DSP Blockset

Blocks Supporting Fixed-Point

The following blocks are all of the blocks in the DSP Blockset that support fixed-point data types. These blocks are compatible with blocks from the Fixed-Point Blockset, and with Simulink blocks that support fixed-point data types. These blocks are colored orange in the DSP Blockset library. (Some of the blocks are Simulink blocks that are available in the DSP Blockset libraries as well as the Simulink libraries.)

To take full advantage of the fixed-point capabilities of the following blocks that are not Simulink blocks, you must install the Fixed-Point Blockset. For more information, see the topic on licensing information in the Fixed-Point Blockset documentation.

Buffer Check Signal Attributes Constant Diagonal Matrix Convert 1-D to 2-D Convert 2-D to 1-D Create Diagonal Matrix Data Type Conversion (Simulink block) Delay Line Discrete Impulse Display (Simulink block) Downsample DSP Constant Edge Detector Extract Diagonal Extract Triangular Matrix Filter Realization Wizard Flip Frame Status Conversion Identity Matrix Inherit Complexity Integer Delay Matrix Concatenation (Simulink block) Matrix Viewer Maximum Minimum Multiphase Clock

Multiport Selector N-Sample Enable N-Sample Switch Overwrite values Pad Permute Matrix Queue Repeat Sample and Hold Selector (Simulink block) Signal To Workspace Sine Wave Spectrum Scope Stack Submatrix Time Scope (Simulink block) Toeplitz Transpose Triggered Delay Line Triggered To Workspace Unbuffer Upsample Variable Integer Delay Variable Selector Vector Scope Zero Pad

Implementing Fixed-Point Filters

You can implement fixed-point filters with the Filter Realization Wizard block when you install the Filter Design Toolbox and the Fixed-Point Blockset. For more information, see the online reference page of the Filter Realization Wizard block.

Related Fixed-Point Topics

To learn more about fixed-point data types, see the following related documentation. (To access most of the features described in these documents, you must install the Fixed-Point Blockset, as described in the topic on licensing information in the Fixed-Point Blockset documentation.)

• Topic on fixed-point numbers in the Fixed-Point Blockset documentation -- How the Fixed-Point Blockset and DSP Blockset represent fixed-point numbers (sfix, ufix, sint, uint, sfrac, ufrac)
• The following online reference sections in the Fixed-Point Blockset:
• Blocks in the Data Type library -- Description of blocks for converting data types in a model
• References for sfix, ufix, sint, uint, sfrac, ufrac -- Description of functions for creating MATLAB structures describing various fixed-point data types
• Functions for conversions -- Description of functions for converting floating-point to fixed-point numbers, converting legacy models to use fixed-point data types, etc.
• Topics in the Filter Design Toolbox documentation on working with quantized filters and quantizing filters in the Filter Design and Analysis Tool GUI -- How to use Filter Design Toolbox to construct quantized filters that you can implement with the Filter Realization Wizard block
• Filter Realization Wizard block online block reference page -- Detailed information about the Filter Realization Wizard block, including how to use it to implement fixed-point filters.

Fixed-Point Support

Boolean Support