How to code this periodic function?
4 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
I have this periodic function and I want to code it.I don't want to change the period and other parts of code because I calculate the fft of it.How can I do that?
syms x;
Fs = 50;
T = 1/Fs;
L = 100;
t = (0:L-1)*T;
X1 = zeros(1,length(t));
X1(abs(t)<T/4) = 1;
Y1 = fft(X1);
f = Fs*(0:(L-1))/L;
0 comentarios
Respuestas (1)
Walter Roberson
el 31 de Oct. de 2022
fft() assumes that the input is a subset of a periodic signal. For fft() purposes you can generate a positive integer number of cycles of samples and fft() that. Nothing special needs to be done, periodic is already assumed.
You should, however, take care that the last signal is the one before return to origin, not the return to origin itself. For example if you were sampling a function at each degree you would not sample at 0:360 (361 samples) you would sample at 0:359.
0 comentarios
Ver también
Categorías
Más información sobre Fourier Analysis and Filtering en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!