Period, amplitude and phase through FFT in MATLAB I need to compute period, amplitude and phase of the signal from spectrum analyser. It looks like a sine wave. Since i am new to MATLAB and also have limited idea about Fourier transforms, I am looking for a simplified explanation of how i might use FFT to compute period, phase and amplitude through MATLAB programming. The information i have regarding signal are: sweep time: 0.3183s sweep: 2001 save loop: 100. Thank you so much in anticipation.
Suppose your signal is x. 

L = length(x);                   %%% Length of your signal
nfft = L;                        %%% number of points in your fft
res = fft(x,nfft)/nfft;          %%% taking fft of your signal
f = fs/2*linspace(0,1,nfft/2+1); %%% defining correct frequency axis
res = res(1:nfft/2+1);           % half spectrum becos fft result is mirror
figure, plot(f,abs(res));        % here you can amplitude in freq domain  
figure, plot(f,angle(res));      % here you can see phase in freq domain.


Hopefully, this will be helpful to you.