Howtosignalprocessing
How to make an envelope in Matlab?
Use a Hilbert filter with a length of 100. Plot the channels and the envelopes. Use solid lines for the upper envelopes and dashed lines for the lower envelopes. Call envelope without output arguments to produce a plot of the signal and its envelopes as a function of sample number.
What is a waveform envelope?
In physics and engineering, the envelope of an oscillating signal is a smooth curve outlining its extremes. The envelope thus generalizes the concept of a constant amplitude into an instantaneous amplitude. The figure illustrates a modulated sine wave varying between an upper envelope and a lower envelope.
