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remove dc drift in respiration signal

hello everyone

 

I am now processing a respiration signal.

 

I found out that the dc drift problem is quite serious in my signal.

 

I tried wavelet detrend, but it didn't work.

 

Can anyone help me?

 

 

here is my signal

 

res.jpg

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What kind of processing are you doing?  That may make a difference for the DC removal. What parameters or characteristics of the respiration signal are you trying to obtain? Are you processing the data in batches or "chunks" or continuously?  How large are the batches?  Are successive batches continuous with the previous one?

 

The data you show certainly has a DC offset, but it is not clear that the DC is drifting.

 

Lynn 

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over the long term...(how long is up to you) the lungs must not burst or go lower than zero volume.  Each breath may not inhale fully, each exhale may not ehaust fully.  Managing the "DC" drift in this case may require that you look at several breaths and try to make the ultimate volume of the system constant...

 

Hope that helps

 

Hummer1

 

I try to breath some each day.  It seems to be important.

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