Design of Minimum-Phase FIR Filters with Delay Constraints
Olli Vainio and Seppo J. Ovaska
Tampere University of Technology
Abstract - The design of minimum-phase FIR filters with
time-domain constraints is discussed. Two new design
approaches are described, one for the white noise case
and the other for frequency-selective filters. For white
noise filtering, our objective is to reduce the delay of
the step response of the filter, measured typically at the
50% level of the full step. An analytical filter solution
is derived, giving the coefficients as a function of a
single weighting parameter. For predictive filters with
explicit frequency-domain specifications, a practical
design approach is proposed, allowing the design of
predictors with a specified stopband.