User`s guide

Filter Realization Wizard
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5Filter Realization Wizard
Purpose Automatically construct filter realizations using Sum, Gain, and Unit Delay
blocks.
Library Filtering / Filter Designs
Description The Filter Realization Wizard is a tool for automatically creating filter
realizations with specific architectures. The Wizard’s interface allows you to
specify the filter’s structure and coefficients, the type of data to be filtered, and
optimization criteria for the design. The Wizard then builds the specified filter
as a subsystem composed of Sum, Gain, and Unit Delay blocks. You can specify
the name of the subsystem (“Filter” is the default) and whether it is placed in
the current model or in a new model.
The
Architecture panel in the Wizard’s interface allows you to select from the
following realizations.
The
Optimization panel in the Wizard’s interface lets you choose to optimize
for zero and unity gains. Zero-gain optimization removes zero-gain paths from
the filter structure, and unity-gain optimization substitutes a wire (short
circuit) for unity gains.
Type a name for the new filter block in the
Block Name text field, and select
where the block should be placed from the
Destination pop-up menu. Within
a model, the Filter subsystem operates on a sample-based signal (similar to
Simulink’s Discrete Filter block), filtering each channel over time. Double-click
on the subsystem to open it; you can then modify the gains or the filter
structure to suit your needs.
Architecture Parameters
Direct-Form I Numerator, denominator
Direct-Form II Numerator, denominator
Symmetric FIR Coefficients
Lattice (AR) Lattice coefficients
Lattice (MA) Lattice coefficients
Lattice (ARMA) Lattice coefficients, ladder coefficients