
From:  John Petro Jr. 
Subject:  [Tftbhelp] question about instfreq.m 
Date:  Tue, 25 May 2010 07:41:06 0400 
My question is about the instfreq.m file in the
toolbox. I understand instantaneous frequency to be the derivative of the
phase of the analytic signal. In the instfreq.m file the normalized frequency
is calculated by: fnormhat=0.5*(angle(x(t+1).*conj(x(t1)))+pi)/(2*pi); I agree that the output that I receive from this seems to be
correct, but I cannot find the relationship between these two. Could
someone please explain to me what I am missing, or point me in the right
direction for a reference to this calculation. Thank you, John 
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