Forums

IIR filter

Started by ianovitch_ovinskil November 7, 2002
Hello, I use Matlab to make treatment of the signal. I will like to
make a filter IIR having a frequency response which is the reverse of
that of reference. How can I do that?



Hi

If you have the magnitude values then you can use them
to design the required filter using FDA tool with
arbitrary magnitude specification.

If you know the coefficients of your reference filter
then just swap numerator and denominator.

HTH
Navan

--- ianovitch_ovinskil <>
wrote:
> Hello, I use Matlab to make treatment of the signal.
> I will like to
> make a filter IIR having a frequency response which
> is the reverse of
> that of reference. How can I do that?