How to plot a graph on frequency domain when i don't have any time parameter?
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I have plotted a graph in comsoll Frequency vs S11 plot,i need to transform it in frequency domain spectrum.How to do it?
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Girijashankar Sahoo
am 28 Mai 2021
You are calculating return loss parameter with frequency.
Calculate PSD input and PSD of return signal
X(K)=(1/N)*fft(x(n)); PSDX=Pi=abs(X(K)*X(K)')
Y(K)=(1/N)*fft(y(n));PSDY=Pr=abs(Y(K)*Y(K)')
S11= 10log(Pi/Pr)
plot(f,S11)
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