Signal Processing Toolbox

Converting to Second-Order Sections

You can use Convert to Second-order Sections on the Edit menu to store the converted filter structure as a collection of second-order sections rather than as a monolithic higher-order structure.

The following Scale options are available when converting a direct form II structure only:

• None (default)
• L-2 (L² norm)
• L-infinity (L norm)

The Direction (Up or Down) determines the ordering of the second-order sections. The optimal ordering changes depending on the Scale option selected.

For example:

• Select Convert to Second-order Sections from the Edit menu to open the Convert to SOS dialog box.
• Select L-infinity from the Scale menu for L norm scaling.
• Leave Up as the Direction option.

Note    To convert from second-order sections back to a single section, use Convert to Single Section on the Edit menu.

Converting the Filter Structure

Importing a Filter Design