Howtosignalprocessing
- What does a power spectrum tell you about a signal?
- How do you find the spectrum of a signal?
- How do you find the power of a frequency spectrum?
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 spectrum of a signal?
Frequency spectrum of a signal is the range of frequencies contained by a signal. For example, a square wave is shown in Fig. 3.5A. It can be represented by a series of sine waves, S(t) = 4A/π sin(2πft) + 4A/3π sin(2π(3f)t) + 4A/5π sin(2π(5f)t + …)
How do you find the power of a frequency spectrum?
Power spectrum (PS) of biological time series (of an electroencephalogram recording, for instance) often shows a relationship of decreasing power as a function of frequency (f) according to the general equation: PS(f) = ψ × f-α (Norena et al., 2010).
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