DSP Blockset

Designing Discrete-Time Classical IIR and FIR Filters

The Digital FIR Filter Design and Digital IIR Filter Design blocks primarily design and implement discrete-time filters with standard band configurations. The first two sections to follow describe the key design parameters available in the block dialog boxes and how these parameters can be used to design a particular filter response:

• Design Parameters of Classical Discrete-Time Filters
• Specifying Classical Discrete-Time Filter Parameters

You may find it helpful to open the block dialog boxes on your computer, and experiment with the various parameter combinations as you read through these sections.

The next group of sections illustrate a variety of the responses that can be constructed using the block parameters:

• Lowpass and Highpass Discrete-Time FIR Filters
• Bandpass and Bandstop Discrete-Time FIR Filters
• Multiband Discrete-Time FIR Filters
• Arbitrary Shape Discrete-Time FIR Filters
• Discrete-Time IIR Filters

The final section, Example: Chebyshev Type II Lowpass Filter, presents a working lowpass filter model.

Filter Design Categorization

Design Parameters of Classical Discrete-Time Filters