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Questions and Answers
What does the power spectrum $S_{xx}(f)$ of a time series $x(t)$ describe?
What does the power spectrum $S_{xx}(f)$ of a time series $x(t)$ describe?
- The distribution of power into frequency components composing the signal (correct)
- The phase shift of the time series
- The amplitude of the time series over a continuous range
- The time duration of the signal
According to Fourier analysis, how can any physical signal be decomposed?
According to Fourier analysis, how can any physical signal be decomposed?
- Into a single frequency component
- Into a number of discrete frequencies or a spectrum of frequencies over a continuous range (correct)
- Into a time series representation
- Into a random distribution of frequencies
What does the power spectral density (PSD) refer to?
What does the power spectral density (PSD) refer to?
- The statistical average of a signal in terms of its frequency content
- The amplitude of the signal at a specific time
- The phase shift of the signal
- The distribution of power into frequency components over all time (correct)
When is the energy spectral density computed?
When is the energy spectral density computed?
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What is the power spectral density (PSD) commonly used for?
What is the power spectral density (PSD) commonly used for?
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