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 Filter Design and Analysis Tool 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