Transfer function with tfestimate

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Niels Barella
Niels Barella 2016-12-23
评论： Niels Barella 2016-12-23
Hello,
I am trying to calculate the transfer function from a self-created filter. I want to try this using a noise signal which i will filter. Blue is x, red is filtered x.
x = randn(16384,1);
This filter has the properties:
filter fs = 8000.
Now i want to calculate the transfer function which i have created for the filter by using the function: tfestimate and compare the phases from the filter transfer function and estimated transfer function. So lets say the orginal signal is called x and the filtered signal is y.
The problem is when i use tfestimate the output data is not correct.
[Txy,f] = tfestimate(x,y,1024,[],[],fs)
figure
semilogx(f,mag2db(abs(Txy)))
If someone could help me, it would be appreciated.
  1 个评论
Niels Barella
Niels Barella 2016-12-23
Update: So now i use a frequentie cap-off of 100 Hz.
I had the frequency wrong(fs)..... I guess i need a rubber duck ;D.

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