| Signal Processing Toolbox | |
Select the Import Filter sidebar button to import filter coefficients from MATLAB workspace variables, or to enter the filter coefficients directly.
Filter Coefficients Region
Select the desired filter representation from the Filter Structure menu.
The structure that you choose determines the type of coefficients that you need to specify in the Numerator and Denominator fields to the right. Follow the links above to learn more about specifying the coefficients.
Second-Order Sections. To import a direct-form I or II filter as second-order sections, select the Import as second-order sections check box. Specify the Gain and SOS Matrix parameters using any valid MATLAB variable or expression. See Filter Structures for more information.
Sampling Frequency. Select the Sampling Frequency units from among the following options in the Units menu:
For Hz, kHz, MHz, or GHz specify the value of the sampling frequency in the Fs field.
Direct-form
Specify the Numerator and Denominator polynomial coefficients using any valid MATLAB variable or expression. See Filter Structures for more information. (For direct-form FIR, you specify only the Numerator. The denominator for FIR filters is always 1.)
Click Clear to erase the coefficients.
Specify the Lattice coeff and Ladder coeff coefficients using any valid MATLAB variable or expression. See Filter Structures for more information.
Click Clear to erase the coefficients.
Discrete-time Filter (DFILT Object)
Specify a dfilt object and the sampling frequency.
Click Clear to erase the data.
Multirate Filter (MFILT Object)
If you have the Filter Design Toolbox, specify an mfilt object and the sampling frequency.
Click Clear to erase the data.
Select this button to import the specified filter coefficients.
| | Design Filter Button | Pole/Zero Editor Panel | |
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