DSP Blockset

Digital Filter Design Block

You can use the Digital Filter Design block to design and implement a digital filter. The filter you design can filter single-channel or multichannel signals. The Digital Filter Design block is ideal for simulating the numerical behavior of your filter on a single- or double-precision floating-point system, such as a personal computer or DSP chip. You can use Real-Time Workshop to generate C code from your filter block. For more information on generating C code from models, see Code Generation Support.

This section includes the following topics:

• Overview of the Digital Filter Design Block -- Learn the basic functionality of the Digital Filter Design block
• Choosing Between Filter Design Blocks -- Determine whether the Digital Filter Design block or the Filter Realization Wizard is right for your application
• Creating a Lowpass Filter -- Use the Digital Filter Design block to design and implement a lowpass filter
• Creating a Highpass Filter -- Use the Digital Filter Design block to design and implement a highpass filter
• Filtering High-Frequency Noise -- Create a system capable of filtering high-frequency noise using a highpass and a lowpass filter

Alternatively, you can use other MathWorks products, such as the Signal Processing Toolbox and Filter Design Toolbox, to design your filters. Once you design a filter using either toolbox, you can use one of the DSP Blockset's filter implementation blocks, such as the Digital Filter block, to realize the filters in your models. For more information, see the Signal Processing Toolbox documentation and Filter Design Toolbox documentation. To learn how to import and export your filter designs, see the Importing and Exporting Quantized Filters section of the Filter Design Toolbox documentation.

Filtering High-Frequency Noise

Overview of the Digital Filter Design Block