DSP Blockset Release Notes

Changes to Filtering Block Libraries

The new Filter Designs block library in DSP Blockset 4.1 replaces the old Filter Structures and Filter Designs block libraries in DSP Blockset 4.0, and contains the following blocks:

• Analog Filter Design
• Biquadratic Filter
• Digital Filter Design
• Direct-Form II Transpose Filter
• Filter Realization Wizard
• Overlap-Add FFT Filter
• Overlap-Save FFT Filter
• Time-Varying Lattice Filter
• Time-Varying Direct-Form II Transpose Filter

The new Digital Filter Design block in the Filter Designs block library (see New Digital Filter Design Block) replaces the following DSP Blockset 4.0 blocks:

• Digital FIR Filter Design
• Digital FIR Raised Cosine Filter Design
• Digital IIR Filter Design
• Least Squares FIR Filter Design
• Remez FIR Filter Design

Your models that contain these replaced blocks will still work, but they are no longer accessible in the Filter Designs library. You can still access these blocks by typing dspddes3 at the MATLAB command line, but you should use the Digital Filter Design block to design and implement filters in your new models.

Note    The Digital Filter Design block allows you to design a filter, and then implement it. To implement a filter you already designed, use the Digital Filter block, introduced in DSP Blockset 5.0 (Release 13).

Real-Time Workshop Generated C Code Enhancements

Major Bug Fixes