Plotting Spectrum Analysis

1. How do you plot a signal spectrum?
2. What is a plot spectrum?
3. What are the methods of spectral analysis?

How do you plot a signal spectrum?

Use fft to compute the discrete Fourier transform of the signal. y = fft(x); Plot the power spectrum as a function of frequency. While noise disguises a signal's frequency components in time-based space, the Fourier transform reveals them as spikes in power.

What is a plot spectrum?

A spectral plot is a graphical data analysis technique for examining frequency-domain models for a single equi-spaced time series or for. two equi-spaced time series. It is used to assess autocorrelation and cyclic structure. The spectral power function is a smoothed Fourier. transform of the autocovariance function.

What are the methods of spectral analysis?

Spectral analysis is done based on the nonparametric methods and the parametric methods. Nonparametric methods are based on dividing the time-domain data into segments, applying Fourier transform on each segment, computing the squared-magnitude of the transform, and summing and averaging the transform.