other AC component of ambient light component of 60Hz. From the image it can be understood.I want to extract them individually.
Is this possible with the MATLAB as I need them for designing the filters for the post processing. Can someone help with extraction of individuals components to check the respective amplitude and frequency of each signal. Thanks in Advance.
  2 件のコメント
Jan
Jan 2013 年 10 月 6 日
Are you looking for the fft command?
Walter Roberson
Walter Roberson 2013 年 10 月 6 日
Or perhaps mean() to find the DC component, subtract the mean from the signal, fft() that, locate the 60Hz component, zero it out in the frequency domain (remember to get the mirror component too), then inverse fft ?

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