Knowing the power of a portion of a signal's spectrum inside another signal's spectrum

1. What does a power spectrum tell you about a signal?
2. How do you find the power spectrum of a signal in Matlab?
3. Which of the signal describes the power present in the signal as a function of frequency per unit frequency?

What does a power spectrum tell you about a signal?

The power spectrum of a signal indicates the relative magnitudes of the frequency components that combine to make up the signal. The data used to determine the power spectrum must reflect sufficient excitation in the signal.

How do you find the power spectrum of a signal in Matlab?

p = pspectrum( x , fs ) returns the power spectrum of a vector or matrix signal sampled at a rate fs . p = pspectrum( x , t ) returns the power spectrum of a vector or matrix signal sampled at the time instants specified in t .

Which of the signal describes the power present in the signal as a function of frequency per unit frequency?

The power spectral density (PSD) of the signal describes the power present in the signal as a function of frequency, per unit frequency.