To design a low-pass filter in MATLAB, you can use the fir1
function, which designs a finite impulse response (FIR) filter with the given specifications. Here's an example code:
main.m329 chars13 lines
In this code, cutoff_freq
is the desired cutoff frequency of the filter, sampling_freq
is the sampling frequency of the signal, and filter_order
is the desired order of the filter. The function nyquist_freq
computes the Nyquist frequency, which is half of the sampling frequency, and cutoff_norm
converts the cutoff frequency to a normalized frequency between 0 and 1.
The fir1
function is then called with the filter order and cutoff frequency as arguments, and it returns the filter coefficients. Finally, the freqz
function is used to plot the frequency response of the filter.
Note that this example code designs a low-pass filter with a cutoff frequency of 1000 Hz, but you can modify the parameters to fit your specific application.
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