How to get amplitude and phase

  • Thread starter umarkhan
  • Start date
  • #1
8
0
hello,
if I have a sinusoidal signal that has changing amplitude and phase with respect to time, how can I find the amplitude and phase with respect to time?

So given x(t) the probem is to find a(t) and p(t)?

Thanks.
 

Answers and Replies

  • #2
9
0
There are various ways of estimating instantaneous amplitude and phase. Hilbert transform might be a good choice for that.
 
  • #3
245
0
There are many methods available. Short time Fourier transform, Wavelet transform, least squares method, auto regressive methods etc.
 
  • #4
4,662
6
Are you comparing this signal to a reference signal with constant amplitude and phase/frequency? Are you looking for a software solution, or a hardware circuit?
 

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