Exporting to Simulink :: FDATool: A Filter Design and Analysis GUI (Signal Processing Toolbox)

Signal Processing Toolbox

Exporting to Simulink

If you have Simulink installed, you can export a Simulink block of your filter design and insert it into a new or existing Simulink model.

You can export a filter designed using any filter design method available in FDATool.

Note If you have the Filter Design Toolbox, you can export a CIC filter to Simulink, if you also have these toolboxes and blocksets installed in addition to Simulink: the Fixed-Point Toolbox and the Signal Processing Blockset.

After designing your filter, click the Realize Model sidebar button or select Export to Simulink Model from the File menu. The Realize Model panel is displayed.
Specify the name to use for your block in Block name.
Select the Destination -- Current to insert the block into the current (most recently selected) Simulink model or New to open a new model.
If you want to overwrite a block previously created from this panel, check Overwrite generated `Filter' block.

Note If you have the Signal Processing Blockset installed, a Build model using basic elements check box is included. If you deselect it, a Digital Filter block is created instead of a subsystem block, which uses separate subelements. See the Filter Realization Wizard and Choosing Between Filter Design Blocks in the Signal Processing Blockset documentation for information.

Select the desired optimization(s) for your block:

Optimize for zero gains -- removes zero-valued gain paths from the filter structure.
Optimize for unity gains -- substitutes a wire (short circuit) for gains equal to 1 in the filter structure.
Optimize for negative gains -- substitutes a wire (short circuit) for gains equal to -1 and changes corresponding additions to substractions in the filter structure.
Optimize delay chains -- substitutes delay chains composed of n unit delays with a single delay of n.

The following illustration shows the effects of each optimization:

Click the Realize Model button to create the filter block. The filter is implemented as a subsytem block using Sum, Gain, and Integer Delay blocks.

If you double-click the Filter block in Simulink, the filter structure is displayed. The following figure shows the first section of the default four-section, direct form II filter.

Exporting to SPTool Generating a C Header File