Signal generation on Simulink?
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I would like to know how can I generate a signal that looks like this (in the image) mainly using Simulink or a script function that can be employed later in simulink.
Thanks
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Answers (2)
Arif Hoq
on 22 Feb 2022
You can use this script in a function block of Simulink. Just take y as a output in the simulink block.
fs = 9000; % signal sampled at a rate of 200 Hz for 1 second
t = 0:1/fs:1;
y1 = cos(2*pi*30*t);
y2 = cos(2*pi*5*t); % 5 Hz modulating signal
y2 = rescale(y2,0.15,1); % modulation amplitude min/max factor
y = y1 .* y2; % create amplitude-modulated signal
plot(y(1:7000))
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Sulaymon Eshkabilov
on 22 Feb 2022
This modulation signal can be generated using the following Simulink model and/or this M-ffile:
fs = 5000; % sampling frequency (Hz)
t = 0:1/fs:1; % time vector
x = (1.25+sin(2*pi*25*t+pi/2)).*sin(2*pi*t*175);
plot(t,x), grid on
xlim([0, 0.25])
xlabel('Time, [sec]')
ylabel('Amplitude')
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