i sampled a 50Hz signal at 800Hz and i want to use FFt to extract the magnitude of the fundamental frequency (50Hz). how do i go about it? Please can anyone be of help. Thank you
3 views (last 30 days)
Show older comments
i sampled a 50Hz signal at 800Hz and i want to use FFt to extract the magnitude of the fundamental frequency (50Hz). how do i go about it? Please can anyone be of help. Thank you
0 Comments
Answers (1)
Star Strider
on 26 Jun 2017
See the documentation on fft (link). Specifically note the code between the first (top) two plot figures.
2 Comments
Star Strider
on 26 Jun 2017
Contact Support (link)
This is essentially the code I referred to:
D = Your_Signal;
Fs = 800; % Sampling Frequency (Hz)
Fn = Fs/2; % Nyquist Frequency (Hz)
L = length(D);
FTD = fft(D)/L;
Fv = linspace(0, 1, fix(L/2)+1)*Fn; % Frequency Vector (Hz)
Iv = 1:length(Fv); % Index Vector
figure(1)
plot(Fv, abs(FTD(Iv))*2)
grid
See Also
Categories
Find more on Fourier Analysis and Filtering in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!