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From: David Cubero on 28 Jun 2010 13:24
Hello i want to create an envelope detector to demodulate AM.
a(t)=x(t)+j(hilbert(x(t))
The envelope of x(t) should be then
abs(hilbert(x(t))) ??????
From: Wayne King on 28 Jun 2010 13:35
"David Cubero" <sirdivi(a)hotmail.com> wrote in message <i0als8$k2f$1(a)fred.mathworks.com>...
> Hello i want to create an envelope detector to demodulate AM.
> a(t)=x(t)+j(hilbert(x(t))
> The envelope of x(t) should be then
> abs(hilbert(x(t))) ??????

Hi David, yes, the envelope is the absolute value of the analytic signal, but just keep in mind that in MATLAB, hilbert() returns the analytic signal.

Wayne
From: David Cubero on 28 Jun 2010 13:47
so, it should be used abs(a(t))

thank you vey much!
From: David Cubero on 28 Jun 2010 14:14
or it should be

a(t) = a(t)=hilbert(x(t)
abs ( a ( t) )
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