From frequency to time domain
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
I have the function S, representing the sea elevation spectrum in frequency domain.
S= 300x365 , being the spectra for 365 days in 300 frequency timestep.
I want to translate the function to time domain, simulating S for every second in a day (86400s).
How can I implement this?
thank you in advance.
0 Kommentare
Akzeptierte Antwort
Jon
am 17 Feb. 2022
If I understand what you are asking for correctly I am assuming that your matrix S has the fft of the original time domain data.
I think you could then recover it and interpolate to get data for every second in the day using:
% make time vector for original spacing (300 samples per day)
t = linspace(0,86400-1,300);
% recover time domain signal
X = ifft(S);
% interpolate intermediate values
tq = 0:86400-1;
Xq = interp1(t,X,tq)
3 Kommentare
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Transforms finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!