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It is customary in the wave digital filter literature to define the
alpha parameters as
|
(N.17) |
where
are the admittances of the wave digital
element interfaces (or ``reference admittances,'' in WDF terminology).
In terms of the alpha parameters, the force-wave parallel adaptor
performs the following computations:
We see that multiplies and additions are required.
However, by observing from
Eq. (N.17) that
we may implement , say, as
in order
to eliminate one multiply. In WDF terminology, port 1 is then a
dependent port.
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