Kirkeby’s regularization
•During the computation of the inverse filter,
usually operated in the
frequency domain, one usually finds expressions requiring to compute a ratio between complex spectra (H=A/D).
•Computing the reciprocal of the denominator D is generally not trivial, as the inverse of a
complex, mixed-phase
signal is generally unstable.
•The Nelson/Kirkeby regularization method is
usually employed for
this task:
