Low-pass
Discrete Low-pass Filter
Library
GDFLIB
Description
Performs a Butterworth low-pass filter with specified cut-off frequency. The filter uses butter.m for calculation its coefficients.
Parameters and dialog box
The Low-pass block dialog box appears as follows:
Order of the filter can be from 1 to 4. Entry data specifies the way how the filter is defined. User can set the filter by cut-off frequency (cut-off_frequency) or directly by its coefficients (num_den_poly). Filter cut-off frequency is limited to pi/Ts to prevent Nyquist theorem violation.
Inputs and outputs
Inputs:
in - input signal
Outputs:
out - output filtered signal
See also
IIR, FIR, SMA,