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How to generate a bandpass signal in Matlab and sample it ?

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Abhishek
Abhishek 2022-8-9
回答： Nithin Kumar 2023-6-8
I am trying to write a code that samples a bandpass signal with proper sampling frequency. I tried bandpass function but failed.

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Nithin Kumar
Nithin Kumar 2023-6-8
Ran in:
Hi Abhishek,
I understand that you are facing an issue while generating a bandpass signal in MATLAB.
To generate a bandpass signal with proper sampling frequency using MATLAB, kindly refer to the following example:
fs = 1000; % sampling frequency in Hz
t = 0:(1/fs):1; % time vector
noise = randn(size(t)); % generating white noise with normal distribution
[b,a] = butter(2, [50/(fs/2), 200/(fs/2)], 'bandpass'); % generating filter coefficients for a 2nd order bandpass filter with a passband between 50Hz and 200Hz
x = filter(b,a, noise); % applying filter to noise signal
figure;
plot(t,x);
xlabel('Time (s)');
ylabel('Amplitude');
title('Bandpass Signal');
For more information regarding the "butter" and "filter" functions, kindly refer to the following documentation:
Butterworth filter design - MATLAB butter - MathWorks India
1-D digital filter - MATLAB filter - MathWorks India
I hope this answer helps you.

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