Curve envelope

[Alice12]

I am acquiring data using a PXI-5124 digitizer. The number of data points acquired is between 3000 to 4000.

The data is very noisy. I want to obtain envelopes of the data

as shown in the attached figure (blue curve is the acquired signal and red curves in both the pictures is the desired curve).

How do I do this in labview ?

[vt92]

Check out this thread:

http://forums.ni.com/t5/LabVIEW/extract-the-envelop-of-waves/m-p/685026?requireLogin=False

You may find some useful info.