User`s guide

4 DSP Operations

4-4

Filter Designs

Filter Designs library blocks apply specified filters to an input signal and

output the result. Depending on the block, you specify a filter with its filter

coefficients, or by setting filter specification parameters. The following table

categorizes Filter Designs library blocks by the types of filters they implement.

Filter Designs Library Blocks: Categorization and Description

Analog Filter Blocks

Analog Filter Design Implements a variety of non-time-varying time-domain analog

filters.

Digital Non-Time-Varying Time-Domain Filter Blocks

Digital Filter Design Implements a variety of digital FIR and IIR filters. You specify the

filter using the Filter Design and Analysis Tool (FDATool)

graphical user interface.

Filter Realization Wizard Implements custom digital non-time-varying time-domain filters.

Biquadratic Filter and

Direct-Form II Transpose

Filter

These blocks are included in the library for backward compatibility

of models using blocks from pervious DSP Blockset versions. To

implement biquadratic and direct-form II transpose filters in new

models, use the Digital Filter Design block.

Digital Time-Varying Time-Domain Filter Blocks

Time-Varying

Direct-Form II Transpose

Filter

Implements a direct-form II transpose whose filter coefficients can

be updated during the simulation.

Time-Varying Lattice

Filter

Implements a moving average or autoregressive lattice filter whose

filter reflection coefficients can be updated during the simulation.

Digital Frequency-Domain Filter Blocks

Overlap-Add FFT Filter Implements frequency-domain filters with the overlap-add method.

Overlap-Save FFT Filter Implements frequency-domain filters with the overlap-save

method.