Matlab Power spectrum for analogue signal

[zaed_salah]

Hello everyone

I am newbie in Matlab, and I want to generate and plot power spectrum density for analogue signal , using dsp.data.psd.

Any help??

Thanks

 

[Aya2002]

type in the help window of matlab the words (power spectral density) you will get some results may help you, see this example:

Fs = 1000;
t = 0:1/Fs:1;
% 200Hz cosine + noise
x = cos(2*pi*t*200) + randn(size(t));
pwelch(x,128,120,[],Fs,'onesided')