Hi Everybody
 Im new here und i have a question from my Bachelorthesis

In a Matlab system ,I  have the estimated transfer function from the channel,
simply ch_est (in frequency domain), and that is a 64x1 Matrix
You can say that the channel is a FIR Filter with finite impulse response.

I have heard that, the inversion of a FIR Filter is always a IIR Filter,   with
infinite impulse response

I have used the simplest method, expres 1./ch_est and then taking back in the
time domain, but the impulse response from my  inverse Filter is finite, also a
FIR filter 

How can i get a IIR Filter, when i inverse the FIR Filter ?

Many thanks

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