Hi,
I understand that you want to present the amplitude spectrum of a rectangular signal with a 2V amplitude and a duration of 1 ms.
I assume you want to do this using the Fourier Transform.
In order to present the amplitude spectrum of the rectangular signal, you can follow the below steps:
Generate the Rectangular Signal:
Create a rectangular pulse with a specified amplitude and duration.
fs = 10000; % Sampling frequency in Hz
t = 0:1/fs:1-1/fs; % Time vector for 1 second
rect_signal = 2 * (t < 0.001); % 2V amplitude, 1ms duration
Compute the Fourier Transform:
Use the “fft” function to transform the rectangular signal into the frequency domain.
Y = fft(rect_signal);
L = length(rect_signal);
P2 = abs(Y/L); % Two-sided spectrum
P1 = P2(1:L/2+1); % Single-sided spectrum
P1(2:end-1) = 2*P1(2:end-1);
Define the Frequency Domain:
Create a frequency vector for plotting.
f_axis = fs*(0:(L/2))/L;
Plot the Amplitude Spectrum:
Visualize the single-sided amplitude spectrum.
plot(f_axis, P1);
title('Single-Sided Amplitude Spectrum of Rectangular Signal');
xlabel('Frequency (Hz)');
ylabel('|P1(f)|');
Analyze the Spectrum:
Note that the spectrum will display sinc-like characteristics due to the Fourier Transform of a rectangular pulse.
Refer to the documentation of “fft” function to know more about its usage:
Hope this helps!
