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From: Jim Lin on 10 May 2010 03:05
Hi guys,

I have built a digital filter using the basic elements (delay, gain, sum) in
Simulink, and specified the fixed-point format for each I/O and
coefficients. I am trying to estimate its frequency response, while it seems the spectrum analyzer block cannot output a nice bode plot. I want an estimated bode plot comparable to the one by theoretical analysis.

I know the "frestimate" in the control toolbox gives very good
frequency response estimation for floating-point system. Is there any
way I can obtain the similar estimation bode plot for the fixed-point system as "frestimate" for floating-point?

Thanks a lot for your help.
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Prev: Fixed-point frequency response estimate
Next: using rsim for standalone simulink models