| Page 19
18.05.2006 Angelo Farina
UNIPR / ASK Industries | All Rights Reserved | Confidential
Kirkeby
inverse filter
§The
Kirkeby inverse filter is computed inverting the measured IR
1) The IR
to be inverted is FFT transformed to frequency domain:
H(f) = FFT [h(f)]
2) The computation of the inverse filter is done in frequency domain:
Where e(f) is a small,
frequency-dependent
regularization parameter
frequency-dependent
regularization parameter
3) Finally, an IFFT brings back the inverse filter to time domain:
c(t) = IFFT [C(f)]
Frequency-dependent
regularization parameter
Inverse filter
