To implement a notch filter in MATLAB, you can use the iirnotch
function from the signal processing toolbox. This function designs a second-order IIR notch filter to remove a particular frequency from the input signal.
Here is an example of how to implement a notch filter in MATLAB:
main.m699 chars29 lines
In this example, we define the sampling frequency fs
, time vector t
, and the frequency of the sinusoid f
. We generate a noisy signal with a 50 Hz sinusoid added to it. We then use the iirnotch
function to design a notch filter with a center frequency of 50 Hz and a bandwidth of 1.43 Hz. We apply the resulting filter coefficients to the input signal using the filter
function, and plot both the original and filtered signals.
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