How to understand the basis sinusoids of 3D FFT?

1. How do you read a FFT plot?
2. What are the two basic classes of FFT algorithm?
3. What the FFT analysis of a signal tells us about the signal?
4. What is the FFT of a sine wave?

How do you read a FFT plot?

FFTs of complex vibrations have multiple peaks- one for each frequency present in the vibration. Low frequency peaks are shown at the left end of the graph. The left-most peak represents the fundamental. Other peaks indicate overtones.

What are the two basic classes of FFT algorithm?

There are two main families of FFT algorithms: the Cooley-Tukey algorithm and the Prime Factor algorithm.

What the FFT analysis of a signal tells us about the signal?

The output of the FFT is a complex vector containing information about the frequency content of the signal. The magnitude tells you the strength of the frequency components relative to other components. The phase tells you how all the frequency components align in time.

What is the FFT of a sine wave?

The FFT. The function fft( ) estimates the coefficients of the Fourier transform, transforming a time-domain signal (i.e., an observed fMRI time series) into a series of sine waves with different amplitudes and phases. Fourier coefficients are complex numbers, with values in the real and imaginary planes.