I'm learning some basic signal processing to use in my research. So I'm trying to solve this combined signal:
$x(t)= \text{sin}(60\pi t+\theta)+ 0.5 \text{sin}(120\pi t+\theta)+ 0.3 \text{sin}(240\pi t+\theta)$
that are uniformly distributed in range $[0, 2\pi)$. Duration of the combined signal is 20 seconds.
Select a method (e.g. periodogram estimation, the Bartlett method, the Welch method) for estimation of the Power Spectral Density of the combined digital signal And make a parameter selection for the selected method, that provides the following frequency resolution a) 0.05 Hz b) 0.2 Hz c) 0.5 Hz in the frequency range 0-140 Hz.
How can the Power Spectral Density of the combined digital signal that shown above can be estimated?
pwelch
. See the documentation here: uk.mathworks.com/help/signal/ref/pwelch.html $\endgroup$ – Engineer Apr 6 '20 at 21:11