Notch filter
Purpose
Description
Macro Synopsis
Modules
Related Functions
Purpose
Notch filter
Description
Notch filter applies a notch filter to the
given signal. A notch filter ideally suppresses a single frequency component
(the notch frequency) within the input signal, or a narrow symmetric window
around the notch frequency. A parameter for the width of the affected
frequency window is the relative transition width w, given as a fraction of the
notch frequency 
.
The transfer function H(f) of the notch filter is
with f denoting the frequency.
Parameters are
- the notch frequency f0 in reciprocal x-axis units and
- the relative transition width w ranging from 0 to 1.
Macro Synopsis
y = NotchFilt(x,f0,w);
signal x,y;
float f0,w;
Modules
Spectral
Related Functions
Gauss filter, High pass filter,
Low pass filter, Band pass filter