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psd of any signal

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Achintya Roy
Achintya Roy on 31 Mar 2014
Closed: MATLAB Answer Bot on 20 Aug 2021
How to find psd of any signal and I want the data as frequency(rad/sec) vs power

Answers (2)

Carlos
Carlos on 31 Mar 2014
Try something like this
N = length(x);
xfft = fft(x);
psdx = (1/(2*pi*N)).*abs(xfft).^2;
freq = 0:(2*pi)/N:2*pi-(2*pi)/N;
plot(freq./pi,10*log10(psdx)); grid on;

Achintya Roy
Achintya Roy on 31 Mar 2014
Is there any theory behind this

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