How can I calculate the power spectral density of a gaussian pulse?

Hi everyone, How can I calculate the power spectral density of a gaussian pulse?

Answer 1

[Torsten]

Here is another one:

https://uk.mathworks.com/matlabcentral/answers/169376-power-spectral-density-two-approaches

[Erkan]

thanks for answer

Answer 2

[Mathieu NOE]

Gaussian Pulse - FFT & PSD in Matlab & Python - GaussianWaves

[Erkan]

thanks for your answer.

[Erkan]

There are parts of your answer that I don't understand. First, in subplot(2,1,2), why is divide abs(X) with fs? Second, why is divide Pxx with L^2?