Signal Processing Toolbox

Filter Designer

The Filter Designer provides an interactive graphical environment for the design of digital IIR and FIR filters based on specifications that you enter on a magnitude or pole-zero plot.

Note    You can also use the Filter Design and Analysis Tool (FDATool) described in FDATool: A Filter Design and Analysis GUI for filter design and analysis.

Filter Types

You can design filters of the following types using the Filter Designer:

• Bandpass
• Lowpass
• Bandstop
• Highpass

FIR Filter Methods

You can use the following filter methods to design FIR filters:

• Equiripple
• Least squares
• Window

IIR Filter Methods

You can use the following filter methods to design IIR filters:

• Butterworth
• Chebyshev Type I
• Chebyshev Type II
• Elliptic

Pole/Zero Editor

You can use the Pole/Zero Editor to design arbitrary FIR and IIR filters by placing and moving poles and zeros on the complex z-plane.

Spectral Overlay Feature

You can also superimpose spectra on a filter's magnitude response to see if the filtering requirements are met.

Opening the Signal Browser

Opening the Filter Designer

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